[ISSUE] Regression in Linux5.11? 4k resolution over displayport missing.

[ISSUE] Regression in Linux5.11? 4k resolution over displayport missing.

[adriangoransson]

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New issue by adriangoransson on void-packages repository

https://github.com/void-linux/void-packages/issues/29394

Description:
<!-- Don't request update of package. We have a script for that. https://alpha.de.repo.voidlinux.org/void-updates/void-updates.txt . However, a quality pull request may help. -->

Hi! and apologies if this is nowhere near the correct forum to ask this (where might that be?). I noticed that upon upgrading to Linux5.11 from 5.10 that I could no longer use the maximum resolution of my external monitor. I can confirm that it does work on 5.9 and 5.10 (although for 5.10 it didn't once after a point upgrade so it seems a bit flaky).
### System

* xuname:
`Void 5.11.4_1 x86_64 GenuineIntel uptodate rFFF`
* packages: I don't know what may be the culprit so here's a bunch of them!
`linux5.11-5.11.4_1` (incl. headers)
`linux-firmware-intel-20210208_2`
`intel-media-driver-20.4.5_1`
`xf86-video-intel-2.99.917.20200515_1`
The same configuration works just fine on older kernels: `linux5.10-5.10.22_1` and `linux5.9-5.9.16_1`.
* /proc/cmdline if that is helpful
`BOOT_IMAGE=/boot/vmlinuz-5.11.4_1 root=/dev/mapper/void-root ro loglevel=4 init_on_free=1 rd.lvm.vg=void rd.luks.uuid=<uuid> resume=/dev/void/swap`

### Expected behavior
Using `xrandr`, the full resolution (3840x2160) of my external monitor should be visible.
### Actual behavior
```sh
xrandr
# snip
DP3 connected (normal left inverted right x axis y axis)
   2560x1440     59.95  
   1920x1200     59.88  
   1920x1080     60.00    60.00    50.00    59.94    24.00    23.98  
   1920x1080i    60.00    50.00    59.94  
# more output modes...
```

### Steps to reproduce the behavior
Boot Linux5.11 and try to set the monitor resolution.
I have a laptop with a Intel Tiger Lake 1165G7 processor with integrated graphics. It is connected to a Dell P2715Q with Displayport over USB-C.

Re: Regression in Linux5.11? 4k resolution over displayport missing.

[ericonr]

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New comment by ericonr on void-packages repository

https://github.com/void-linux/void-packages/issues/29394#issuecomment-796741061

Comment:
Maybe https://gitlab.freedesktop.org/drm/intel/-/issues/3179 ?

I will try to look at the config, but I'm doubtful that's the issue, since it's copied straight from 5.10.

Re: Regression in Linux5.11? 4k resolution over displayport missing.

[adriangoransson]

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New comment by adriangoransson on void-packages repository

https://github.com/void-linux/void-packages/issues/29394#issuecomment-796787481

Comment:
I'm not entirely sure that I understand the issue, but it does look a little suspicious. I'll keep an eye on it, thanks @ericonr!

If there's anything I can do to help, just tell me!

Re: Regression in Linux5.11? 4k resolution over displayport missing.

[ericonr]

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New comment by ericonr on void-packages repository

https://github.com/void-linux/void-packages/issues/29394#issuecomment-796818266

Comment:
You can try to look at dmesg and see if there's anything suspicious, though the definition of "suspicious" here is rather broad.

Re: Regression in Linux5.11? 4k resolution over displayport missing.

[adriangoransson]

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New comment by adriangoransson on void-packages repository

https://github.com/void-linux/void-packages/issues/29394#issuecomment-797311666

Comment:
Sorry for the delay! I tried diffing the 5.10 and 5.11 dmesg but didn't find anything in particular.

