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#1 2011-05-05 12:11:56

WishCow
Member
Registered: 2011-01-31
Posts: 57

[SOLVED] Cannot wake PC from sleep

Since the last X.org and (proprietary) catalyst driver update, I cannot wake the monitor PC from sleep.

After leaving the computer idle for ~1 hour, it will turn off the monitor, but the leds on the case, and the monitor stays lit.

No matter what keys I press, it doesn't react, the only way to bring it out of this state is to reset the PC.

The weird thing is, that I don't have any kind of sleep-when-idle set up. This never happened before the upgrade, while the monitor
would black out after being idle, it wouldn't go to this "power saving" mode.

Where should I start debugging this?

Last edited by WishCow (2011-08-08 09:47:17)

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#2 2011-05-10 08:22:37

WishCow
Member
Registered: 2011-01-31
Posts: 57

Re: [SOLVED] Cannot wake PC from sleep

Tips?

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#3 2011-05-10 13:38:13

shulamy
Member
From: israel
Registered: 2010-09-11
Posts: 453

Re: [SOLVED] Cannot wake PC from sleep

what about short press on the power key ?

try change the screensaver.

ezik

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#4 2011-05-10 18:55:13

WishCow
Member
Registered: 2011-01-31
Posts: 57

Re: [SOLVED] Cannot wake PC from sleep

It doesn't react to pressing the power button, which leads me to believe it's not really the monitor that is sleeping.

I don't have a screensaver, I use xfce4, I don't think it comes with anything screensaver related?

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#5 2011-05-11 17:06:25

shulamy
Member
From: israel
Registered: 2010-09-11
Posts: 453

Re: [SOLVED] Cannot wake PC from sleep

i think it is related to power managment,

and not screensaving and that the computer is sleeping.

maybe the driver have it somwere or you may try "acpi=off"

or "acpi=force" in the kernel's grub line.

ezik

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#6 2011-05-17 12:45:49

WishCow
Member
Registered: 2011-01-31
Posts: 57

Re: [SOLVED] Cannot wake PC from sleep

It seems acpi=force solved the problem, will do some more testing, but will mark it solved in the meantime, thanks!

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#7 2011-05-23 11:22:19

WishCow
Member
Registered: 2011-01-31
Posts: 57

Re: [SOLVED] Cannot wake PC from sleep

I was wrong, the problem still persists. Any other tips?

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#8 2011-08-08 09:46:56

WishCow
Member
Registered: 2011-01-31
Posts: 57

Re: [SOLVED] Cannot wake PC from sleep

I worked around the problem:

It seems the problem was with xlock, it did not take the -dpms flags into account, and still switched to sleep, so I switched to using xscreensaver, which does not force the monitor to standby.

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