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[Brad Figg <brad.figg@xxxxxxxxxxxxx>]

This bug is missing log files that will aid in diagnosing the problem.
>From a terminal window please run:

apport-collect 1455852

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

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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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