[Bug 80627] New: [NVE6] 'HUB_INIT timed out' 'Watchdog detected hard LOCKUP on cpu 7'

* [Bug 80627] New: [NVE6] 'HUB_INIT timed out' 'Watchdog detected hard LOCKUP on cpu 7'
@ 2014-06-28 12:47 bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ
       [not found] ` <bug-80627-8800-V0hAGp6uBxMKqLRl/0Ahz6D7qz1kEfGD2LY78lusg7I@public.gmane.org/>
  0 siblings, 1 reply; 5+ messages in thread
From: bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ @ 2014-06-28 12:47 UTC (permalink / raw
  To: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW

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https://bugs.freedesktop.org/show_bug.cgi?id=80627

          Priority: medium
            Bug ID: 80627
          Assignee: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
           Summary: [NVE6] 'HUB_INIT timed out' 'Watchdog detected hard
                    LOCKUP on cpu 7'
        QA Contact: xorg-team-go0+a7rfsptAfugRpC6u6w@public.gmane.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: zack-hQ3HDwcYbXcdnm+yROfE0A@public.gmane.org
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: git
         Component: Driver/nouveau
           Product: xorg

Created attachment 101915
  --> https://bugs.freedesktop.org/attachment.cgi?id=101915&action=edit
linux 3.15.1

On kernels after ~3.14, some time after nouveau fails to initialize
(<60 seconds) ~all of userland becomes mostly unreponsive (cpu time
preemption?) [dmesg1]. The 'unresponsive' behavior starts
at around the same time 56.740245 happens.

I bisected, and found the first commit where this happens is
1f1ac3bf2a804911ad46076b10ce15364237a698. Removing this commit causes
the previous behavior: initialization fails as usual but nothing else
interesting happens.

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