Re: F42/Xfce - KVM monitor not waking up

On 8/4/26 12:16 PM, ja wrote:
> On Tue, 2026-08-04 at 11:41 -0400, Robert Moskowitz via users wrote:
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>> On 8/4/26 12:45 AM, Javier Perez wrote:
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>>> On Sat, Aug 1, 2026 at 2:06 AM Tim via users <[email protected]> wrote:
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>>>> Robert Moskowitz:
>>>>   > > If I am away from my system, and it turns off the monitor, the KVM
>>>>   > > monitor does not wake up on activating the notebook.
>>>>   > >
>>>>   > > ...[snip more about how it works for Windows but not for Fedora]...
>>>>   
>>>>   Tim:
>>>>   > As a very basic thing:  Have you swapped monitor HDMI video cables?
>>>>   >
>>>>   > A bad cable, or damaged socket on a monitor, *could* be a problem for
>>>>   > monitor wake-up, monitor detection, mode selection, etc.
>>>>   
>>>>   And apparently some cables fail at HDMI v2 but are fine with HDMI v1.
>>>>   
>>>>   Another point:  Does your monitor have multiple inputs and auto input
>>>>   scanning?
>>>>   
>>>>   Two of mine do (both different), and with loss of signal they go
>>>>   scanning through all inputs once or twice, and *park* themselves at the
>>>>   last input.  If, later on, input 1 comes to life, it never notices it.
>>>>   Unfortunately I can't connect the PC to the last input, it's the wrong
>>>>   type of video signal.  It's also next to impossible to get the monitor
>>>>   to switch on for you to manually change inputs when it's in that state.
>>>>   So I switched off input hunting.
>>>>   
>>>>   --
>>>>   
>>> I used to have a KVM without it and it was a lot of additional steps I had to make each time I
>>> switch systems.
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>>> My current one has it and it is a blessing, because the KVM lies to each connected system telling
>>> them that the monitor is still connected.
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>>> Maybe that would help you out
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>
> I've not been following this thread very closely but I have found on my KVM switch & F44/XFCE4 the
> following works - Worth a go.
>
> Ensure that  "cntrl/alt/fx" is available - as
> root														
> systemctl enable --now [email protected]
>
> Then use Cont/Alt/F2 followed by Cont/Alt/F1 key strokes to wake up the display
>

hmmmmm

I frequently switch to the F2 (or F3) console.  Often to run DNF. So I 
know that is available.  I will try this next time.

Also if my system shutdown for some reason, instead of logging into F1 
right after restart, I will go to F2 and run DNF and see if I should 
just wait to get whatever is new and then reboot.  Or at least wait for 
the new copy of Firefox or whatever to update before logging into Xfce 
auto starts all sorts of apps that I should have updated...

So I am an old hand at using the text consoles.


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