Unfortunately, it appears that the culprit is the nvidia binary blob, switching to nouveau made the system reboot without a hitch. I did a bit of housekeeping on the bug and marked the nvidia binary driver as affected.
Sorry for the line noise. ** Changed in: linux (Ubuntu) Status: Incomplete => Invalid ** Also affects: nvidia-graphics-drivers-331-updates (Ubuntu) Importance: Undecided Status: New ** Tags removed: kernel-bug-exists-upstream kernel-bug-exists- upstream-3.17-rc5 needs-bisect regression-release ** Summary changed: - [Dell L702X] Reboot fails with all methods except write to CF9 + [Dell L702X] nvidia-331.38-0ubuntu7.1 prevents system from rebooting -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1371911 Title: [Dell L702X] nvidia-331.38-0ubuntu7.1 prevents system from rebooting To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1371911/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs