This was not using a xinerama setup - it was on a single laptop, with only the normal screen/display.
The screen was not locked - the example in the screenshots shows a power dialog, but any system dialog which darkens the background when it appears (eg password dialog to access administrative functions) has the same effect. I switched to another desktop using ctrl-alt-F8 etc. -- Screen not properly redrawn on desktop change, if a system dialog is shown https://launchpad.net/bugs/77415 -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
