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
apport information