Ok, so the OpenGL plugin is doing something the hardware doesn't like. The biggest change in OpenGL for 15.04 is the X11 Sync objects. I'm wondering if the driver is saying it's supported, but the GPU can't handle it.
Could you try opening CCSM and go to the OpenGL tab and uncheck "X11 sync objects"? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1448775 Title: Unable to login after upgrade from 14.10 to 15.04 possible XOrg crash To manage notifications about this bug go to: https://bugs.launchpad.net/compiz/+bug/1448775/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
