[Bug 89666] New: GPU Crash because of USB Problem?

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89666

            Bug ID: 89666
           Summary: GPU Crash because of USB Problem?
           Product: DRI
           Version: XOrg git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: andreas_b123 at bluewin.ch
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 114453
  --> https://bugs.freedesktop.org/attachment.cgi?id=114453&action=edit
crash dump

I noticed a really strange problem.

I have an Android Phone connected by USB, a cheap Chinese one which sometime
crashes. When the Phone crashes the image on both screens freezes.

When I disconnect the Phone, the freeze on my screens is gone.

I hat this bug more than three times, so I decided now to fill in this bug
report, even it sounds really strange for me.

OS is Ubuntu 14.04. CPU/GPU is Intel(R) Core(TM) i7-4790 CPU @ 3.60GHz

dmesg output:

[ 6454.656894] [drm] stuck on render ring
[ 6454.656897] [drm] GPU crash dump saved to /sys/class/drm/card0/error
[ 6454.656897] [drm] GPU hangs can indicate a bug anywhere in the entire gfx
stack, including userspace.
[ 6454.656898] [drm] Please file a _new_ bug report on bugs.freedesktop.org
against DRI -> DRM/Intel
[ 6454.656899] [drm] drm/i915 developers can then reassign to the right
component if it's not a kernel issue.
[ 6454.656899] [drm] The gpu crash dump is required to analyze gpu hangs, so
please always attach it.

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