Public bug reported:

Booting kernel vmlinux and initrd out of the live image works and subiquity 
starts.
But after the "Configure proxy" screen (not sure if that matters, since the 
subiquity code is async) I faced this error:

                                                                             
                                 [ ERROR: hook 
/usr/share/apport/general-hooks/powerpc.py crashed:               [ Back       
]                               
                  Traceback (most recent call last):                          
                                                      File 
"/snap/subiquity/1538/usr/lib/python3/dist-packages/apport/report.py", line 
198, in _run_hook
                                                                            
symb['add_info'](report, ui)
                          File "/usr/share/apport/general-hooks/powerpc.py", 
line 42, in add_info
                     is_kernel = report['ProblemType'].startswith('Kernel') or 
'linux' in report.get('Package')
                               TypeError: argument of type 'NoneType' is not 
iterable


After typing enter (iirc) I cam back to the UI (or did it automatically
restarted):

  Guided storage configuration                                        [ Help ]
                                                                              

   ┌────────────────────────────────────────────────────────────────────────┐
   │                                                                        │
   │                       [ View full report      ]                     ▴  │
   │                                                                     █  │
   │  If you want to help improve the installer, you can send an error   █  │
   │  report.                                                            █  │
   │                                                                     █  │
   │                       [ Send to Canonical     ]                     █  │
   │                                                                     █  │
   │  You can continue and the installer will just present the disks     █  │
   │  present in the system and not other block devices, or you may be   █  │
   │  able to fix the issue by switching to a shell and reconfiguring the█  │
   │  system's block devices manually.                                   █  │
   │                                                                     █  │
   │                       [ Switch to a shell     ]                     █  │
   │                                                                     █  │
   │                       [ Continue              ]                     ▾  │
   │                                                                        │
   └────────────────────────────────────────────────────────────────────────┘

And I found this message in the log:

...
[    2.263543] hidraw: raw HID events driver (C) Jiri Kosina
 [    2.274054] usbcore: registered new interface driver usbhid
 [    2.274054] usbhid: USB HID core driver
 [    2.276563] input: HID 0557:2419 as 
/devices/pci0005:00/0005:00:00.0/0005:01:00.0/usb1/1-3/1-3.1/1-3.1:1.0/0003:0557:2419.0001/input/input0
...skipping...
 [  190.627586] platform regulatory.0: Direct firmware load for regulatory.db 
failed with error -2
 [  190.627590] cfg80211: failed to load regulatory.db
Date: Tue Mar 17 12:32:03 2020
DistroRelease: Ubuntu 20.04
ExecutablePath: /snap/subiquity/1538/usr/bin/subiquity
HookError_powerpc:
 Traceback (most recent call last):
   File "/snap/subiquity/1538/usr/lib/python3/dist-packages/apport/report.py", 
line 198, in _run_hook
     symb['add_info'](report, ui)
   File "/usr/share/apport/general-hooks/powerpc.py", line 42, in add_info
     is_kernel = report['ProblemType'].startswith('Kernel') or 'linux' in 
report.get('Package')
 TypeError: argument of type 'NoneType' is not iterable
 
