Forgot to mention: in the kern.log attached above, there are some new messages with the 4.8.0-rc2 kernel that weren't present with 4.4.0-31:
Aug 15 18:47:06 panzer kernel: [ 310.233191] [drm:drm_atomic_helper_commit_cleanup_done [drm_kms_helper]] *ERROR* [CRTC:26:pipe A] flip_done timed out These appear numerous times, in addition to the 'vblank timed out' messages and associated stack trace, which also appeared as before. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1612895 Title: Display freezes on 2nd+subsequent logins To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1612895/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