Here's a diff if it may help. I've sorted it to avoid identical lines being included just because they appeared in different order.

```diff
diff --git a/2021-03-12T08:27:58 CET-Void 5.10.22_1 x86_64 GenuineIntel uptodate rFFF-dmesg.clean.sorted.log b/2021-03-12T08:26:57 CET-Void 5.11.4_1 x86_64 GenuineIntel notuptodate rFFF-dmesg.clean.sorted.log
index 9e5e090..38d0acf 100644
--- a/2021-03-12T08:27:58 CET-Void 5.10.22_1 x86_64 GenuineIntel uptodate rFFF-dmesg.clean.sorted.log	
+++ b/2021-03-12T08:26:57 CET-Void 5.11.4_1 x86_64 GenuineIntel notuptodate rFFF-dmesg.clean.sorted.log	
@@ -28,10 +28,10 @@ ACPI: Added _OSI(Processor Aggregator Device)
 ACPI: Added _OSI(Processor Device)
 ACPI: APIC 0x0000000045BCF000 00012C (v03 LENOVO CB-01    00000001 ACPI 00040000)
 ACPI: BGRT 0x0000000045B77000 000038 (v01 LENOVO CB-01    00000001 ACPI 00040000)
-ACPI BIOS Error (bug): Could not resolve symbol [\_SB.PC00.I2C0.TPL1], AE_NOT_FOUND (20200925/dswload2-162)
+ACPI BIOS Error (bug): Could not resolve symbol [\_SB.PC00.I2C0.TPL1], AE_NOT_FOUND (20201113/dswload2-162)
 ACPI: bus type PCI registered
 ACPI: bus type USB registered
-ACPI: Core revision 20200925
+ACPI: Core revision 20201113
 ACPI: DBG2 0x0000000045BD3000 000054 (v00 LENOVO CB-01    00000001 ACPI 00040000)
 ACPI: DBGP 0x0000000045BD4000 000034 (v01 LENOVO CB-01    00000001 ACPI 00040000)
 ACPI: DMAR 0x0000000045B7A000 0000B8 (v02 LENOVO CB-01    00000001 ACPI 00040000)
@@ -55,7 +55,7 @@ ACPI: EC: GPE=0x6e
 ACPI: EC: interrupt blocked
 ACPI: EC: interrupt unblocked
 ACPI: Enabled 7 GPEs in block 00 to 7F
-ACPI Error: AE_NOT_FOUND, During name lookup/catalog (20200925/psobject-220)
+ACPI Error: AE_NOT_FOUND, During name lookup/catalog (20201113/psobject-220)
 ACPI: FACP 0x0000000045BFD000 00010C (v06 LENOVO CB-01    00000001 ACPI 00040000)
 ACPI: FACS 0x0000000045AA3000 000040
 ACPI: FPDT 0x0000000045B78000 000044 (v01 LENOVO CB-01    00000001 ACPI 00040000)
@@ -138,14 +138,14 @@ ACPI: SSDT 0x0000000045BED000 003314 (v02 LENOVO CB-01    00000001 INTL 20160422
 ACPI: SSDT 0x0000000045BF1000 002AFE (v02 LENOVO CB-01    00000001 INTL 20160422)
 ACPI: SSDT 0x0000000045BF4000 0052A8 (v02 LENOVO CB-01    00000001 INTL 20160422)
 ACPI: SSDT 0x0000000045BFA000 0025CE (v02 LENOVO CB-01    00000001 INTL 20160422)
-ACPI: SSDT 0xFFFF90C601129000 0004D4 (v02 PmRef  ApPsd    00003000 INTL 20160422)
-ACPI: SSDT 0xFFFF90C60112A800 00048A (v02 PmRef  ApCst    00003000 INTL 20160422)
-ACPI: SSDT 0xFFFF90C60112C800 000647 (v02 PmRef  Cpu0Ist  00003000 INTL 20160422)
-ACPI: SSDT 0xFFFF90C60112F000 00048A (v02 PmRef  ApHwp    00003000 INTL 20160422)
-ACPI: SSDT 0xFFFF90C601594A00 000128 (v02 PmRef  Cpu0Hwp  00003000 INTL 20160422)
-ACPI: SSDT 0xFFFF90C601596800 0001B3 (v02 PmRef  Cpu0Psd  00003000 INTL 20160422)
-ACPI: SSDT 0xFFFF90C6015A0400 000386 (v02 PmRef  Cpu0Cst  00003001 INTL 20160422)
-ACPI: SSDT 0xFFFF90C6015AE000 0008E7 (v02 PmRef  ApIst    00003000 INTL 20160422)
+ACPI: SSDT 0xFFFF973881130000 00048A (v02 PmRef  ApHwp    00003000 INTL 20160422)
+ACPI: SSDT 0xFFFF973881133000 00048A (v02 PmRef  ApCst    00003000 INTL 20160422)
+ACPI: SSDT 0xFFFF973881133800 000647 (v02 PmRef  Cpu0Ist  00003000 INTL 20160422)
+ACPI: SSDT 0xFFFF973881137000 0004D4 (v02 PmRef  ApPsd    00003000 INTL 20160422)
+ACPI: SSDT 0xFFFF97388156C600 0001B3 (v02 PmRef  Cpu0Psd  00003000 INTL 20160422)
+ACPI: SSDT 0xFFFF97388156FC00 000128 (v02 PmRef  Cpu0Hwp  00003000 INTL 20160422)
+ACPI: SSDT 0xFFFF973881572000 000386 (v02 PmRef  Cpu0Cst  00003001 INTL 20160422)
+ACPI: SSDT 0xFFFF973881579000 0008E7 (v02 PmRef  ApIst    00003000 INTL 20160422)
 ACPI: (supports S0 S3 S4 S5)
 ACPI: Thermal Zone [TZ00] (28 C)
 ACPI: TPM2 0x0000000045BDF000 00004C (v04 LENOVO CB-01    00000001 ACPI 00040000)
@@ -159,7 +159,7 @@ AES CTR mode by8 optimization enabled
 APIC: Switch to symmetric I/O mode setup
 Asymmetric key parser 'x509' registered
 audit: initializing netlink subsys (disabled)
-audit: type=2000 audit(1615534063.032:1): state=initialized audit_enabled=0 res=1
+audit: type=2000 audit(1615533955.032:1): state=initialized audit_enabled=0 res=1
 AVX2 version of gcm_enc/dec engaged.
 battery: ACPI: Battery Slot [BAT0] (battery present)
 BIOS-e820: [mem 0x0000000000000000-0x000000000009efff] usable
@@ -203,9 +203,9 @@ Bluetooth: HCI device and connection manager initialized
 Bluetooth: HCI socket layer initialized
 Bluetooth: L2CAP socket layer initialized
 Bluetooth: SCO socket layer initialized
-    BOOT_IMAGE=/boot/vmlinuz-5.10.22_1
+    BOOT_IMAGE=/boot/vmlinuz-5.11.4_1
 Booting paravirtualized kernel on bare hardware
-Btrfs loaded, crc32c=crc32c-intel
+Btrfs loaded, crc32c=crc32c-intel, zoned=yes
 Built 1 zonelists, mobility grouping on.  Total pages: 4078167
   C0000-FFFFF write-protect
 Calibrating delay loop (skipped), value calculated using timer frequency.. 5606.40 BogoMIPS (lpj=2803200)
@@ -225,7 +225,7 @@ clocksource: Switched to clocksource tsc
 clocksource: Switched to clocksource tsc-early
 clocksource: tsc-early: mask: 0xffffffffffffffff max_cycles: 0x28680fa287f, max_idle_ns: 440795281151 ns
 clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x28680fa287f, max_idle_ns: 440795281151 ns
