On 30 Jun 2023, at 18:26, Robert Moskowitz <rgm@xxxxxxxxxxxxxxx> wrote:
On 6/30/23 13:13, George N. White III
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.
In have seen issues with KVMs messing up EDID in tne past.Suggest you test by pluging the monitor directly into your laptop.
"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
FYI to install a command you can do this:
$ sudo dnf install /usr/bin/xrandr $ sudo dnf install /usr/bin/inxi Etc.
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
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