[Bug 99597] [SNB] GPU HANG: ecode 6:0:0x7a086ff9, in Xorg [1481], reason: Ring hung, action: reset

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=99597

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |NEEDINFO
      i915 features|                            |GPU hang
      i915 platform|                            |SNB
            Summary|GPU HANG: ecode             |[SNB] GPU HANG: ecode
                   |6:0:0x7a086ff9, in Xorg     |6:0:0x7a086ff9, in Xorg
                   |                            |[1481], reason: Ring hung,
                   |                            |action: reset

--- Comment #1 from yann <yann.argotti at intel.com> ---
There are constant improvements pushed in kernel, xf86-video-intel and Mesa
that will benefit to your system, so please re-test with latest kernel,
xf86-video-intel & Mesa (12 or 13) and:

- RESOLVED/* if you cannot reproduce.
- After updating if you can reproduce issue, use modesetting DDX and re-test
and finally mark as REOPENED ; attach fresh gpu error dump, kernel log & xorg
log.


*Details:
- Kernel: 4.4.0-59-generic
- Platform: SandyBridge (PCI ID: 0x0126)
- Mesa: [Please confirm your version]
- xf86-video-intel: [Please confirm your version]

>From this error dump, hung is happening in render ring batch with active head
at 0x000a978c, with 0x7a000002 (PIPE_CONTROL) as IPEHR.

Batch extract (around 0x000a978c):

0x000a9744:      0x79000002: 3DSTATE_DRAWING_RECTANGLE
0x000a9748:      0x00000000:    top left: 0,0
0x000a974c:      0x028d04d8:    bottom right: 1240,653
0x000a9750:      0x00000000:    origin: 0,0
0x000a9754:      0x78011002: 3DSTATE_BINDING_TABLE_POINTERS: VS mod 0, GS mod
0, PS mod 1
0x000a9758:      0x00000000:    VS binding table
0x000a975c:      0x00000000:    GS binding table
0x000a9760:      0x0003fee0:    WM binding table
0x000a9764:      0x7b003c04: 3DPRIMITIVE: rect list sequential
0x000a9768:      0x00000003:    vertex count
0x000a976c:      0x00006c4b:    start vertex
0x000a9770:      0x00000001:    instance count
0x000a9774:      0x00000000:    start instance
0x000a9778:      0x00000000:    index bias
0x000a977c:      0x7a000002: PIPE_CONTROL
0x000a9780:      0x00101400:    no write, cs stall, render target cache flush,
texture cache invalidate,
0x000a9784:      0x00000000:
0x000a9788:      0x00000000:
0x000a978c:      0x7a000002: PIPE_CONTROL
0x000a9790:      0x0000c000:    TIMESTAMP write,

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