-Command line: BOOT_IMAGE=/boot/vmlinuz-5.10.22_1 root=/dev/mapper/void-root ro loglevel=4 init_on_free=1 rd.lvm.vg=void rd.luks.uuid=ac25654b-fd85-4a4e-addc-3924c231abac resume=/dev/void/swap
+Command line: BOOT_IMAGE=/boot/vmlinuz-5.11.4_1 root=/dev/mapper/void-root ro loglevel=4 init_on_free=1 rd.lvm.vg=void rd.luks.uuid=ac25654b-fd85-4a4e-addc-3924c231abac resume=/dev/void/swap
 Console: colour dummy device 80x25
 Console: switching to colour dummy device 80x25
 Console: switching to colour frame buffer device 160x50
@@ -238,6 +238,9 @@ Dentry cache hash table entries: 2097152 (order: 12, 16777216 bytes, linear)
 device-mapper: ioctl: 4.43.0-ioctl (2020-10-01) initialised: dm-devel@redhat.com
 device-mapper: uevent: version 1.0.3
 devtmpfs: initialized
+dm-0: detected capacity change from 0 to 790119055
+dm-1: detected capacity change from 0 to 50331648
+dm-2: detected capacity change from 0 to 739778560
   DMA32    [mem 0x0000000001000000-0x00000000ffffffff]
   DMA32 zone: 269232 pages, LIFO batch:63
   DMA32 zone: 4207 pages used for memmap
@@ -275,7 +278,7 @@ dracut: rd.md.imsm=0: no MD RAID for imsm/isw raids
 dracut: Reading all physical volumes. This may take a while...
 dracut: Scanning devices dm-0  for LVM volume groups void
 dracut: Switching root
-[drm] Initialized i915 1.6.0 20200917 for 0000:00:02.0 on minor 0
+[drm] Initialized i915 1.6.0 20201103 for 0000:00:02.0 on minor 0
 e1000e: Copyright(c) 1999 - 2015 Intel Corporation.
 e1000e: Intel(R) PRO/1000 Network Driver
 e820: remove [mem 0x000a0000-0x000fffff] usable
@@ -311,23 +314,23 @@ elogind-daemon[1507]: Watching system buttons on /dev/input/event6 (Intel HID 5
 ENERGY_PERF_BIAS: Set to 'normal', was 'performance'
 esrt: Reserving ESRT space from 0x000000003f75f418 to 0x000000003f75f4a0.
 ... event mask:             0001000f000000ff
-EXT4-fs (dm-2): mounted filesystem with ordered data mode. Opts: (null)
-EXT4-fs (dm-2): re-mounted. Opts: (null)
-EXT4-fs (dm-2): re-mounted. Opts: (null)
+EXT4-fs (dm-2): mounted filesystem with ordered data mode. Opts: (null). Quota mode: none.
+EXT4-fs (dm-2): re-mounted. Opts: (null). Quota mode: none.
+EXT4-fs (dm-2): re-mounted. Opts: (null). Quota mode: none.
 Faking a node at [mem 0x0000000000000000-0x00000004b0bfffff]
 fb0: EFI VGA frame buffer device
 fb0: switching to inteldrmfb from EFI VGA
 fbcon: i915drmfb (fb0) is primary device
 fbcon: Taking over console
 ... fixed-purpose events:   4
-Freeing initrd memory: 55528K
+Freeing initrd memory: 60884K
 Freeing SMP alternatives memory: 32K
 Freeing unused kernel image (initmem) memory: 1600K
-Freeing unused kernel image (rodata/data gap) memory: 1748K
+Freeing unused kernel image (rodata/data gap) memory: 1700K
 Freeing unused kernel image (text/rodata gap) memory: 2040K
-ftrace: allocated 146 pages with 3 groups
-ftrace: allocating 37337 entries in 146 pages
-fuse: init (API version 7.32)
+ftrace: allocated 147 pages with 4 groups
+ftrace: allocating 37480 entries in 147 pages
+fuse: init (API version 7.33)
 futex hash table entries: 2048 (order: 5, 131072 bytes, linear)
 ... generic registers:      8
 hid-generic 0018:04F3:3138.0002: input,hidraw0: I2C HID v1.00 Mouse [ELAN0662:00 04F3:3138] on i2c-ELAN0662:00
@@ -359,6 +362,7 @@ i8042: PNP: PS/2 Controller [PNP0303:PS2K] at 0x60,0x64 irq 1
 i915 0000:00:02.0: [drm] Couldn't get system memory bandwidth
 i915 0000:00:02.0: [drm] fb0: i915drmfb frame buffer device
 i915 0000:00:02.0: [drm] Finished loading DMC firmware i915/tgl_dmc_ver2_08.bin (v2.8)
+i915 0000:00:02.0: [drm] Panel advertises DPCD backlight support, but VBT disagrees. If your backlight controls don't work try booting with i915.enable_dpcd_backlight=1. If your machine needs this, please file a _new_ bug report on drm/i915, see https://gitlab.freedesktop.org/drm/intel/-/wikis/How-to-file-i915-bugs for details.
 i915 0000:00:02.0: [drm] VT-d active for gfx access
 i915 0000:00:02.0: vgaarb: changed VGA decodes: olddecodes=io+mem,decodes=io+mem:owns=io+mem
 i915 0000:00:02.0: vgaarb: deactivate vga console
@@ -411,8 +415,7 @@ io scheduler mq-deadline registered
 IPI shorthand broadcast: enabled
 IPv6: ADDRCONF(NETDEV_CHANGE): wlp0s20f3: link becomes ready
 ish-hid {33AECD58-B679-4E54-9BD9-A04D34F0C226}: [hid-ish]: enum_devices_done OK, num_hid_devices=1
-iTCO_wdt: Intel TCO WatchDog Timer Driver v1.11
-iTCO_wdt: unable to reset NO_REBOOT flag, device disabled by hardware/BIOS
+iTCO_wdt iTCO_wdt: unable to reset NO_REBOOT flag, device disabled by hardware/BIOS
 iTCO_vendor_support: vendor-support=0
 iwlwifi 0000:00:14.3: api flags index 2 larger than supported by driver
 iwlwifi 0000:00:14.3: base HW address: 00:42:38:d7:c7:33
@@ -421,7 +424,7 @@ iwlwifi 0000:00:14.3: Got NSS = 4 - trimming to 2
 iwlwifi 0000:00:14.3: loaded firmware version 59.601f3a66.0 QuZ-a0-hr-b0-59.ucode op_mode iwlmvm
 iwlwifi 0000:00:14.3: TLV_FW_FSEQ_VERSION: FSEQ Version: 65.3.35.22
 iwlwifi 0000:00:14.3 wlp0s20f3: renamed from wlan0
-Kernel command line: BOOT_IMAGE=/boot/vmlinuz-5.10.22_1 root=/dev/mapper/void-root ro loglevel=4 init_on_free=1 rd.lvm.vg=void rd.luks.uuid=ac25654b-fd85-4a4e-addc-3924c231abac resume=/dev/void/swap
+Kernel command line: BOOT_IMAGE=/boot/vmlinuz-5.11.4_1 root=/dev/mapper/void-root ro loglevel=4 init_on_free=1 rd.lvm.vg=void rd.luks.uuid=ac25654b-fd85-4a4e-addc-3924c231abac resume=/dev/void/swap
 Key type asymmetric registered
