* [ISSUE] Default x86_64 kernel allows only 4 serial ports.
@ 2024-03-30 1:38 wb4kdi
2024-03-30 1:44 ` [ISSUE] [CLOSED] " wb4kdi
2024-03-30 1:44 ` wb4kdi
0 siblings, 2 replies; 3+ messages in thread
From: wb4kdi @ 2024-03-30 1:38 UTC (permalink / raw)
To: ml
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New issue by wb4kdi on void-packages repository
https://github.com/void-linux/void-packages/issues/49598
Description:
### Is this a new report?
Yes
### System Info
Void 6.6.22 x86_64 Glibc
### Package(s) Affected
linux6.6
### Does a report exist for this bug with the project's home (upstream) and/or another distro?
Ubuntu kernel : Serial: 8250/16550 driver, 32 ports, IRQ sharing enabled
### Expected behaviour
in dmesg: Serial: 8250/16550 driver, 32 ports, IRQ sharing enabled
### Actual behaviour
in dmesg: Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
### Steps to reproduce
Install a 4 or 8 port PCIe serial card to use for process control. Can use only the first four or only 3 if the system includes a legacy serial device.
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [ISSUE] [CLOSED] Default x86_64 kernel allows only 4 serial ports.
2024-03-30 1:38 [ISSUE] Default x86_64 kernel allows only 4 serial ports wb4kdi
@ 2024-03-30 1:44 ` wb4kdi
2024-03-30 1:44 ` wb4kdi
1 sibling, 0 replies; 3+ messages in thread
From: wb4kdi @ 2024-03-30 1:44 UTC (permalink / raw)
To: ml
[-- Attachment #1: Type: text/plain, Size: 765 bytes --]
Closed issue by wb4kdi on void-packages repository
https://github.com/void-linux/void-packages/issues/49598
Description:
### Is this a new report?
Yes
### System Info
Void 6.6.22 x86_64 Glibc
### Package(s) Affected
linux6.6
### Does a report exist for this bug with the project's home (upstream) and/or another distro?
Ubuntu kernel : Serial: 8250/16550 driver, 32 ports, IRQ sharing enabled
### Expected behaviour
in dmesg: Serial: 8250/16550 driver, 32 ports, IRQ sharing enabled
### Actual behaviour
in dmesg: Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
### Steps to reproduce
Install a 4 or 8 port PCIe serial card to use for process control. Can use only the first four or only 3 if the system includes a legacy serial device.
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Default x86_64 kernel allows only 4 serial ports.
2024-03-30 1:38 [ISSUE] Default x86_64 kernel allows only 4 serial ports wb4kdi
2024-03-30 1:44 ` [ISSUE] [CLOSED] " wb4kdi
@ 2024-03-30 1:44 ` wb4kdi
1 sibling, 0 replies; 3+ messages in thread
From: wb4kdi @ 2024-03-30 1:44 UTC (permalink / raw)
To: ml
[-- Attachment #1: Type: text/plain, Size: 552 bytes --]
New comment by wb4kdi on void-packages repository
https://github.com/void-linux/void-packages/issues/49598#issuecomment-2027865707
Comment:
The limit of 4 "legacy" serial ports is archaic and really no longer applies to modern 64 bit systems. Kernel config entries CONFIG_SERIAL_8250_NR_UARTS=48 and
CONFIG_SERIAL_8250_RUNTIME_UARTS=32 is what is used for Ubuntu. The user can change the limit of available RUNTIME serial ports with the 8250.nr_uarts=x kernel variable. nr_uarts cannot be more than the max set with CONFIG_SERIAL_8250_NR_UARTS.
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2024-03-30 1:44 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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2024-03-30 1:38 [ISSUE] Default x86_64 kernel allows only 4 serial ports wb4kdi
2024-03-30 1:44 ` [ISSUE] [CLOSED] " wb4kdi
2024-03-30 1:44 ` wb4kdi
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