Question #78004 on Ubuntu changed:
https://answers.launchpad.net/ubuntu/+question/78004
Status: Open => Answered
Sam proposed the following answer:
Which video card and driver:
lshw -C video
Check system administration -> hardware driver
if the correct driver is checked.
In case grep errors in Xorg.0.log:
grep -i error /var/log/Xorg.0.log
Test case, start a prefered app in a terminal e.g.:
vlc
reproduce the steps until the issue occurs, note the time and take a look in
the logfiles.
https://help.ubuntu.com/community/LinuxLogFiles
Which Ubuntu:
lsb_release -d
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