 Key type dns_resolver registered
 Key type encrypted registered
@@ -435,7 +438,7 @@ last_pfn = 0x45c00 max_arch_pfn = 0x400000000
 last_pfn = 0x4b0c00 max_arch_pfn = 0x400000000
 ledtrig-cpu: registered to indicate activity on CPUs
 Linux agpgart interface v0.103
-Linux version 5.10.22_1 (voidlinux@voidlinux) (gcc (GCC) 10.2.1 20201203, GNU ld (GNU Binutils) 2.35.1) #1 SMP 1615288648
+Linux version 5.11.4_1 (voidlinux@voidlinux) (gcc (GCC) 10.2.1 20201203, GNU ld (GNU Binutils) 2.35.1) #1 SMP 1615177271
 Loading compiled-in X.509 certificates
 loop: module loaded
 LSM: Security Framework initializing
@@ -447,7 +450,7 @@ mei_me 0000:00:16.0: enabling device (0000 -> 0002)
 [mem 0x4f400000-0xfe00ffff] available for PCI devices
 mem auto-init: clearing system memory may take some time...
 mem auto-init: stack:off, heap alloc:on, heap free:on
-Memory: 16043408K/16571704K available (12295K kernel code, 3230K rwdata, 6444K rodata, 1600K init, 1688K bss, 528036K reserved, 0K cma-reserved)
+Memory: 16038052K/16571704K available (12295K kernel code, 3233K rwdata, 6492K rodata, 1600K init, 1676K bss, 533392K reserved, 0K cma-reserved)
 microcode: Microcode Update Driver: v2.2.
 microcode: sig=0x806c1, pf=0x80, revision=0x60
 Monitor-Mwait will be used to enter C-1 state
@@ -642,8 +645,8 @@ PCI: Using ACPI for IRQ routing
 PCI: Using configuration type 1 for base access
 PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug
 pcpu-alloc: [0] 0 1 2 3 4 5 6 7 
-pcpu-alloc: s184664 r8192 d32424 u262144 alloc=1*2097152
-percpu: Embedded 55 pages/cpu s184664 r8192 d32424 u262144
+pcpu-alloc: s185304 r8192 d31784 u262144 alloc=1*2097152
+percpu: Embedded 55 pages/cpu s185304 r8192 d31784 u262144
 Performance Events: PEBS fmt4+-baseline,  AnyThread deprecated, Icelake events, 32-deep LBR, full-width counters, Intel PMU driver.
 pid_max: default: 32768 minimum: 301
 pinctrl core: initialized pinctrl subsystem
@@ -678,32 +681,32 @@ printk: console [tty0] enabled
 process: using mwait in idle threads
 proc_thermal 0000:00:04.0: Creating sysfs group for PROC_THERMAL_PCI
 PTP clock support registered
-raid6: avx2x1   gen() 45958 MB/s
-raid6: avx2x1   xor() 25252 MB/s
-raid6: avx2x2   gen() 58688 MB/s
-raid6: avx2x2   xor() 32800 MB/s
-raid6: avx2x4   gen() 57689 MB/s
-raid6: avx2x4   xor() 19330 MB/s
-raid6: avx512x1 gen() 68617 MB/s
-raid6: avx512x1 xor() 39845 MB/s
-raid6: avx512x2 gen() 74293 MB/s
-raid6: avx512x2 xor() 42514 MB/s
-raid6: avx512x4 gen() 53938 MB/s
-raid6: avx512x4 xor() 16634 MB/s
-raid6: sse2x1   gen() 14992 MB/s
-raid6: sse2x1   xor()  8206 MB/s
-raid6: sse2x2   gen() 16070 MB/s
-raid6: sse2x2   xor() 10160 MB/s
-raid6: sse2x4   gen() 15414 MB/s
-raid6: sse2x4   xor()  8012 MB/s
-raid6: using algorithm avx512x2 gen() 74293 MB/s
+raid6: avx2x1   gen() 44422 MB/s
+raid6: avx2x1   xor() 25363 MB/s
+raid6: avx2x2   gen() 55378 MB/s
+raid6: avx2x2   xor() 31067 MB/s
+raid6: avx2x4   gen() 56356 MB/s
+raid6: avx2x4   xor() 19869 MB/s
+raid6: avx512x1 gen() 66187 MB/s
+raid6: avx512x1 xor() 38687 MB/s
+raid6: avx512x2 gen() 73655 MB/s
+raid6: avx512x2 xor() 41033 MB/s
+raid6: avx512x4 gen() 64026 MB/s
+raid6: avx512x4 xor() 17145 MB/s
+raid6: sse2x1   gen() 14405 MB/s
+raid6: sse2x1   xor()  7890 MB/s
+raid6: sse2x2   gen() 15852 MB/s
+raid6: sse2x2   xor()  9886 MB/s
+raid6: sse2x4   gen() 15102 MB/s
+raid6: sse2x4   xor()  7960 MB/s
+raid6: using algorithm avx512x2 gen() 73655 MB/s
 raid6: using avx512x2 recovery algorithm
-raid6: .... xor() 42514 MB/s, rmw enabled
-RAMDISK: [mem 0x3137b000-0x349b4fff]
+raid6: .... xor() 41033 MB/s, rmw enabled
+RAMDISK: [mem 0x30905000-0x34479fff]
 random: 7 urandom warning(s) missed due to ratelimiting
 random: crng init done
 random: fast init done
-random: get_random_u64 called from __kmem_cache_create+0x2e/0x540 with crng_init=0
+random: get_random_u64 called from __kmem_cache_create+0x2e/0x560 with crng_init=0
 random: systemd-udevd: uninitialized urandom read (16 bytes read)
 random: systemd-udevd: uninitialized urandom read (16 bytes read)
 random: systemd-udevd: uninitialized urandom read (16 bytes read)
@@ -723,10 +726,10 @@ RPL Segment Routing with IPv6
 rtc_cmos rtc_cmos: alarms up to one month, y3k, 114 bytes nvram
 rtc_cmos rtc_cmos: registered as rtc0
 rtc_cmos rtc_cmos: RTC can wake from S4
-rtc_cmos rtc_cmos: setting system clock to 2021-03-12T07:27:44 UTC (1615534064)
+rtc_cmos rtc_cmos: setting system clock to 2021-03-12T07:25:56 UTC (1615533956)
 	Rude variant of Tasks RCU enabled.
 Run /init as init process
-sched_clock: Marking stable (2303389720, 20027318)->(2330371199, -6954161)
+sched_clock: Marking stable (2294752116, 20027168)->(2322476588, -7697304)
 Secure boot could not be determined
 Segment Routing with IPv6
 Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
@@ -753,6 +756,8 @@ SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=8, Nodes=1
 SMBIOS 3.3.0 present.
 smpboot: Allowing 8 CPUs, 0 hotplug CPUs
 smpboot: CPU0: 11th Gen Intel(R) Core(TM) i7-1165G7 @ 2.80GHz (family: 0x6, model: 0x8c, stepping: 0x1)
+smpboot: Estimated ratio of average max frequency by base frequency (times 1024): 1499
+smpboot: Estimated ratio of average max frequency by base frequency (times 1024): 1499
 smpboot: Max logical packages: 1
