[Bug 97981] ubuntu 14.04 laptop restarts desktop session immediately on resume after suspend

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=97981

yann <yann.argotti at intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      i915 features|                            |GPU hang
            Version|XOrg git                    |unspecified
      i915 platform|                            |HSW
         QA Contact|intel-gfx-bugs at lists.freede |
                   |sktop.org                   |
           Assignee|intel-gfx-bugs at lists.freede |idr at freedesktop.org
                   |sktop.org                   |
          Component|DRM/Intel                   |Drivers/DRI/i915
            Product|DRI                         |Mesa

--- Comment #6 from yann <yann.argotti at intel.com> ---
There were improvements pushed in kernel and Mesa that will benefit to your
system, so please re-test with latest kernel & Mesa to see if this issue is
still occurring.

In parallel, assigning to Mesa product (please let me know if I am mistaken
with this GPU Hang).

Kernel: 4.4.0-38-generic
Platform: Haswell-ULT (pci id: 0x0a16)
Mesa: [Please confirm your mesa version]

>From this error dump, hung is happening in render ring batch with active head
at 0x00dd02ec, with 0x7a000003 (PIPE_CONTROL) as IPEHR.

Batch extract (around 0x00dd02ec):

0x00dd02bc:      0x7b000005: 3DPRIMITIVE:
0x00dd02c0:      0x00000004:    tri list sequential
0x00dd02c4:      0x00000006:    vertex count
0x00dd02c8:      0x00000000:    start vertex
0x00dd02cc:      0x00000001:    instance count
0x00dd02d0:      0x00000000:    start instance
0x00dd02d4:      0x00000000:    index bias
0x00dd02d8:      0x7a000003: PIPE_CONTROL
0x00dd02dc:      0x00101c11:    no write, cs stall, render target cache flush,
instruction cache invalidate, texture cache invalidate, vf fetch invalidate,
depth cache flush,
0x00dd02e0:      0x00000000:    destination address
0x00dd02e4:      0x00000000:    immediate dword low
0x00dd02e8:      0x00000000:    immediate dword high
0x00dd02ec:      0x780e0000: 3DSTATE_CC_STATE_POINTERS
0x00dd02f0:      0x00007f01:    pointer to COLOR_CALC_STATE at 0x00007f00
(changed)
0x00dd02f4:      0x7a000003: PIPE_CONTROL
0x00dd02f8:      0x00101000:    no write, cs stall, render target cache flush,
0x00dd02fc:      0x00000000:    destination address
0x00dd0300:      0x00000000:    immediate dword low
0x00dd0304:      0x00000000:    immediate dword high

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