[Bug 101665] New: lspci blocks forever with a GP107M - bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ

From: bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ@public.gmane.org
To: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
Subject: [Bug 101665] New: lspci blocks forever with a GP107M
Date: Fri, 30 Jun 2017 17:13:52 +0000	[thread overview]
Message-ID: <bug-101665-8800@http.bugs.freedesktop.org/> (raw)

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https://bugs.freedesktop.org/show_bug.cgi?id=101665

            Bug ID: 101665
           Summary: lspci blocks forever with a GP107M
           Product: xorg
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
          Assignee: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
          Reporter: kenneth-xkhwgxqQjnbNLxjTenLetw@public.gmane.org
        QA Contact: xorg-team-go0+a7rfsptAfugRpC6u6w@public.gmane.org

Hello,

I have a Dell XPS 15 9560 with a GTX 1050 Mobile (GP107M) and an Intel Kabylake
CPU.  Using Kernel 4.11.3 on the Arch installer image, whenever I run 'lspci',
it blocks indefinitely and never prints any output.

After running lspci, dmesg contains:

[   54.819264] nouveau 0000:01:00.0: Refused to change power state, currently
in D3
[   54.879968] nouveau 0000:01:00.0: Refused to change power state, currently
in D3
[   54.879973] nouveau 0000:01:00.0: Refused to change power state, currently
in D3
[   54.879974] nouveau 0000:01:00.0: DRM: resuming object tree...

Eventually the scheduler gets cranky about the hung process and starts spewing
[  245.385522] INFO: task lspci:576 blocked for more than 120 seconds.
and a backtrace every 2 minutes.

Blacklisting nouveau makes lspci work.

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