 smpboot: Total of 8 processors activated (44851.20 BogoMIPS)
 smp: Bringing up secondary CPUs ...
@@ -774,13 +779,13 @@ sof-audio-pci 0000:00:1f.3: DMICs detected in NHLT tables: 2
 sof-audio-pci 0000:00:1f.3: DSP detected with PCI class/subclass/prog-if 0x040100
 sof-audio-pci 0000:00:1f.3: DSP detected with PCI class/subclass/prog-if info 0x040100
 sof-audio-pci 0000:00:1f.3: enabling device (0000 -> 0002)
-sof-audio-pci 0000:00:1f.3: Firmware: ABI 3:17:0 Kernel ABI 3:17:0
+sof-audio-pci 0000:00:1f.3: Firmware: ABI 3:17:0 Kernel ABI 3:18:0
 sof-audio-pci 0000:00:1f.3: Firmware info: version 1:6:1-53680
 sof-audio-pci 0000:00:1f.3: hda codecs found, mask 5
-sof-audio-pci 0000:00:1f.3: Topology: ABI 3:17:0 Kernel ABI 3:17:0
+sof-audio-pci 0000:00:1f.3: Topology: ABI 3:17:0 Kernel ABI 3:18:0
 sof-audio-pci 0000:00:1f.3: use msi interrupt mode
 sof-audio-pci 0000:00:1f.3: using HDA machine driver skl_hda_dsp_generic now
-software IO TLB: mapped [mem 0x000000002d37b000-0x000000003137b000] (64MB)
+software IO TLB: mapped [mem 0x000000002c905000-0x0000000030905000] (64MB)
 Spectre V1 : Mitigation: usercopy/swapgs barriers and __user pointer sanitization
 Spectre V2 : mitigation: Enabling conditional Indirect Branch Prediction Barrier
 Spectre V2 : Mitigation: Enhanced IBRS
@@ -814,7 +819,7 @@ system 00:04: Plug and Play ACPI device, IDs PNP0c02 (active)
 system 00:05: [io  0x2000-0x20fe] has been reserved
 system 00:05: Plug and Play ACPI device, IDs PNP0c02 (active)
 system 00:06: Plug and Play ACPI device, IDs PNP0c02 (active)
-systemd-udevd[358]: starting version 3.2.9
+systemd-udevd[361]: starting version 3.2.9
 TCP bind hash table entries: 65536 (order: 8, 1048576 bytes, linear)
 TCP established hash table entries: 131072 (order: 8, 1048576 bytes, linear)
 TCP: Hash tables configured (established 131072 bind 65536)
@@ -834,11 +839,11 @@ TSC deadline timer available
 tsc: Detected 2800.000 MHz processor
 tsc: Detected 2803.200 MHz TSC
 tun: Universal TUN/TAP device driver, 1.6
-udevd[1238]: starting eudev-3.2.9
-udevd[1238]: starting version 3.2.9
-udevd[359]: starting eudev-3.2.9
-udevd[812]: starting version 3.2.9
-udevd[813]: starting eudev-3.2.9
+udevd[1245]: starting eudev-3.2.9
+udevd[1245]: starting version 3.2.9
+udevd[362]: starting eudev-3.2.9
+udevd[816]: starting version 3.2.9
+udevd[817]: starting eudev-3.2.9
 UDP hash table entries: 8192 (order: 6, 262144 bytes, linear)
 UDP-Lite hash table entries: 8192 (order: 6, 262144 bytes, linear)
 usb 3-10: new full-speed USB device number 3 using xhci_hcd
@@ -856,23 +861,23 @@ usbcore: registered new interface driver hub
 usbcore: registered new interface driver usbfs
 usbcore: registered new interface driver uvcvideo
 usb: port power management may be unreliable
-usb usb1: Manufacturer: Linux 5.10.22_1 xhci-hcd
-usb usb1: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.10
+usb usb1: Manufacturer: Linux 5.11.4_1 xhci-hcd
+usb usb1: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.11
 usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
 usb usb1: Product: xHCI Host Controller
 usb usb1: SerialNumber: 0000:00:0d.0
-usb usb2: Manufacturer: Linux 5.10.22_1 xhci-hcd
-usb usb2: New USB device found, idVendor=1d6b, idProduct=0003, bcdDevice= 5.10
+usb usb2: Manufacturer: Linux 5.11.4_1 xhci-hcd
+usb usb2: New USB device found, idVendor=1d6b, idProduct=0003, bcdDevice= 5.11
 usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
 usb usb2: Product: xHCI Host Controller
 usb usb2: SerialNumber: 0000:00:0d.0
-usb usb3: Manufacturer: Linux 5.10.22_1 xhci-hcd
-usb usb3: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.10
+usb usb3: Manufacturer: Linux 5.11.4_1 xhci-hcd
+usb usb3: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.11
 usb usb3: New USB device strings: Mfr=3, Product=2, SerialNumber=1
 usb usb3: Product: xHCI Host Controller
 usb usb3: SerialNumber: 0000:00:14.0
-usb usb4: Manufacturer: Linux 5.10.22_1 xhci-hcd
-usb usb4: New USB device found, idVendor=1d6b, idProduct=0003, bcdDevice= 5.10
+usb usb4: Manufacturer: Linux 5.11.4_1 xhci-hcd
+usb usb4: New USB device found, idVendor=1d6b, idProduct=0003, bcdDevice= 5.11
 usb usb4: New USB device strings: Mfr=3, Product=2, SerialNumber=1
 usb usb4: Product: xHCI Host Controller
 usb usb4: SerialNumber: 0000:00:14.0
@@ -919,14 +924,12 @@ x86/mm: Checked W+X mappings: passed, no W+X pages found.
 x86/mm: Memory block size: 128MB
 x86/PAT: Configuration [0-7]: WB  WC  UC- UC  WB  WP  UC- WT  
 x86/split lock detection: warning about user-space split_locks
-xhci_hcd 0000:00:0d.0: cache line size of 64 is not supported
 xhci_hcd 0000:00:0d.0: hcc params 0x20007fc1 hci version 0x120 quirks 0x0000000200009810
 xhci_hcd 0000:00:0d.0: Host supports USB 3.1 Enhanced SuperSpeed
 xhci_hcd 0000:00:0d.0: new USB bus registered, assigned bus number 1
 xhci_hcd 0000:00:0d.0: new USB bus registered, assigned bus number 2
 xhci_hcd 0000:00:0d.0: xHCI Host Controller
 xhci_hcd 0000:00:0d.0: xHCI Host Controller
-xhci_hcd 0000:00:14.0: cache line size of 64 is not supported
 xhci_hcd 0000:00:14.0: hcc params 0x20007fc1 hci version 0x120 quirks 0x0000000000009810
 xhci_hcd 0000:00:14.0: Host supports USB 3.1 Enhanced SuperSpeed
 xhci_hcd 0000:00:14.0: new USB bus registered, assigned bus number 3
```

