[Bug 94064] Skylake GPU hang ecode 9:0:0x85dffffb, in plasmashell

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94064

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|DRM/Intel                   |Drivers/DRI/i915
            Version|XOrg git                    |unspecified
         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 #2 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 0xffff86a8, with 0x7a000004 (PIPE_CONTROL) as IPEHR.

Batch extract (around 0xffff86a8):

0xffff8658:      0x784e0002: 3D UNKNOWN: 3d_965 opcode = 0x784e
0xffff865c:      0x00000042: MI_NOOP
0xffff8660:      0x00000000: MI_NOOP
0xffff8664:      0x00000000: MI_NOOP
0xffff8668:      0x78140000: 3D UNKNOWN: 3d_965 opcode = 0x7814
0xffff866c:      0x80000844: UNKNOWN
0xffff8670:      0x780f0000: 3DSTATE_SCISSOR_POINTERS
0xffff8674:      0x00007c20:    scissor rect offset
Bad count in PIPE_CONTROL
0xffff8678:      0x7a000004: PIPE_CONTROL: no write, no depth stall, no RC
write flush, no inst flush
0xffff867c:      0x00000000:    destination address
0xffff8680:      0x00000000:    immediate dword low
0xffff8684:      0x00000000:    immediate dword high
Bad count in PIPE_CONTROL
0xffff8690:      0x7a000004: PIPE_CONTROL: no write, no depth stall, no RC
write flush, no inst flush
0xffff8694:      0x00101c11:    destination address
0xffff8698:      0x00000000:    immediate dword low
0xffff869c:      0x00000000:    immediate dword high
Bad count in PIPE_CONTROL
0xffff86a8:      0x7a000004: PIPE_CONTROL: no write, no depth stall, no RC
write flush, no inst flush
0xffff86ac:      0x00002000:    destination address
0xffff86b0:      0x00000000:    immediate dword low
0xffff86b4:      0x00000000:    immediate dword high

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