Notebook with inactive screen after timeout

Hi, I don't understand whether my computer is sleeping or hibernating or something else. After booting up into a KDE desktop on OpenSuse 13.1, after doing nothing for around ten minutes, the screen goes black. W.hen I move the mouse the computer "wakes up" a bit and the screen shows the OpenSuse graphic on the right side, and the mouse pointer is responsive, but nothing else is visible or available. There is no dialogue box to enter a password to unlock it, nothing at all. If I have a browser or other app open and close the lid, it restores quite well on opening the lid again. What is the difference between the two states, and what config file would I need to look at to resolve the problem above? My only solution to date is to CTRL+ALT+F2 su and reboot. Irritating but not the end of the world. Thanks Andrew Greig

On 11/06/14 20:46, Andrew Greig wrote:
Hi, I don't understand whether my computer is sleeping or hibernating or something else. After booting up into a KDE desktop on OpenSuse 13.1, after doing nothing for around ten minutes, the screen goes black. W.hen I move the mouse the computer "wakes up" a bit and the screen shows the OpenSuse graphic on the right side, and the mouse pointer is responsive, but nothing else is visible or available. There is no dialogue box to enter a password to unlock it, nothing at all.
I am guessing that the graphics driver is not playing well with the power management software. Perhaps typing the username and password "in the dark" *may* reactivate the screen, assuming the cursor is at the right position. Hiberbation would take longer to restore (as it loads up from disk, but if you have a SSD it would be relatively fast) - Sleeping is much faster as it just restarts the cpu and everything is still in ram.
If I have a browser or other app open and close the lid, it restores quite well on opening the lid again. What is the difference between the two states, and what config file would I need to look at to resolve the problem above?
I take it you are re-opening the lid before 10 mins? I am guessing, this would only turn off the screen (like a physical switch turning power on/off on your screen), and the power management software does not play correctly with that.
My only solution to date is to CTRL+ALT+F2 su and reboot. Irritating but not the end of the world.
The fact that you can do this points to a X/graphics issue. Have you tried to kill X and only restart X from there?
Daniel.
Thanks
Andrew Greig
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Andrew Greig <pushin.linux@gmail.com> writes:
I don't understand whether my computer is sleeping or hibernating or something else. After booting up into a KDE desktop on OpenSuse 13.1, after doing nothing for around ten minutes, the screen goes black.
That's probably the X screen saver. See xset(1).
When I move the mouse the computer "wakes up" a bit and the screen shows the OpenSuse graphic on the right side, and the mouse pointer is responsive, but nothing else is visible or available. There is no dialogue box to enter a password to unlock it, nothing at all.
Can't help there. Try Ctrl+Alt+F1 and back; try sshing in.
If I have a browser or other app open and close the lid, it restores quite well on opening the lid again. What is the difference between the two states, and what config file would I need to look at to resolve the problem above?
Surely closing lid triggers a completely different path, e.g. suspend-to-RAM?
My only solution to date is to CTRL+ALT+F2 su and reboot. Irritating but not the end of the world.
You could restart just X instead. You could look at logs and dmesg and see if any processes are hung. You could even try triggering a suspend-to-RAM and see if the video BIOS tweaks *that* does on restore, are enough to unbugger the video.
participants (3)
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Andrew Greig
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Daniel Jitnah
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trentbuck@gmail.com