Re: Regression in Linux5.11? 4k resolution over displayport missing.

[dkwo]

[-- Attachment #1: Type: text/plain, Size: 395 bytes --]

New comment by dkwo on void-packages repository

https://github.com/void-linux/void-packages/issues/29394#issuecomment-797401681

Comment:
It works fine for me.
I only use DP though, not USB-C.
```
DP-2-2 connected 3840x2160+0+0 (normal left inverted right x axis y axis) 597mm x 336mm
3840x2160     60.00*+  29.56
$ xuname
Void 5.11.6_1 x86_64-musl GenuineIntel uptodate hold rrnFFF
```

Re: Regression in Linux5.11? 4k resolution over displayport missing.

[adriangoransson]

[-- Attachment #1: Type: text/plain, Size: 259 bytes --]

New comment by adriangoransson on void-packages repository

https://github.com/void-linux/void-packages/issues/29394#issuecomment-798422056

Comment:
I envy you @dkwo! Unfortunately, the issue is still prevalent for me on 5.11.6 as well as on Wayland (Sway).

Re: Regression in Linux5.11? 4k resolution over displayport missing.

[marmeladema]

[-- Attachment #1: Type: text/plain, Size: 410 bytes --]

New comment by marmeladema on void-packages repository

https://github.com/void-linux/void-packages/issues/29394#issuecomment-799811928

Comment:
I am using a DELL U2520D external monitor connected through USB Type-C and I think I am encountering the exact same issue.
With linux5.10 my maximum resolution is  2560x1440 / 60Hz
And with linux5.11 its capped at 2048x1080 / 30Hz and is kind of slow / blurry

Re: Regression in Linux5.11? 4k resolution over displayport missing.

[marmeladema]

[-- Attachment #1: Type: text/plain, Size: 11424 bytes --]

