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Sun, 22 Nov 2020 02:48:21 -0800 (PST) MIME-Version: 1.0 Received: by 2002:a17:906:ccd5:0:0:0:0 with HTTP; Sun, 22 Nov 2020 02:48:20 -0800 (PST) In-Reply-To: References: From: hiro <23hiro@gmail.com> Date: Sun, 22 Nov 2020 11:48:20 +0100 Message-ID: Subject: Re: [9fans] Raspberry Pi 4 stability dependent in RAM To: 9fans <9fans@9fans.net> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Topicbox-Policy-Reasoning: allow: sender is a member Topicbox-Message-UUID: 4099fcc8-2cb0-11eb-a5de-9412a8131fb0 Archived-At: =?UTF-8?B?PGh0dHBzOi8vOWZhbnMudG9waWNib3guY29tL2dyb3Vwcy85?= =?UTF-8?B?ZmFucy9UZTkxMzc3MjIzNDUzYjhjMC1NMzIwNmJkODc4ZjQ0NGY0MDZlMGZi?= =?UTF-8?B?OTI3Pg==?= List-Help: List-Id: "9fans" <9fans.9fans.net> List-Post: List-Software: Topicbox v0 List-Subscribe: Precedence: list Reply-To: 9fans <9fans@9fans.net> List-Unsubscribe: , Topicbox-Delivery-ID: 2:9fans:437d30aa-c441-11e9-8a57-d036212d11b0:522be890-2105-11eb-b15e-8d699134e1fa:M3206bd878f444f406e0fb927:1:CdVjbFEnA1m0KeP7cNW-NxFWQ9ykGNsB6CJP25aIxWE i should not have said anything [11561053.235151] xhci_hcd 0000:01:00.0: @000000001ed0c6e0 00000000 00000000 0e000000 02048000 [11572206.218075] Under-voltage detected! (0x00050005) [11572207.738154] bcmgenet fd580000.genet eth0: Link is Down [11572211.898285] bcmgenet fd580000.genet eth0: Link is Up - 1Gbps/Full - flow control off [11572212.458226] Voltage normalised (0x00000000) [11585621.202242] xhci_hcd 0000:01:00.0: ERROR Transfer event for disabled endpoint slot 2 ep 3 gonna move back to my seagate dockstar (kirkwood) for this thing :( at least then the rpi is free for a stateless 9front terminal again (easier to reboot when there's problems like the above :() On 11/14/20, hiro <23hiro@gmail.com> wrote: > well they have FCC compliance, so i'd hope it's just internal > interference due to lack of rf separation on the board. unless the fcc > test is so busted that they were able to activate a less-problematic > pixel clock and never tried the full possible range? :D > > since i don't have a github account i don't think they will listen to > me about my issues with the device. > > but anyway they should hire an RF engineer and not me. if they tried > the common combinations at all they should have noticed themselves, no > ? > > i have been using 4k@60hz when i experienced my problem, bluetooth > cannot be switched to 5ghz. > > i'm just happy it works at all, i was just gonna return it otherwise > like i did with the earlier rpi version. don't have time to make > bug-wishlists for future raspberry christmas trees (took them 8 years > already to make the first rpi with working ethernet+usb). > > On 11/14/20, Bakul Shah wrote: >> There were reports of 2560x1440 res generating RF noise in the 2.4GHz >> band >> wifi channel 1. The proposed solution (by Eben Upton) was to use channel >> 4 >> or higher or use 5GHz wifi band at this res. And supposedly there is a >> firmware fix for this. No idea about the bluetooth issue. You should >> report >> these issues either on their forum or one of their github repos. >> >>> On Nov 14, 2020, at 7:14 AM, hiro <23hiro@gmail.com> wrote: >>> >>> =EF=BB=BFwell, for me hdmi reliably stops working when i turn on the bl= uetooth >>> keyboard and versa. >>> clearly RF interference was none of their concern when they made this >>> chip. >>> if your monitor suggests a different pixel clock you might get lucky >>> and it's just good enough, but your signal quality is gonna suffer no >>> matter what ------------------------------------------ 9fans: 9fans Permalink: https://9fans.topicbox.com/groups/9fans/Te91377223453b8c0-M3206b= d878f444f406e0fb927 Delivery options: https://9fans.topicbox.com/groups/9fans/subscription