[Bug 91052] [IVB] GPU HANG: ecode 7:0:0x85fffff8, reason: Ring hung

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91052

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|DRM/Intel                   |Drivers/DRI/i915
         QA Contact|intel-gfx-bugs at lists.freede |
                   |sktop.org                   |
            Product|DRI                         |Mesa
           Assignee|intel-gfx-bugs at lists.freede |idr at freedesktop.org
                   |sktop.org                   |

--- Comment #6 from yann <yann.argotti at intel.com> ---
(In reply to Jiri Slaby from comment #1)
> Created attachment 116645 [details]
> /sys/class/drm/card0/error

We seem to have neglected the bug a bit, apologies.

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: 4.0.5-1.g0f16252-desktop
Platform: IvyBridge (pci id: 0x0166)
Mesa: [Please confirm your mesa version]

>From this error dump, hung is happening in render ring batch with active head
at 0x11637e28, with 0x7a000003 (PIPE_CONTROL) as IPEHR.

Batch extract (around 0x11637e28):

0x11637df8:      0x7b000005: 3DPRIMITIVE:
0x11637dfc:      0x00000105:    tri strip random
0x11637e00:      0x0000000c:    vertex count
0x11637e04:      0x00000040:    start vertex
0x11637e08:      0x00000001:    instance count
0x11637e0c:      0x00000000:    start instance
0x11637e10:      0x00000000:    index bias
0x11637e14:      0x7a000003: PIPE_CONTROL
0x11637e18:      0x00106000:    qword write, cs stall, depth stall,
0x11637e1c:      0x0ccb3000:    destination address
0x11637e20:      0x00000000:    immediate dword low
0x11637e24:      0x00000000:    immediate dword high
0x11637e28:      0x78150005: 3DSTATE_CONSTANT_VS
0x11637e2c:      0x00000003:    len 0 = 3, len 1 = 0
0x11637e30:      0x00000000:    len 2 = 0, len 3 = 0
0x11637e34:      0x00007921:    pointer to constbuf 0
0x11637e38:      0x00000000:    pointer to constbuf 1
0x11637e3c:      0x00000000:    pointer to constbuf 2
0x11637e40:      0x00000000:    pointer to constbuf 3

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