New comment by marmeladema on void-packages repository

https://github.com/void-linux/void-packages/issues/29394#issuecomment-799817821

Comment:
On my side, I can see errors like the following in dmesg:
```
[   24.729180] ------------[ cut here ]------------
[   24.729182] i915 0000:00:02.0: drm_WARN_ON(!intel_dp->num_source_rates || !intel_dp->num_sink_rates)
[   24.729216] WARNING: CPU: 5 PID: 1745 at drivers/gpu/drm/i915/display/intel_dp.c:417 intel_dp_set_common_rates+0x50/0x160 [i915]
[   24.729254] Modules linked in: ctr ccm xt_conntrack xt_MASQUERADE nf_conntrack_netlink nfnetlink xfrm_user xfrm_algo xt_addrtype iptable_filter iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ip_tables x_tables br_netfilter bridge stp llc overlay nls_iso8859_1 nls_cp437 vfat fat tpm_crb snd_usb_audio snd_usbmidi_lib snd_rawmidi uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_common videodev mc btusb btrtl btbcm btintel joydev snd_hda_codec_hdmi hid_multitouch snd_hda_codec_realtek snd_sof_pci snd_sof_intel_byt snd_hda_codec_generic snd_sof_intel_hda_common snd_sof_intel_hda snd_sof_intel_ipc snd_sof snd_sof_xtensa_dsp snd_soc_hdac_hda snd_hda_ext_core snd_soc_acpi_intel_match snd_soc_acpi ledtrig_audio iwlmvm snd_hda_intel snd_intel_dspcfg soundwire_intel soundwire_generic_allocation soundwire_cadence snd_hda_codec x86_pkg_temp_thermal snd_hda_core intel_powerclamp coretemp mac80211 snd_hwdep libarc4 kvm_intel iTCO_wdt intel_pmc_bxt
[   24.729288]  i2c_designware_platform soundwire_bus 8250_dw iTCO_vendor_support i2c_designware_core iwlwifi intel_rapl_msr kvm snd_soc_core snd_compress irqbypass snd_pcm_dmaengine rapl intel_cstate psmouse pcspkr cfg80211 input_leds snd_pcm i2c_i801 ac97_bus processor_thermal_device i2c_smbus processor_thermal_rfim intel_soc_dts_iosf processor_thermal_mbox intel_lpss_pci processor_thermal_rapl intel_lpss intel_rapl_common idma64 int340x_thermal_zone intel_pch_thermal virt_dma tpm_tis tpm_tis_core evdev mac_hid intel_hid ac system76_acpi sparse_keymap tiny_power_button snd_seq snd_seq_device snd_timer snd soundcore vhost_vsock vmw_vsock_virtio_transport_common vsock vhost_net vhost vhost_iotlb tap uhid hci_vhci bluetooth ecdh_generic rfkill ecc vfio_iommu_type1 vfio uinput userio ppp_generic slhc tun loop nvram cuse fuse ext4 crc16 mbcache jbd2 usbmouse dm_crypt encrypted_keys trusted tpm rng_core hid_generic usbkbd usbhid i915 rtsx_pci_sdmmc mmc_core intel_gtt i2c_algo_bit
[   24.729326]  drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops cec crct10dif_pclmul crc32_pclmul ghash_clmulni_intel xhci_pci rc_core xhci_pci_renesas xhci_hcd aesni_intel drm crypto_simd cryptd glue_helper usbcore serio_raw rtsx_pci i2c_hid agpgart hid battery video pinctrl_cannonlake button dm_mirror dm_region_hash dm_log dm_mod btrfs blake2b_generic xor raid6_pq libcrc32c crc32c_generic crc32c_intel
[   24.729344] CPU: 5 PID: 1745 Comm: Xorg Tainted: G        W         5.11.6_1 #1
[   24.729346] Hardware name: System76 Lemur Pro/Lemur Pro, BIOS 2021-01-19_d6d37c0 01/19/2021
[   24.729347] RIP: 0010:intel_dp_set_common_rates+0x50/0x160 [i915]
[   24.729375] Code: 8b 6f 50 4d 85 ed 0f 84 20 01 00 00 e8 e9 a9 d6 c2 48 c7 c1 30 ff 92 c0 4c 89 ea 48 c7 c7 f5 ab 94 c0 48 89 c6 e8 51 c6 03 c3 <0f> 0b 44 8b 45 78 8b 7d 68 4c 8b 55 70 4c 8d 9d a4 00 00 00 4c 8d
[   24.729377] RSP: 0018:ffffb5d380e23bb8 EFLAGS: 00010286
[   24.729378] RAX: 0000000000000000 RBX: ffff9c430a152140 RCX: ffff9c4c36558b48
[   24.729379] RDX: 00000000ffffffd8 RSI: 0000000000000027 RDI: ffff9c4c36558b40
[   24.729380] RBP: ffff9c430a152140 R08: 0000000000000000 R09: ffffb5d380e239f0
[   24.729381] R10: ffffb5d380e239e8 R11: ffffffff84828a28 R12: ffff9c430c910000
[   24.729382] R13: ffff9c4301305620 R14: ffff9c430a152000 R15: ffff9c4303592000
[   24.729383] FS:  00007f954caad900(0000) GS:ffff9c4c36540000(0000) knlGS:0000000000000000
[   24.729384] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   24.729385] CR2: 000055765e45daa8 CR3: 00000001079ea005 CR4: 00000000003706e0
[   24.729387] Call Trace:
[   24.729389]  intel_dp_get_dpcd+0xac/0xc0 [i915]
[   24.729416]  intel_dp_detect+0x3ee/0x680 [i915]
[   24.729441]  ? drm_modeset_lock+0x48/0x100 [drm]
[   24.729452]  drm_helper_probe_detect+0x49/0xa0 [drm_kms_helper]
[   24.729458]  drm_helper_probe_single_connector_modes+0x629/0x800 [drm_kms_helper]
[   24.729463]  drm_mode_getconnector+0x3a7/0x410 [drm]
[   24.729474]  ? _cond_resched+0x16/0x40
[   24.729476]  ? drm_connector_property_set_ioctl+0x60/0x60 [drm]
[   24.729486]  drm_ioctl_kernel+0xaa/0xf0 [drm]
[   24.729493]  drm_ioctl+0x20f/0x3a0 [drm]
[   24.729498]  ? drm_connector_property_set_ioctl+0x60/0x60 [drm]
[   24.729508]  __x64_sys_ioctl+0x83/0xb0
[   24.729511]  do_syscall_64+0x33/0x40
[   24.729513]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   24.729515] RIP: 0033:0x7f954d06e1b7
[   24.729517] Code: 3c 1c 48 f7 d8 49 39 c4 72 b9 e8 24 ff ff ff 85 c0 78 be 4c 89 e0 5b 5d 41 5c c3 0f 1f 84 00 00 00 00 00 b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 89 9c 0c 00 f7 d8 64 89 01 48
[   24.729518] RSP: 002b:00007ffd1fcdaca8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[   24.729520] RAX: ffffffffffffffda RBX: 00007ffd1fcdacf0 RCX: 00007f954d06e1b7
[   24.729521] RDX: 00007ffd1fcdacf0 RSI: 00000000c05064a7 RDI: 000000000000000d
[   24.729522] RBP: 00000000c05064a7 R08: 0000000000000007 R09: 0000000000000280
[   24.729522] R10: 00007ffd1fd1c080 R11: 0000000000000246 R12: 00007f954ac87000
[   24.729523] R13: 000000000000000d R14: 00000000c05064a7 R15: 000055765e46e250
[   24.729525] ---[ end trace dbc400c528c7468d ]---
[   24.729526] ------------[ cut here ]------------
[   24.729526] i915 0000:00:02.0: drm_WARN_ON(intel_dp->num_common_rates == 0)
[   24.729542] WARNING: CPU: 5 PID: 1745 at drivers/gpu/drm/i915/display/intel_dp.c:427 intel_dp_set_common_rates+0x138/0x160 [i915]
[   24.729569] Modules linked in: ctr ccm xt_conntrack xt_MASQUERADE nf_conntrack_netlink nfnetlink xfrm_user xfrm_algo xt_addrtype iptable_filter iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ip_tables x_tables br_netfilter bridge stp llc overlay nls_iso8859_1 nls_cp437 vfat fat tpm_crb snd_usb_audio snd_usbmidi_lib snd_rawmidi uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_common videodev mc btusb btrtl btbcm btintel joydev snd_hda_codec_hdmi hid_multitouch snd_hda_codec_realtek snd_sof_pci snd_sof_intel_byt snd_hda_codec_generic snd_sof_intel_hda_common snd_sof_intel_hda snd_sof_intel_ipc snd_sof snd_sof_xtensa_dsp snd_soc_hdac_hda snd_hda_ext_core snd_soc_acpi_intel_match snd_soc_acpi ledtrig_audio iwlmvm snd_hda_intel snd_intel_dspcfg soundwire_intel soundwire_generic_allocation soundwire_cadence snd_hda_codec x86_pkg_temp_thermal snd_hda_core intel_powerclamp coretemp mac80211 snd_hwdep libarc4 kvm_intel iTCO_wdt intel_pmc_bxt
[   24.729595]  i2c_designware_platform soundwire_bus 8250_dw iTCO_vendor_support i2c_designware_core iwlwifi intel_rapl_msr kvm snd_soc_core snd_compress irqbypass snd_pcm_dmaengine rapl intel_cstate psmouse pcspkr cfg80211 input_leds snd_pcm i2c_i801 ac97_bus processor_thermal_device i2c_smbus processor_thermal_rfim intel_soc_dts_iosf processor_thermal_mbox intel_lpss_pci processor_thermal_rapl intel_lpss intel_rapl_common idma64 int340x_thermal_zone intel_pch_thermal virt_dma tpm_tis tpm_tis_core evdev mac_hid intel_hid ac system76_acpi sparse_keymap tiny_power_button snd_seq snd_seq_device snd_timer snd soundcore vhost_vsock vmw_vsock_virtio_transport_common vsock vhost_net vhost vhost_iotlb tap uhid hci_vhci bluetooth ecdh_generic rfkill ecc vfio_iommu_type1 vfio uinput userio ppp_generic slhc tun loop nvram cuse fuse ext4 crc16 mbcache jbd2 usbmouse dm_crypt encrypted_keys trusted tpm rng_core hid_generic usbkbd usbhid i915 rtsx_pci_sdmmc mmc_core intel_gtt i2c_algo_bit
[   24.729626]  drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops cec crct10dif_pclmul crc32_pclmul ghash_clmulni_intel xhci_pci rc_core xhci_pci_renesas xhci_hcd aesni_intel drm crypto_simd cryptd glue_helper usbcore serio_raw rtsx_pci i2c_hid agpgart hid battery video pinctrl_cannonlake button dm_mirror dm_region_hash dm_log dm_mod btrfs blake2b_generic xor raid6_pq libcrc32c crc32c_generic crc32c_intel
[   24.729640] CPU: 5 PID: 1745 Comm: Xorg Tainted: G        W         5.11.6_1 #1
[   24.729642] Hardware name: System76 Lemur Pro/Lemur Pro, BIOS 2021-01-19_d6d37c0 01/19/2021
[   24.729642] RIP: 0010:intel_dp_set_common_rates+0x138/0x160 [i915]
[   24.729668] Code: 4c 8b 67 50 4d 85 e4 75 03 4c 8b 27 e8 01 a9 d6 c2 48 c7 c1 78 ff 92 c0 4c 89 e2 48 c7 c7 f5 ab 94 c0 48 89 c6 e8 69 c5 03 c3 <0f> 0b 48 b8 01 00 00 00 d0 78 02 00 5b 48 89 85 a0 00 00 00 5d 41
[   24.729669] RSP: 0018:ffffb5d380e23bb8 EFLAGS: 00010286
[   24.729670] RAX: 0000000000000000 RBX: ffff9c430a152140 RCX: ffff9c4c36558b48
[   24.729671] RDX: 00000000ffffffd8 RSI: 0000000000000027 RDI: ffff9c4c36558b40
[   24.729672] RBP: ffff9c430a152140 R08: 0000000000000000 R09: ffffb5d380e239f0
[   24.729672] R10: ffffb5d380e239e8 R11: ffffffff84828a28 R12: ffff9c4301305620
[   24.729673] R13: ffff9c4301305620 R14: ffff9c430a152000 R15: ffff9c4303592000
[   24.729674] FS:  00007f954caad900(0000) GS:ffff9c4c36540000(0000) knlGS:0000000000000000
[   24.729675] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   24.729676] CR2: 000055765e45daa8 CR3: 00000001079ea005 CR4: 00000000003706e0
[   24.729677] Call Trace:
[   24.729678]  intel_dp_get_dpcd+0xac/0xc0 [i915]
[   24.729703]  intel_dp_detect+0x3ee/0x680 [i915]
[   24.729727]  ? drm_modeset_lock+0x48/0x100 [drm]
[   24.729737]  drm_helper_probe_detect+0x49/0xa0 [drm_kms_helper]
[   24.729741]  drm_helper_probe_single_connector_modes+0x629/0x800 [drm_kms_helper]
[   24.729746]  drm_mode_getconnector+0x3a7/0x410 [drm]
[   24.729756]  ? _cond_resched+0x16/0x40
[   24.729758]  ? drm_connector_property_set_ioctl+0x60/0x60 [drm]
[   24.729768]  drm_ioctl_kernel+0xaa/0xf0 [drm]
[   24.729774]  drm_ioctl+0x20f/0x3a0 [drm]
[   24.729779]  ? drm_connector_property_set_ioctl+0x60/0x60 [drm]
[   24.729789]  __x64_sys_ioctl+0x83/0xb0
[   24.729791]  do_syscall_64+0x33/0x40
[   24.729792]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   24.729794] RIP: 0033:0x7f954d06e1b7
[   24.729795] Code: 3c 1c 48 f7 d8 49 39 c4 72 b9 e8 24 ff ff ff 85 c0 78 be 4c 89 e0 5b 5d 41 5c c3 0f 1f 84 00 00 00 00 00 b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 89 9c 0c 00 f7 d8 64 89 01 48
[   24.729796] RSP: 002b:00007ffd1fcdaca8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[   24.729798] RAX: ffffffffffffffda RBX: 00007ffd1fcdacf0 RCX: 00007f954d06e1b7
[   24.729799] RDX: 00007ffd1fcdacf0 RSI: 00000000c05064a7 RDI: 000000000000000d
[   24.729799] RBP: 00000000c05064a7 R08: 0000000000000007 R09: 0000000000000280
[   24.729800] R10: 00007ffd1fd1c080 R11: 0000000000000246 R12: 00007f954ac87000
[   24.729801] R13: 000000000000000d R14: 00000000c05064a7 R15: 000055765e46e250
[   24.729802] ---[ end trace dbc400c528c7468e ]---
[   25.497907] usb 2-2.3: current rate 16000 is different from the runtime rate 48000
[   25.511928] usb 2-2.3: current rate 16000 is different from the runtime rate 48000
[   25.522907] usb 2-2.3: current rate 16000 is different from the runtime rate 48000
```

