[Bug 93078] Xorg GPU hang with Ubuntu Mainline kernel 4.3.0

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=93078

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

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

--- Comment #1 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: 4.3.0-040300-generic
Platform: Broadwell (pci id: 0x162b)
Mesa: [Please confirm your mesa version]

>From this error dump, hung is happening in render ring batch with active head
at 0x0dd322b0, with 0x7a000004 (PIPE_CONTROL) as IPEHR.

Batch extract (around 0x0dd322b0):

0x0dd32274:      0x782a0000: 3DSTATE_BINDING_TABLE_POINTERS_PS
0x0dd32278:      0x0000f1c0:    dword 1
Bad length 7 in (null), expected 6-6
0x0dd3227c:      0x7b000005: 3DPRIMITIVE: fail sequential
0x0dd32280:      0x00000000:    vertex count
0x0dd32284:      0x00000003:    start vertex
0x0dd32288:      0x00000080:    instance count
0x0dd3228c:      0x00000001:    start instance
0x0dd32290:      0x00000000:    index bias
0x0dd32294:      0x00000000: MI_NOOP
Bad count in PIPE_CONTROL
0x0dd32298:      0x7a000004: PIPE_CONTROL: no write, no depth stall, no RC
write flush, no inst flush
0x0dd3229c:      0x00100002:    destination address
0x0dd322a0:      0x00000000:    immediate dword low
0x0dd322a4:      0x00000000:    immediate dword high
0x0dd322b0:      0x784d0000: 3D UNKNOWN: 3d_965 opcode = 0x784d

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