The 3.2.0-17.26 kernel now has RC6 enabled by default[0]. RC6 is a technology which allows the GPU to go into a very low power consumption state when the GPU is idle (down to 0V).
A quick test to see if this bug is RC6 related would be to disable RC6. To disable RC6, do the following: Hold down Left-Shift key to enter the Grub menu on boot Hit 'e' to edit the kernel command line Append i915.i915_enable_rc6=0 as a kernel boot parameter For example: linux /boot/vmlinuz-3.2.0-17-generic <...> quiet splash vt.handoff=7 i915.i915_enable_rc6=0 Press Ctrl-x to boot It would be great if you could test this and report back if your issue is resolved with RC6 disabled. [0] https://wiki.ubuntu.com/Kernel/PowerManagementRC6 ** Changed in: linux (Ubuntu) Importance: Undecided => Medium ** Tags added: kernel-da-key rc6 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/954451 Title: [i915] Window Manager crashes right after login To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/954451/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
