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Debian 'hibernating' on desktop and KVM?

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8 replies

by charliespencer

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I've got a Debian system on a desktop connected to a KVM switch. I am unable to use this system when I switch the KVM to it if I haven't viewed in several hours. The power button on the monitor glows green, indicating it has a signal from the system, but the display stays black. I am unable to get a response from any mouse or keyboard activity. If I cycle the power it's fine again until I ignore it for a while.

Any suggestions on how to get a response from this unit when I set my KVM to it?

Thanks.

8 replies

by the scummy one

does it work? Or is it simply whenever going back and forth with the KVM kills the Linux display?

by charliespencer

I can switch between it and other systems without a problem until I let it sit.

I've got a screen saver enabled but I can't tell if it's coming out of it or not.

The Power Management settings are to 'Put display to sleep' after 30 minutes, never put the computer to sleep, and suspend when inactive. I suspect it's the 'Put display to sleep' that's causing the problem; apparently I don't know how to 'unsleep' it. I'll set everything possible in Power Management to 'Never' and see what happens.

Oh, and nice Halloween avatar.

by the scummy one

Just testing on my PCLOS system, and I set the standby to 1 min. It came back easily, then I set the power off to 1 min, flipped over to Vista for a few minutes, came back, and it came back on quickly as well.
When I have a few more minutes, I'll look further into it.

by the scummy one

switch the kvm cables, plug them in opposite. Does the problem still occur? If not, does it occur on the other system?

by charliespencer

You mean swap the cable end for end? I can't; they aren't interchangeable. The end at the switch is as DB-15 similar to a VGA; the other end is a VGA and USB. Also, the genders are different.

Unless you mean swap the system ends of two cables, say use the cables for system A on system B, and vice versa. I can't do that until tomorrow, but I don't think that's it. I've used the cables currently connected to the Debian system on Windows boxes in the past without issue.

Clarification, please.

by the scummy one

was the thought on that. Just in case there was a cable issue.
Do you have another monitor to test with? If so, you can try plugging in the Linux system to a different monitor, and see if it will come back properly.
As for key combo to bring it back, I have no idea. I just use the mouse or spacebar in Win and Linux, seems to do it for me.

However, I had a similar problem in a Vista box a few months back. The fix required replacing the KVM itself.

by charliespencer

I'm not buying another KVM to support a box that will be off my desk by the end of the year. I'm going to leave it alone overnight and see if it responds in the morning. If not, I'll just have to learn to shut it off when I'm done with it.

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