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  Quick help on rhkramer@gmail.com - 2020-10-08 16:40 +0200
    Re: Quick help on Charles Curley <charlescurley@charlescurley.com> - 2020-10-08 19:40 +0200
      Re: Quick help on Bob Weber <bobrweber@gmail.com> - 2020-10-08 19:40 +0200
    Re: Quick help on Nicholas Geovanis <nickgeovanis@gmail.com> - 2020-10-08 21:20 +0200

#227685 — Quick help on

What I'm looking for: I didn't do much research on this problem, I checked the 
settings I could quickly find in Jessie, and did a google search or two on [].

I'm not looking for in depth help at this point, I have a workaround, I'm 
looking for someone who might have had the same problem and can say "aha, I 
had the same problem, here's what you need to do".

If no one comes forth with such a response, I will dig deeper (in my own time) 
including more googling and such, and, if no luck, will write a more detailed 
request to this list for help.

Background to the problem: I run several computers with one monitor, keyboard, 
and mouse via a Belkin SOHO KVM switch.  

One runs Wheezy (my daily driver), one runs Jessie (I was going to migrate 
there), one runs Buster (maybe I'll migrate there, in any case, I plan to use 
it to try to write a new lexer for Scintilla, which now uses C++17, so (to me) 
the easiest approach was to put Buster on my (rarely used) laptop.

I often / usually leave the computers on when I leave them to do something 
else.  

The problem: Until recently, I used the Wheezy machine almost all the time, 
and when I left the machines, the KVM was set to the Wheezy machine, and when 
I came back I could do things like move the mouse or press a key and the 
monitor would come back to life (the little power light on the monitor will 
have switched to red while I was gone, and when I move the mouse or press a 
key, it turns green and comes back to life.

I've recently found that if I leave the machines with the KVM set to the 
Jessie machine, when I come back, the power light on the monitor is red, but 
does not come back to life when I move the mouse or press a key.

In fact, I've found that in this condition, so far the only way I've been able 
to get the monitor to come back to life is to unplug and replug it to the 
power source.  (As a practice, I try to do that for some "reasonable" time, 
maybe 15 seconds or so.)

The other thing that doesn't work is switching the KVM to the Wheezy or Buster 
machines and then moving the mouse, etc.

(I presume that I could reboot one of the machines to get the monitor to "wake 
up", but I have no desire to do that.)

Aside: The three machines are not set to go into suspend or hibernate while 
I'm away.  The Wheezy and Jessie machines are set to turn the monitor off (or 
suspend?) after 10 minutes (the power light stays lit, but is red instead of 
green).

I did find (via google) one webpage that said I should look for a setting for 
the keyboard and mouse that was something like "wake on activity".

BTW, the workaround I currently (try to remember) to use is to switch to the 
Wheezy machine before stepping away.  (Aside: the power cord for the monitor 
is buried behind my desk, in a power strip with several other devices that I 
don't particularly want to turn off and back on -- things like my ObiHai VOIP 
device which has to go through a reboot process when it powers up.)





 

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#227689

On Thu, 8 Oct 2020 10:34:33 -0400
rhkramer@gmail.com wrote:

> I've recently found that if I leave the machines with the KVM set to
> the Jessie machine, when I come back, the power light on the monitor
> is red, but does not come back to life when I move the mouse or press
> a key.

My work-around for a similar situation is CTL-ALT-F1, then release all
keys, then CTL-ALT-F7. Which I believe forces X to re-initialize itself.

-- 
Does anybody read signatures any more?

https://charlescurley.com
https://charlescurley.com/blog/

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#227690

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On 10/8/20 1:30 PM, Charles Curley wrote:
> On Thu, 8 Oct 2020 10:34:33 -0400
> rhkramer@gmail.com wrote:
>
>> I've recently found that if I leave the machines with the KVM set to
>> the Jessie machine, when I come back, the power light on the monitor
>> is red, but does not come back to life when I move the mouse or press
>> a key.
> My work-around for a similar situation is CTL-ALT-F1, then release all
> keys, then CTL-ALT-F7. Which I believe forces X to re-initialize itself.
>
I have the same problem in qemu VMs.  I do the equivalent of CTL-ALT-F1 then 
CTL-ALT-F7 to get the GUI back.  It started in the last year so it is something 
in the system is doing it.  Googling wasn't much help.  I have put all the 
settings (in KDE) to not sleep or turn off the monitor to no avail.

-- 


*...Bob*

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#227694

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On Thu, Oct 8, 2020, 9:35 AM <rhkramer@gmail.com> wrote:

>
> I've recently found that if I leave the machines with the KVM set to the
> Jessie machine, when I come back, the power light on the monitor is red,
> but
> does not come back to life when I move the mouse or press a key.
>

I had a similar problem with Jessie on laptops a couple years back. What I
found was that X seemed to be dialing down the brightness on the monitor
all the way to black.

>

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