Ubuntu 16.04 LTS running on i5 6200U and standard integrated intel graphics (driver=i915).
I use evince to view a document, I go full-screen, and sometimes (not always) the screen freezes, which means that I can move the mouse but nothing happens by clicking. I press Ctrl + Alt + F1 and reboot the computer from there.
I thought evince was the problem, but the same issue appears with qpdfview, and I guess with other applications as well.
$ ls /var/crash _usr_bin_evince.1000.crash _usr_bin_evince.1000.uploaded _usr_bin_evince.1000.upload _usr_lib_xorg_Xorg.0.crash
I saw many reports of this issue when googling, but most of them suggested that the problem has been sorted out in Ubuntu 16.04, and I could not find any relevant fix.
Created a file named "20-modesetting.conf" under directory /usr/share/X11/xorg.conf.d with the following content:
Section "Device" Identifier "Intel Graphics" Driver "modesetting" EndSection