https://bugs.freedesktop.org/show_bug.cgi?id=91731
--- Comment #4 from José Jorge lists.jjorge@free.fr --- (In reply to Michel Dänzer from comment #1)
Please attach /var/log/Xorg.0.log and the output of dmesg captured after suspend/resume.
So did I. I noticed that with Firefox and Konsole opened, the screen is ok after resmued. Reducing both has triggered the bug on second suspend.