[Bug 94002] [drm] GPU HANG: ecode 9:0:0x85dfbfff, in firefox [881], reason: Ring hung, action: reset

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94002

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
         QA Contact|intel-gfx-bugs at lists.freede |
                   |sktop.org                   |
            Version|XOrg git                    |11.1
          Component|DRM/Intel                   |Drivers/DRI/i915
           Assignee|intel-gfx-bugs at lists.freede |idr at freedesktop.org
                   |sktop.org                   |
            Product|DRI                         |Mesa

--- Comment #9 from yann <yann.argotti at intel.com> ---
There were workarounds on SKL pushed in kernel, so please re-test with latest
kernel to see if it has some benefits on that work.

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

>From this error dump, hung is happening in render ring batch with active head
at 0xfff5d9cc, with 0x7a000004 (PIPE_CONTROL) as IPEHR.

Batch extract (around 0xfff5d9cc):

Bad length 7 in (null), expected 6-6
0xfff5d980:      0x7b000005: 3DPRIMITIVE: fail sequential
0xfff5d984:      0x0000000f:    vertex count
0xfff5d988:      0x00000003:    start vertex
0xfff5d98c:      0x00000000:    instance count
0xfff5d990:      0x00000001:    start instance
0xfff5d994:      0x00000000:    index bias
0xfff5d998:      0x00000000: MI_NOOP
Bad count in PIPE_CONTROL
0xfff5d99c:      0x7a000004: PIPE_CONTROL: no write, no depth stall, no RC
write flush, no inst flush
0xfff5d9a0:      0x00000000:    destination address
0xfff5d9a4:      0x00000000:    immediate dword low
0xfff5d9a8:      0x00000000:    immediate dword high
Bad count in PIPE_CONTROL
0xfff5d9b4:      0x7a000004: PIPE_CONTROL: no write, no depth stall, no RC
write flush, no inst flush
0xfff5d9b8:      0x00101c11:    destination address
0xfff5d9bc:      0x00000000:    immediate dword low
0xfff5d9c0:      0x00000000:    immediate dword high
Bad count in PIPE_CONTROL
0xfff5d9cc:      0x7a000004: PIPE_CONTROL: no write, no depth stall, no RC
write flush, no inst flush
0xfff5d9d0:      0x00000000:    destination address
0xfff5d9d4:      0x00000000:    immediate dword low
0xfff5d9d8:      0x00000000:    immediate dword high

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