Random -quickly changing- black rectangles take over a whole window
Submitted by Enrico Boldra
Link to original bug (#770444)
Description
Created attachment 334227 black rectangles over a window
Random and quickly changing black rectangles take over a whole single window from time to time or in some cases they occupy the entire screen. They don't disappear if chaning to ALT-F1, then back to ALT-F7. Please refer to the attached screenshots showing this strange behaviour taking place after the upgrade to Debian 8 (GDM 3.14.1-7).
Attachment 334227, "black rectangles over a window":
Version: 3.14.x