Similar problem here. Dell Inspiron 9300, ATI Radeon X300 chipset. Internal 1920x1200 LCD and Samsung 1600x1200 ext LCD on DVI-0. Using Open-source ATI drivers.
Dual head worked perfectly in V9 and V10, now broken in V11 if resolution set above 1280x1024, or anything other than 'Ubuntu Classic' desktop is selected. Also apps like etracer now report "*** etracer error: Couldn't initialize video: Couldn't find matching GLX visual (Resource temporarily unavailable)" -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/776565 Title: compiz no longer able to drive my external monitor on upgrade to 11.04; does not recover -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
