[Bug 111970] Intel GPU hang

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=111970

--- Comment #1 from Chris Wilson <chris at chris-wilson.co.uk> ---
rcs0 command stream:
  IDLE?: no
  START: 0x000d8000
  HEAD:  0x00000a38 [0x00000000]
  TAIL:  0x00000a38 [0x00000000, 0x00000000]
  CTL:   0x00003001
  MODE:  0x00000000
  HWS:   0xfedfe000
  ACTHD: 0x00000000 00000a38
  IPEIR: 0x00000000
  IPEHR: 0x7a000004
  INSTDONE: 0xffdfffff
  SC_INSTDONE: 0xffffffff
  SAMPLER_INSTDONE[0][0]: 0xffffffff
  SAMPLER_INSTDONE[0][1]: 0xffffffff
  SAMPLER_INSTDONE[0][2]: 0xffffffff
  ROW_INSTDONE[0][0]: 0xffffffff
  ROW_INSTDONE[0][1]: 0xffffffff
  ROW_INSTDONE[0][2]: 0xffffffff
  BBADDR: 0x0000fffe_ec064454
  BB_STATE: 0x00000020
  INSTPS: 0x00008840
  INSTPM: 0x00000000
  FADDR: 0x00000000 000d8a38
  RC PSMI: 0x00000010
  FAULT_REG: 0x00000000
  GFX_MODE: 0x00008000
  PDP0: 0x000000082920f000
  PDP1: 0x0000000000000000
  PDP2: 0x0000000000000000
  PDP3: 0x0000000000000000
  ring->head: 0x00000000
  ring->tail: 0x00000000
  hangcheck timestamp: 0ms (4298511936; epoch)
  engine reset count: 0
  ELSP[0]:  pid 2433, seqno       1b:001b0ac2!, prio 2, emitted 1431653766ms,
start 000d8000, head 00000998, tail 00000a38
  ELSP[1]:  pid 0, seqno        5:0005ec0c, prio -4093, emitted 1431653766ms,
start 00301000, head 00000850, tail 000008b8

The gpu didn't switch to ELSP[1] at the end of the first context.

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