I have the same problem on a thinkpad t61p with NVIDIA's drivers, and a quadro FX570M card. On the 2nd screen windows freeze (sometimes they start frozen). Many apps kill X. I think some app is getting overtaxed as it seems like everything is very slow. Resizing a moving windows is very slow in dual-head mode. In single-head mode I find moving windows fast, but resizing very slow.
** Changed in: xorg (Ubuntu) Status: New => Confirmed -- X11 crashes with a dual-head configuration after lauching for example the screensaver https://bugs.launchpad.net/bugs/93348 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