[Bug 99566] [SNB] GPU HANG: ecode 6:0:0x85fffffc, in compiz [17500], reason: Hang on render ring, action: reset

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=99566

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Assignee|yann.argotti at intel.com      |ted at digistate.nl
            Summary|[gen6] GPU hang in compiz   |[SNB] GPU HANG: ecode
                   |                            |6:0:0x85fffffc, in compiz
                   |                            |[17500], reason: Hang on
                   |                            |render ring, action: reset

--- Comment #2 from yann <yann.argotti at intel.com> ---
According to mesa engineers, mesa only emits 3DSTATE_VERTEX_ELEMENTS on-demand
right before 3DPRIMITIVE.

Chris has changed SNA to emit a dummy primitive between VertexElements in 
4acd4a7d3d2f41227022fa7581cfb85a0b124eae in xf86-video-intel (thanks to
https://cgit.freedesktop.org/xorg/driver/xf86-video-intel/commit/?id=4acd4a7d3d2f41227022fa7581cfb85a0b124eae)

So I recommend to update to latest version of xf86-video-intel since fix should
be already in and mark as REOPENED if you can reproduce (and attach fresh gpu
error dump) and RESOLVED/* if you cannot reproduce.

An alternate solution is to use Glamor/modesetting, but 1st try this one.

========================
*Details:
- Kernel: 4.8.0-34-generic
- Platform: SandyBridge (PCI ID: 0x0116, PCI Revision: 0x09, PCI Subsystem:
144d:c0b2)
- 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 0x7a09d574, with 0x7a000003 (PIPE_CONTROL) as IPEHR.

Batch extract (around 0x7a09d574):

0x7a09d52c:      0x78090005: 3DSTATE_VERTEX_ELEMENTS
0x7a09d530:      0x02000000:    buffer 0: valid, type 0x0000, src offset 0x0000
bytes
0x7a09d534:      0x11110000:    (X, Y, Z, W), dst offset 0x00 bytes
0x7a09d538:      0x02000010:    buffer 0: valid, type 0x0000, src offset 0x0010
bytes
0x7a09d53c:      0x11110000:    (X, Y, Z, W), dst offset 0x00 bytes
0x7a09d540:      0x02000020:    buffer 0: valid, type 0x0000, src offset 0x0020
bytes
0x7a09d544:      0x11110000:    (X, Y, Z, W), dst offset 0x00 bytes
0x7a09d548:      0x7b001804: 3DPRIMITIVE: tri fan sequential
0x7a09d54c:      0x00000004:    vertex count
0x7a09d550:      0x00000000:    start vertex
0x7a09d554:      0x00000001:    instance count
0x7a09d558:      0x00000000:    start instance
0x7a09d55c:      0x00000000:    index bias
0x7a09d560:      0x7a000003: PIPE_CONTROL
0x7a09d564:      0x00100002:    no write, cs stall, stall at scoreboard,
0x7a09d568:      0x00000000:    destination address
0x7a09d56c:      0x00000000:    immediate dword low
0x7a09d570:      0x00000000:    immediate dword high
0x7a09d574:      0x7a000003: PIPE_CONTROL
0x7a09d578:      0x00004000:    qword write,
0x7a09d57c:      0x00b57004:    destination address
0x7a09d580:      0x00000000:    immediate dword low
0x7a09d584:      0x00000000:    immediate dword high
0x7a09d588:      0x780e0002: 3DSTATE_CC_STATE_POINTERS
0x7a09d58c:      0x00007c01:    blend change 1
0x7a09d590:      0x00000000:    depth stencil change 0
0x7a09d594:      0x00000000:    cc change 0

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