Re: F42/Xfce - KVM monitor not waking up

On 8/4/26 12:45 AM, Javier Perez wrote:
>
> On Sat, Aug 1, 2026 at 2:06 AM Tim via users 
> <[email protected]> wrote:
>
>     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.
>
>     -- 
>
>     uname -rsvp
>     Linux 3.10.0-1160.119.1.el7.x86_64 #1 SMP Tue Jun 4 14:43:51 UTC
>     2024 x86_64
>     (yes, this is the output from uname for this PC when I posted)
>
>     Boilerplate:  All unexpected mail to my mailbox is automatically
>     deleted.
>     I will only get to see the messages that are posted to the mailing
>     list.
>
>
> I wonder, does your KVM have EDID emulation?

This is a unit I found on Amazon, and I don't have that info.  In fact 
it does not even have a hotkey switch feature.  I missed catching that 
in the Amazon details.

So, probably I will be shopping for a different unit.  It is a pit* to 
constantly grab the IR unit to switch ports. (the unit is under the desk).

> 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.
> 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.
> Maybe that would help you out
>
> JP
>
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> -- 
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>  ~~~~     Javier Perez
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>                 from his high perch.
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