Wolfgang Silbermayr : Can you follow these steps to disable gnome-screensaver and confirm if the issue is still reproducible?
1. Go to System / Preferences / Screensaver 2. Uncheck "Activate screensaver when computer is idle" 3. Click the "Close" button.
As Kevin Fishburne mentionned, there is a lot of chances that this bug is a duplicate of bug 216322 or bug 32457
Wolfgang Silbermayr : Can you follow these steps to disable gnome-screensaver and confirm if the issue is still reproducible?
1. Go to System / Preferences / Screensaver
2. Uncheck "Activate screensaver when computer is idle"
3. Click the "Close" button.
As Kevin Fishburne mentionned, there is a lot of chances that this bug is a duplicate of bug 216322 or bug 32457