Re: Restarting video driver to turn on external vga port

[Robert Moskowitz <rgm@xxxxxxxxxxxxxxx>]

On 6/30/23 13:13, George N. White III wrote:

On Fri, Jun 30, 2023 at 1:19 PM Robert Moskowitz <rgm@xxxxxxxxxxxxxxx> wrote:

I just rebooted after applying new updates.  In the past, this got the external video going.  Not this time.

VGA suggests an old monitor, so try to verify that it didn't fail by connecting to another system or playing

with configuration options until it works.  No point wasting time on a dead or dying monitor that is worth less

than the cost of proper disposal.

    Actually the bottleneck is my KVM which only supports VGA.  The
    monitor works fine when I switch the kvm to another system.

"xrandr --query" may have some useful info.

    # xrandr --query
    -bash: xrandr: command not found




Check "inxi -Fzx" for missing graphics hardware.

    # inxi -Fzx
    -bash: inxi: command not found

  There should be details in "sudo journalctl -b N"

(sudo gives details that are not included when run as regular user).   Look at a boot that worked for lines

related to the external monitor and compare with what is in the latest boot.

    That may take for ever.  what file do I grep to look for dates when
    it worked?  I booted the system Monday after a kernel install and
    the video worked fine then.

One thing to watch is EDID -- some older monitors have bad data that newer drivers reject.

    And what is EDID?  And would that come through the KVM?
    
    thanks

--

George N. White III

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