I have the same problem on Gutsy (final). I have dual screen (twinview, not xinerama). As soon as I switch back from another user, the screens go blank (light gray). I can usually still switch back to the previous user successfully, or I can switch to a console, or I can use CTRL + ALT + Backspace to get me back to GDM.
I'm using an nvidia Geforce 7600 GS with both screens connected via DVI. I'm using Metacity. Oddly, the left edge of the right screen looks like it has a shadow cast, so maybe some sort of effect is still occurring. However, rotating the cube doesn't have any effect, unlike a comment made above. Killing compiz.real from a console fixes the problem. Applying SyncToVBlank=1 has no effect, unlike a comment above. -- Switch User freezes at blank screen https://bugs.launchpad.net/bugs/112518 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs