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[Bryan Cebuliak <1455852@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

see: http://ubuntuforums.org/showthread.php?t=2274999&p=13286624#post13286624
Lubuntu 15.04 on refit grub dual boot macbook 2,1 linux-image-3.16 will boot, though
sometimes hangs but, reboot will work eventually.
With linux-image-3.19 never,
? is the GPU hang reported in kern.log relevant here? i915 problem?
see kern.log snippet attached
see error attached from GPU crash dump saved to /sys/class/drm/card0/error

This seems to be a BUG as suggested by the log:
"...
Please file a _new_ bug report on bugs.freedesktop.org against DRI -> DRM/Intel


from:   /sys/class/drm/card0/error:


GPU HANG: ecode -1:0x00000000, reason: Command parser error, iir 0x00008000, action: continue
Time: 1431810790 s 799079 us
Kernel: 3.16.0-25-generic
Reset count: 0
Suspend count: 0
PCI ID: 0x27a2
EIR: 0x00000010
IER: 0x00028053
PGTBL_ER: 0x00000102
FORCEWAKE: 0x00000000
DERRMR: 0x00000000
CCID: 0x00000000
Missed interrupts: 0x00000000
  fence[0] = 00000000
  fence[1] = 00000000
  fence[2] = 00000000
  fence[3] = 00000000
  fence[4] = 00000000
  fence[5] = 00000000
  fence[6] = 00000000
  fence[7] = 00000000
  fence[8] = 00000000
  fence[9] = 00000000
  fence[10] = 00000000
  fence[11] = 00000000
  fence[12] = 00000000
  fence[13] = 00000000
  fence[14] = 00000000
  fence[15] = 00000000
  INSTDONE_0: 0x7fffffc0
  INSTDONE_1: 0x00000000
  INSTDONE_2: 0x00000000
  INSTDONE_3: 0x00000000
render command stream:
bsd command stream:
blt command stream:
vebox command stream:
bsd2 command stream:
Active [0]:
Pinned [0]:
Num Pipes: 2
Pipe [0]:
  Power: on
  SRC: 027f01df
  STAT: 90000a03
Plane [0]:
  CNTR: 00000000
  STRIDE: 00000000
  SIZE: 00000000
  POS: 00000000
  ADDR: 00000000
Cursor [0]:
  CNTR: 00000000
  POS: 00000000
  BASE: 00000000
Pipe [1]:
  Power: on
  SRC: 03ff02ff
  STAT: 10000202
Plane [1]:
  CNTR: 99000000
  STRIDE: 00001000
  SIZE: 02ff03ff
  POS: 00000000
  ADDR: 00000000
Cursor [1]:
  CNTR: 00000000
  POS: 00000000
  BASE: 00000000
CPU transcoder: A
  Power: on
  CONF: 00000000
  HTOTAL: 031f027f
  HBLANK: 03170287
  HSYNC: 02ef028f
  VTOTAL: 020c01df
  VBLANK: 020401e7
  VSYNC: 01eb01e9
CPU transcoder: B
  Power: on
  CONF: 80000000
  HTOTAL: 059f04ff
  HBLANK: 059f04ff
  HSYNC: 054f052f
  VTOTAL: 0336031f
  VBLANK: 0336031f
  VSYNC: 03280322

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: Incomplete

** Attachment added: "kern.logsnippet.txt"
   https://bugs.launchpad.net/bugs/1455852/+attachment/4398724/+files/kern.logsnippet.txt

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https://bugs.launchpad.net/bugs/1455852

Title:
  15.04 will not boot on MacBook 2,1

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  see: http://ubuntuforums.org/showthread.php?t=2274999&p=13286624#post13286624
  Lubuntu 15.04 on refit grub dual boot macbook 2,1 linux-image-3.16 will boot, though
  sometimes hangs but, reboot will work eventually.
  With linux-image-3.19 never,
  ? is the GPU hang reported in kern.log relevant here? i915 problem?
  see kern.log snippet attached
  see error attached from GPU crash dump saved to /sys/class/drm/card0/error

  This seems to be a BUG as suggested by the log:
  "...
  Please file a _new_ bug report on bugs.freedesktop.org against DRI -> DRM/Intel

  
  from:   /sys/class/drm/card0/error:

  
  GPU HANG: ecode -1:0x00000000, reason: Command parser error, iir 0x00008000, action: continue
  Time: 1431810790 s 799079 us
  Kernel: 3.16.0-25-generic
  Reset count: 0
  Suspend count: 0
  PCI ID: 0x27a2
  EIR: 0x00000010
  IER: 0x00028053
  PGTBL_ER: 0x00000102
  FORCEWAKE: 0x00000000
  DERRMR: 0x00000000
  CCID: 0x00000000
  Missed interrupts: 0x00000000
    fence[0] = 00000000
    fence[1] = 00000000
    fence[2] = 00000000
    fence[3] = 00000000
    fence[4] = 00000000
    fence[5] = 00000000
    fence[6] = 00000000
    fence[7] = 00000000
    fence[8] = 00000000
    fence[9] = 00000000
    fence[10] = 00000000
    fence[11] = 00000000
    fence[12] = 00000000
    fence[13] = 00000000
    fence[14] = 00000000
    fence[15] = 00000000
    INSTDONE_0: 0x7fffffc0
    INSTDONE_1: 0x00000000
    INSTDONE_2: 0x00000000
    INSTDONE_3: 0x00000000
  render command stream:
  bsd command stream:
  blt command stream:
  vebox command stream:
  bsd2 command stream:
  Active [0]:
  Pinned [0]:
  Num Pipes: 2
  Pipe [0]:
    Power: on
    SRC: 027f01df
    STAT: 90000a03
  Plane [0]:
    CNTR: 00000000
    STRIDE: 00000000
    SIZE: 00000000
    POS: 00000000
    ADDR: 00000000
  Cursor [0]:
    CNTR: 00000000
    POS: 00000000
    BASE: 00000000
  Pipe [1]:
    Power: on
    SRC: 03ff02ff
    STAT: 10000202
  Plane [1]:
    CNTR: 99000000
    STRIDE: 00001000
    SIZE: 02ff03ff
    POS: 00000000
    ADDR: 00000000
  Cursor [1]:
    CNTR: 00000000
    POS: 00000000
    BASE: 00000000
  CPU transcoder: A
    Power: on
    CONF: 00000000
    HTOTAL: 031f027f
    HBLANK: 03170287
    HSYNC: 02ef028f
    VTOTAL: 020c01df
    VBLANK: 020401e7
    VSYNC: 01eb01e9
  CPU transcoder: B
    Power: on
    CONF: 80000000
    HTOTAL: 059f04ff
    HBLANK: 059f04ff
    HSYNC: 054f052f
    VTOTAL: 0336031f
    VBLANK: 0336031f
    VSYNC: 03280322

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