Recently I underwent a botched nvidia-prime install that left a bitter taste in my mouth: https://bugs.launchpad.net/ubuntu/+source/nvidia-prime/+bug/1249067
I had to purge my system of all nvidia drivers (apt-get --purge remove nvidia\*), then reinstall them: https://wiki.ubuntu.com/Bumblebee After reinstallation, when my screen goes blank after idling, sometimes it resumes to the desktop, other times I'm left at a black screen with moving cursor that appears to indicate the screen is actually there, but just not visible. The mouse cursor will change from a pointer to a hand (if it happens to hover over a hyperlink in the browser), or a 'I' (when it hovers over a text input area). I kept searching for a solution that related to the Xorg system, but everything I threw at it (the little I know about X) didn't bear fruit. In the end, I just simply had to go to a console (CTRL+ALT+F1) to restart lightdm to get my desktop back. When working with multiple windows and having many applications open, losing the desktop can cause one to experiance weird emotions and exhibit irrational actions; and it gets really old, really fast! To cut a long story short, today I got fedup with it and started killing anything that interracts with the display system (sometimes fatally that I had to reboot by holding power button down for >5secs) to get this sorted. Interestingly, the culprit appears to be compiz. I can now duplicate this easily: 1. launch screensaver preferences (i use xscreensaver) 2. select a GL screensaver (the black screen with mouse occurs more often with such a screensaver) 3. click Preview button then hit the ESC key to return to desktop repeatedly until the black screen+mouse appears 4. CTRL+ALT+F1 to go to console window 1 and run the command: kill -9 $(pgrep compiz) 5 CTRL+ALT+F7 to return to GUI desktop - you should see your desktop minus the open windows 6 move mouse cursor to get compiz to reactivate itself and bring all your open applications into view Hopefully this workaround will keep people like me sane for a little longer... Cheers, ak. -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/1273832 Title: [fglrx] Lockscreen/lid-close xserver freeze if UXA accel used. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1273832/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
