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[Scott Moser <smoser@xxxxxxxxxx>]

apport information

** Attachment added: "UdevDb.txt"
   https://bugs.launchpad.net/bugs/1552319/+attachment/4586758/+files/UdevDb.txt

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https://bugs.launchpad.net/bugs/1552319

Title:
  boot slow/timeout on power8 powerNV

Status in linux package in Ubuntu:
  Confirmed
Status in linux source package in Xenial:
  Confirmed

Bug description:
  After poking/hacking through bug 1551937, I'm able to get through the MAAS install of my xenial system 'gregory-ppc64'.
  It hangs on boot though with the attached console log.

  For google, the start of what looks sour is:
  [   41.113758] sd 0:2:5:0: alua: port group c29c state A preferred supports TOlUSNA
  [   61.000096] INFO: rcu_sched self-detected stall on CPU[   61.000109]        23-...: (2 GPs behind) idle=a8f/2/0 softirq=176/177 fqs=5245
  [   61.000109]   (t=5251 jiffies g=-94 c=-95 q=10862)
  [   61.000140] Task dump for CPU 23:
  [   61.000141] swapper/23      R  running task        0     0      1 0x00000804
  [   61.000145] Call Trace:
  [   61.000154] [c000000ff081f090] [c0000000000fb740] sched_show_task+0xe0/0x180 (unreliable)
  [   61.000159] [c000000ff081f100] [c00000000013e594] rcu_dump_cpu_stacks+0xe4/0x150
  [   61.000162] [c000000ff081f150] [c000000000143ca4] rcu_check_callbacks+0x6b4/0x9b0
  [   61.000164] [c000000ff081f280] [c00000000014bb08] update_process_times+0x58/0xa0
  [   61.000168] [c000000ff081f2b0] [c000000000162bb8] tick_sched_handle.isra.6+0x48/0xe0
  [   61.000171] [c000000ff081f2f0] [c000000000162cb4] tick_sched_timer+0x64/0xd0
  [   61.000173] [c000000ff081f330] [c00000000014c634] __hrtimer_run_queues+0x134/0x470
  [   61.000176] [c000000ff081f3c0] [c00000000014d66c] hrtimer_interrupt+0xec/0x2c0
  [   61.000182] [c000000ff081f480] [c00000000001f59c] __timer_interrupt+0x8c/0x290
  [   61.000184] [c000000ff081f4d0] [c00000000001f950] timer_interrupt+0xa0/0xe0
  [   61.000186] [c000000ff081f500] [c000000000002714] decrementer_common+0x114/0x180
  [   61.000189] --- interrupt: 901 at queue_work_on+0xc8/0xf0
  [   61.000189]     LR = queue_work_on+0xbc/0xf0
  [   61.000193] [c000000ff081f7f0] [c00000000060bd94] cursor_timer_handler+0x44/0x80 (unreliable)
  [   61.000195] [c000000ff081f820] [c000000000149d3c] call_timer_fn+0x5c/0x1c0
  [   61.000197] [c000000ff081f8b0] [c00000000014a1fc] run_timer_softirq+0x31c/0x3f0
  [   61.000200] [c000000ff081f980] [c0000000000be9b8] __do_softirq+0x188/0x3e0
  [   61.000203] [c000000ff081fa70] [c0000000000bee88] irq_exit+0xc8/0x100
  [   61.000206] [c000000ff081fa90] [c00000000001f954] timer_interrupt+0xa4/0xe0
  [   61.000212] [c000000ff081fac0] [c000000000002714] decrementer_common+0x114/0x180
  --- 
  AlsaVersion: Advanced Linux Sound Architecture Driver Version k4.4.0-9-generic.
  AplayDevices: Error: [Errno 2] No such file or directory
  ApportVersion: 2.20-0ubuntu3
  Architecture: ppc64el
  ArecordDevices: Error: [Errno 2] No such file or directory
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D3p', '/dev/snd/controlC0', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
  Card0.Amixer.info: Error: [Errno 2] No such file or directory
  Card0.Amixer.values: Error: [Errno 2] No such file or directory
  DistroRelease: Ubuntu 16.04
  IwConfig: Error: [Errno 2] No such file or directory
  Lsusb:
   Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  Package: linux (not installed)
  ProcEnviron:
   TERM=screen
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 radeondrmfb
  ProcKernelCmdLine: root=/dev/mapper/mpath0-part2 ro console=hvc0
  ProcLoadAvg: 1.73 0.72 1.21 1/1203 6707
  ProcSwaps:
   Filename				Type		Size	Used	Priority
   /swap.img                               file		8388544	0	-1
  ProcVersion: Linux version 4.4.0-9-generic (buildd@bos01-ppc64el-002) (gcc version 5.3.1 20160225 (Ubuntu/IBM 5.3.1-10ubuntu2) ) #24-Ubuntu SMP Mon Feb 29 19:28:28 UTC 2016
  ProcVersionSignature: Ubuntu 4.4.0-9.24-generic 4.4.3
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-9-generic N/A
   linux-backports-modules-4.4.0-9-generic  N/A
   linux-firmware                           1.156
  RfKill: Error: [Errno 2] No such file or directory
  Tags:  xenial uec-images xenial uec-images
  Uname: Linux 4.4.0-9-generic ppc64le
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:
   
  _MarkForUpload: True
  cpu_cores: Number of cores present = 20
  cpu_coreson: Number of cores online = 19
  cpu_dscr: DSCR is 0
  cpu_freq:
   min:	3.693 GHz (cpu 80)
   max:	3.694 GHz (cpu 39)
   avg:	3.693 GHz
  cpu_runmode:
   Could not retrieve current diagnostics mode,
   No firmware implementation of function
  cpu_smt: SMT=8

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