[Bug 95311] New: GPU hang ecode 8:0:0xfffffffe still present on 4.6-rc6+, ok on 4.5.0

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=95311

            Bug ID: 95311
           Summary: GPU hang ecode 8:0:0xfffffffe  still present on
                    4.6-rc6+, ok on 4.5.0
           Product: DRI
           Version: XOrg git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: jim654 at xs4all.nl
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 123534
  --> https://bugs.freedesktop.org/attachment.cgi?id=123534&action=edit
tar file containing card-error, dmesg, xorg  logs

Tried today linux.git after latest drm fixes 
==
Commit 659a1823273873027a19e190012a7b0c5d7b541c
Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux

    Pull drm fixes from Dave Airlie:
     "Fixes for i915, amdgpu/radeon and imx.

$ git describe
v4.6-rc6-210-g0783783
==

No more page flip reports in the logs (I had similar output in 4.6-rc5 as
listed in eg id=94572)

But GPU HANG still present. Steps to reproduce
- start X
- move some windows around, maximize/minimize scroll firefox window and
  within minute or so GPU got stuck

On plain kernel 4.5.0 seems fine, not managed to get gpu hang after similar
steps.

Attached tar file containing dmesg output with drm.debug=0xe0, card-error,
xorg.0.log

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