[Bug 94029] New: Intel HD 540 hangs frequently

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94029

            Bug ID: 94029
           Summary: Intel HD 540 hangs frequently
           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: nell at dev-nell.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 121561
  --> https://bugs.freedesktop.org/attachment.cgi?id=121561&action=edit
dmesg with drm.debug=0x1e

The most reliable way to reproduce this for me is logging in and opening the
Unity dash. The system will appear to hang for a few seconds and then recover.
The hang happens very frequently. Sometimes it never recovers and I have to
reboot.

Tried on Linus' 4.5rc2 kernel and intel-drm-nightly from 2016-02-06 with the
same result. The default Ubuntu 16.04 kernel (4.4.0-2-generic) boots with a
black screen, so I haven't tried any earlier kernels. Attaching the dmesg and
crash dump from intel-drm-nightly.

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