Re: Regression in Linux5.11? 4k resolution over displayport missing.

[marmeladema]

[-- Attachment #1: Type: text/plain, Size: 245 bytes --]

New comment by marmeladema on void-packages repository

https://github.com/void-linux/void-packages/issues/29394#issuecomment-811451903

Comment:
I have opened an issue in drm-intel gitlab: https://gitlab.freedesktop.org/drm/intel/-/issues/3358

Re: Regression in Linux5.11? 4k resolution over displayport missing.

[marmeladema]

[-- Attachment #1: Type: text/plain, Size: 333 bytes --]

New comment by marmeladema on void-packages repository

https://github.com/void-linux/void-packages/issues/29394#issuecomment-812186967

Comment:
It tested linux5.12-rc5 and the issue seems fixed. Probably thanked to https://patchwork.kernel.org/project/intel-gfx/list/?series=450261 which will get backported to 5.11 at some point.

Re: Regression in Linux5.11? 4k resolution over displayport missing.

[ericonr]

[-- Attachment #1: Type: text/plain, Size: 343 bytes --]

New comment by ericonr on void-packages repository

https://github.com/void-linux/void-packages/issues/29394#issuecomment-812228352

Comment:
@marmeladema would you be up to sending a backport request to kernel, if it hasn't been backported yet? Given that fedora backported it locally, idk if they pushed for it in kernel upstream as well :/

Re: Regression in Linux5.11? 4k resolution over displayport missing.

[ericonr]

[-- Attachment #1: Type: text/plain, Size: 170 bytes --]

New comment by ericonr on void-packages repository

https://github.com/void-linux/void-packages/issues/29394#issuecomment-847466971

Comment:
Hopefully fixed with #30915

Re: [ISSUE] [CLOSED] Regression in Linux5.11? 4k resolution over displayport missing.

[ericonr]

[-- Attachment #1: Type: text/plain, Size: 2294 bytes --]

Closed issue by adriangoransson on void-packages repository

https://github.com/void-linux/void-packages/issues/29394

Description:
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Hi! and apologies if this is nowhere near the correct forum to ask this (where might that be?). I noticed that upon upgrading to Linux5.11 from 5.10 that I could no longer use the maximum resolution of my external monitor. I can confirm that it does work on 5.9 and 5.10 (although for 5.10 it didn't once after a point upgrade so it seems a bit flaky).
### System

* xuname:
`Void 5.11.4_1 x86_64 GenuineIntel uptodate rFFF`
* packages: I don't know what may be the culprit so here's a bunch of them!
`linux5.11-5.11.4_1` (incl. headers)
`linux-firmware-intel-20210208_2`
`intel-media-driver-20.4.5_1`
`xf86-video-intel-2.99.917.20200515_1`
The same configuration works just fine on older kernels: `linux5.10-5.10.22_1` and `linux5.9-5.9.16_1`.
* /proc/cmdline if that is helpful
`BOOT_IMAGE=/boot/vmlinuz-5.11.4_1 root=/dev/mapper/void-root ro loglevel=4 init_on_free=1 rd.lvm.vg=void rd.luks.uuid=<uuid> resume=/dev/void/swap`

### Expected behavior
Using `xrandr`, the full resolution (3840x2160) of my external monitor should be visible.
This is how it looks on linux5.10-5.10.22_1.
```sh
xrandr
# snip
DP3 connected primary 3840x2160+0+0 (normal left inverted right x axis y axis) 600mm x 340mm
   3840x2160     60.00*+
   2560x1440     59.95  
   1920x1200     59.88  
   1920x1080     60.00    60.00    50.00    59.94    24.00    23.98  
   1920x1080i    60.00    50.00    59.94
# more output modes...
```

### Actual behavior
```sh
xrandr
# snip
DP3 connected (normal left inverted right x axis y axis)
   2560x1440     59.95  
   1920x1200     59.88  
   1920x1080     60.00    60.00    50.00    59.94    24.00    23.98  
   1920x1080i    60.00    50.00    59.94  
# more output modes...
```

### Steps to reproduce the behavior
Boot Linux5.11 and try to set the monitor resolution.
I have a laptop with a Intel Tiger Lake 1165G7 processor with integrated graphics. It is connected to a Dell P2715Q with Displayport over USB-C.

Re: Regression in Linux5.11? 4k resolution over displayport missing.

[adriangoransson]

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New comment by adriangoransson on void-packages repository

https://github.com/void-linux/void-packages/issues/29394#issuecomment-847636984

Comment:
Great! Thanks @marmeladema and @ericonr for your hard work. It's very much appreciated!
I just upgraded linux5.11-5.11.22_1 -> linux5.12-5.12.6_1 and all available modes are shown again.