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Re: Screen goes blank for 1-2 seconds

From Vincent Lefevre <vincent@vinc17.net>
Newsgroups linux.debian.user
Subject Re: Screen goes blank for 1-2 seconds
Date 2022-01-27 11:50 +0100
Message-ID <DKavL-6HS-1@gated-at.bofh.it> (permalink)
References <DK4JH-2SL-1@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On 2022-01-27 10:05:16 +0530, Pankaj Jangid wrote:
> Since I have setup a new hardware - x570 chipset, rx570 GPU - I am
> facing a very strange problem. The monitor goes blank for a brief time,
> like 1-2s and then comes back. It is connected with the GPU using HDMI
> cable.

I had a similar problem in 2009 with a monitor connected via HDMI to
a Power Mac (not under Linux). This first happened from time to time,
then much more often, i.e. every day. IIRC, there was no issue when
later, this monitor was connected to a Debian laptop via VGA. I sold
the monitor to someone else (and told him about this problem), and he
confirmed the problem with his machine.

So it could be a hardware problem, with this monitor or something
else, possibly specific to HDMI.

I suggest that you try with another machine, another cable, etc. if
possible. Or the same machine with another monitor.

> During that 1-2s, the machine response is fine. Whatever I type during
> that time goes there as input, and visible when the monitor comes back.
> 
> I don’t want to file any bug report till I have some concrete data. So
> my question is - how do I diagnose such an issue and produce some data
> for debugging. So that I can hand it over to maintainers.

You might get messages in the /var/log/Xorg.0.log file if you're using X.

BTW, with my setup, I regularly get disconnected/connected messages
with 1-2 seconds delay, such as:

[166285.233] (--) NVIDIA(GPU-0): DFP-4: disconnected
[166285.233] (--) NVIDIA(GPU-0): DFP-4: Internal DisplayPort
[166285.233] (--) NVIDIA(GPU-0): DFP-4: 960.0 MHz maximum pixel clock
[166285.233] (--) NVIDIA(GPU-0): 
[166286.614] (--) NVIDIA(GPU-0): Samsung U32J59x (DFP-4): connected
[166286.614] (--) NVIDIA(GPU-0): Samsung U32J59x (DFP-4): Internal DisplayPort
[166286.614] (--) NVIDIA(GPU-0): Samsung U32J59x (DFP-4): 960.0 MHz maximum pixel clock
[166286.614] (--) NVIDIA(GPU-0): 

I have 2 external monitors, this one connected via HDMI and another
one connected via DisplayPort (no messages in Xorg.0.log for this
other monitor). But I have never noticed any blank time with either
monitor. That's strange.

-- 
Vincent Lefèvre <vincent@vinc17.net> - Web: <https://www.vinc17.net/>
100% accessible validated (X)HTML - Blog: <https://www.vinc17.net/blog/>
Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)

