I am able to reproduce a similar bug on gutsy: 1. System->Quit->Switch User 2. I relogin as myself 3. System->Quit->Switch User Then black screen and I can't do anything more.
If I log on this computer from another one through ssh. I can see that gdm is stuck waiting for the new X process. I straced the whole process and X freezes soon after ioctl on /dev/nvidia0 and /dev/nvidiactl, I can't even kill it. I switched from proprietary nvidia driver to the opensource nv driver and the bug disappeared so I think this bug is driver-related. I was unable to reproduce it on another computer using the X savage driver. -- switching to current logged in user freezes gdm https://bugs.launchpad.net/bugs/78470 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