[Bug 98309] [SKL] [drm] GPU HANG: ecode 9:0:0x85dffffb, in X [447], reason: Hang on render ring, action: reset

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=98309

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

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

--- Comment #3 from yann <yann.argotti at intel.com> ---
Mads, please retry as Chris is advising:  with intel_iommu=igfx_off on your
boot command line. 
There were also improvements pushed in Mesa that will benefit to your system,
so please re-test with latest 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: 4.9.0-rc1+
Platform: Skylake (pci id: 0x191b; PCI Revision: 0x06; PCI Subsystem:
1028:06e4)
Mesa: [Please confirm your mesa version]

>From this error dump, hung is happening in render ring batch with active head
at 0xc7ffe38c, with 0x7a000004 (PIPE_CONTROL) as IPEHR.

Batch extract (around 0xc7ffe38c):

0xc7ffe358:      0x7b000005: 3DPRIMITIVE: fail sequential
0xc7ffe35c:      0x00000006:    vertex count
0xc7ffe360:      0x00000004:    start vertex
0xc7ffe364:      0x00000000:    instance count
0xc7ffe368:      0x00000001:    start instance
0xc7ffe36c:      0x00000000:    index bias
0xc7ffe370:      0x00000000: MI_NOOP
Bad count in PIPE_CONTROL
0xc7ffe374:      0x7a000004: PIPE_CONTROL: no write, no depth stall, no RC
write flush, no inst flush
0xc7ffe378:      0x00101001:    destination address
0xc7ffe37c:      0x00000000:    immediate dword low
0xc7ffe380:      0x00000000:    immediate dword high
Bad count in PIPE_CONTROL
0xc7ffe38c:      0x7a000004: PIPE_CONTROL: no write, no depth stall, no RC
write flush, no inst flush
0xc7ffe390:      0x00000408:    destination address
0xc7ffe394:      0x00000000:    immediate dword low
0xc7ffe398:      0x00000000:    immediate dword high
0xc7ffe3a4:      0x78230000: 3D UNKNOWN: 3d_965 opcode = 0x7823
0xc7ffe3a8:      0x00007e00: MI_NOOP

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