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Thread

Screen goes blank for 1-2 seconds Pankaj Jangid <pankaj@codeisgreat.org> - 2022-01-27 05:40 +0100
  Re: Screen goes blank for 1-2 seconds David Wright <deblis@lionunicorn.co.uk> - 2022-01-27 06:00 +0100
    Re: Screen goes blank for 1-2 seconds Pankaj Jangid <pankaj@codeisgreat.org> - 2022-01-27 15:10 +0100
  Re: Screen goes blank for 1-2 seconds Bijan Soleymani <bijan@psq.com> - 2022-01-27 06:10 +0100
    Re: Screen goes blank for 1-2 seconds Pankaj Jangid <pankaj@codeisgreat.org> - 2022-01-27 15:20 +0100
  Re: Screen goes blank for 1-2 seconds "hdv@gmail" <hdv.jadev@gmail.com> - 2022-01-27 10:10 +0100
    Re: Screen goes blank for 1-2 seconds Bijan Soleymani <bijan@psq.com> - 2022-01-27 10:30 +0100
      Re: Screen goes blank for 1-2 seconds Bijan Soleymani <bijan@psq.com> - 2022-01-27 10:50 +0100
        Re: Screen goes blank for 1-2 seconds "hdv@gmail" <hdv.jadev@gmail.com> - 2022-01-27 11:10 +0100
          Re: Screen goes blank for 1-2 seconds Bijan Soleymani <bijan@psq.com> - 2022-01-27 11:20 +0100
            Re: Screen goes blank for 1-2 seconds "hdv@gmail" <hdv.jadev@gmail.com> - 2022-01-27 11:40 +0100
              Re: Screen goes blank for 1-2 seconds Bijan Soleymani <bijan@psq.com> - 2022-01-27 16:50 +0100
              Re: Screen goes blank for 1-2 seconds "hdv@gmail" <hdv.jadev@gmail.com> - 2022-02-09 21:00 +0100
    Re: Screen goes blank for 1-2 seconds Pankaj Jangid <pankaj@codeisgreat.org> - 2022-01-27 15:30 +0100
  Re: Screen goes blank for 1-2 seconds Vincent Lefevre <vincent@vinc17.net> - 2022-01-27 11:50 +0100
    Re: Screen goes blank for 1-2 seconds Vincent Lefevre <vincent@vinc17.net> - 2022-01-27 11:50 +0100
      Re: Screen goes blank for 1-2 seconds Tim Woodall <debianuser@woodall.me.uk> - 2022-01-27 12:20 +0100
        Re: Screen goes blank for 1-2 seconds Pankaj Jangid <pankaj@codeisgreat.org> - 2022-01-27 15:40 +0100
    Re: Screen goes blank for 1-2 seconds Pankaj Jangid <pankaj@codeisgreat.org> - 2022-01-27 15:40 +0100
  Re: Screen goes blank for 1-2 seconds Dan Ritter <dsr@randomstring.org> - 2022-01-27 12:40 +0100
    Re: Screen goes blank for 1-2 seconds Pankaj Jangid <pankaj@codeisgreat.org> - 2022-01-27 15:30 +0100
      Re: Screen goes blank for 1-2 seconds Pankaj Jangid <pankaj@codeisgreat.org> - 2022-01-28 08:10 +0100
        Re: Screen goes blank for 1-2 seconds Pankaj Jangid <pankaj@codeisgreat.org> - 2022-01-28 14:40 +0100
          Re: Screen goes blank for 1-2 seconds "hdv@gmail" <hdv.jadev@gmail.com> - 2022-01-28 14:50 +0100
            Re: Screen goes blank for 1-2 seconds Bijan Soleymani <bijan@psq.com> - 2022-01-28 15:40 +0100
              Re: Screen goes blank for 1-2 seconds "hdv@gmail" <hdv.jadev@gmail.com> - 2022-01-28 16:20 +0100
                Re: Screen goes blank for 1-2 seconds Bijan Soleymani <bijan@psq.com> - 2022-01-28 16:50 +0100
                Re: Screen goes blank for 1-2 seconds "hdv@gmail" <hdv.jadev@gmail.com> - 2022-01-28 17:00 +0100
                Re: Screen goes blank for 1-2 seconds "Andrew M.A. Cater" <amacater@einval.com> - 2022-01-28 17:00 +0100
                Re: Screen goes blank for 1-2 seconds "hdv@gmail" <hdv.jadev@gmail.com> - 2022-01-28 17:10 +0100
                Re: Screen goes blank for 1-2 seconds "Andrew M.A. Cater" <amacater@einval.com> - 2022-01-28 21:40 +0100
  Re: Screen goes blank for 1-2 seconds Pankaj Jangid <pankaj@codeisgreat.org> - 2022-02-06 17:10 +0100
    Re: Screen goes blank for 1-2 seconds Pankaj Jangid <pankaj@codeisgreat.org> - 2022-02-09 14:10 +0100

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