In Debian 10, since an update a few weeks back, the display has included a weird spontaneous jittery mode. The browser can work for several minutes with no problem. Then with no warning components in the desktop begin flashing. A desktop chooser or indicator in the center of the screen rapidly cycles 0, 1, 2, 3, 0, ...
It seems to be triggered by a mouse click; haven't found anything more specific. If keyboard and mouse input are suspended for several seconds the activity dies down. When the episode is finished, seemingly normal usage can continue. A few seconds of the behavior is visible here. http://easthope.ca/Debian10.2.2020.01.19.mp4 Wayland/westan is also installed. In weston the mouse pointer can jump erratically but other graphical components are stable. At present I wouldn't know what to file a bug report against. Ideas? Thanks, ... P. -- Tel.: +1 604 670 0140 Bcc: peter at easthope. ca