InstallerLog:
 2020-03-17 12:30:00,778 INFO subiquity:117 Starting SUbiquity v0.0.5
 2020-03-17 12:30:00,778 INFO subiquity:118 Arguments passed: 
['/snap/subiquity/1538/usr/bin/subiquity', '--serial']
 2020-03-17 12:30:00,778 DEBUG subiquitycore.prober:35 Prober() init finished, 
data:None
 2020-03-17 12:30:00,779 DEBUG subiquitycore.core:97 KDGKBTYPE failed 
OSError(25:
, 'Inappropriate ioctl for device')
 2020-03-17 12:30:00,779 DEBUG asyncio:54 Using selector: EpollSelector
 2020-03-17 12:30:00,780 DEBUG subiquity.signals:50 connect_signal: 
network-proxy-set -> <function Subiquity.__init__.<locals>.<lambda> at 
0x716a4c0c58c8>
 2020-03-17 12:30:00,780 DEBUG subiquity.signals:50 connect_signal: 
network-change -> Subiquity._network_change
 2020-03-17 12:30:00,780 DEBUG subiquitycore.core:638 Application.run
 2020-03-17 12:30:00,783 DEBUG curtin:89 Running command ['dpkg', 
'--print-architecture'] with allowed return codes [0] (capture=True)
 2020-03-17 12:30:00,787 DEBUG subiquitycore.core:272 Importing controller: 
Early
 2020-03-17 12:30:00,787 DEBUG subiquitycore.core:272 Importing controller: 
Reporting
 2020-03-17 12:30:00,787 DEBUG subiquitycore.core:272 Importing controller: 
Error
 2020-03-17 12:30:00,788 DEBUG subiquitycore.core:272 Importing controller: 
Welcome
 2020-03-17 12:30:00,788 DEBUG subiquitycore.core:272 Importing controller: 
Refresh
 2020-03-17 12:30:00,788 DEBUG subiquitycore.core:272 Importing controller: 
Keyboard
 2020-03-17 12:30:00,788 DEBUG subiquitycore.core:272 Importing controller: 
Network
 2020-03-17 12:30:00,794 DEBUG subiquitycore.netplan:80 config for enP2p1s0f0 = 
{'dhcp4': True, 'match': {'macaddress': '0c:c4:7a:87:04:d8'}, 'set-name': 
'enP2p1s0f0'}
 2020-03-17 12:30:00,798 DEBUG subiquitycore.netplan:80 config for enP2p1s0f0 = 
{'match': {'macaddress': '0c:c4:7a:87:04:d8'}, 'set-name': 'enP2p1s0f0', 
'dhcp4': True, 'dhcp-identifier': 'mac', 'critical': True, 'nameservers': 
{'addresses': ['10.245.64.1'], 'search': ['maas.']}}
 2020-03-17 12:30:00,798 DEBUG subiquitycore.core:272 Importing controller: 
Proxy
 2020-03-17 12:30:00,798 DEBUG subiquitycore.core:272 Importing controller: 
Mirror
 2020-03-17 12:30:00,798 DEBUG subiquitycore.core:272 Importing controller: 
Refresh
 2020-03-17 12:30:00,798 DEBUG subiquitycore.core:272 Importing controller: 
Filesystem
 2020-03-17 12:30:00,798 DEBUG subiquitycore.core:272 Importing controller: 
Identity
...
 lspci: Unable to load libkmod resources: error -12
 0000:00:00.0 PCI bridge [0604]: IBM POWER9 Host Bridge (PHB4) [1014:04c1] 
(prog-if 00 [Normal decode])
        Device tree node: 
/sys/firmware/devicetree/base/pciex@600c3c0000000/pci@0
        Control: I/O- Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR+ FastB2B- DisINTx-
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- 
<MAbort- >SERR- <PERR- INTx-
        Latency: 0
        NUMA node: 0
        Bus: primary=00, secondary=01, subordinate=ff, sec-latency=0
        I/O behind bridge: 00000000-00000fff [size=4K]
        Memory behind bridge: [disabled]
        Prefetchable memory behind bridge: [disabled]
        Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- 
<MAbort- <SERR- <PERR-
        BridgeCtl: Parity- SERR+ NoISA- VGA- VGA16- MAbort- >Reset- FastB2B-
                PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
        Capabilities: [40] Power Management version 3
                Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA 
PME(D0+,D1-,D2-,D3hot+,D3cold+)
                Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
        Capabilities: [48] Express (v2) Root Port (Slot+), MSI 00

I've attached the full /var(log and /var/crash ...

** Affects: subiquity
     Importance: Undecided
         Status: New

** Affects: ubuntu-power-systems
     Importance: High
     Assignee: Canonical Foundations Team (canonical-foundations)
         Status: New


** Tags: ppc64el

** Attachment added: "17032020.tgz"
   
https://bugs.launchpad.net/bugs/1867780/+attachment/5337984/+files/17032020.tgz

** Also affects: subiquity (Ubuntu)
   Importance: Undecided
       Status: New

** Also affects: subiquity
   Importance: Undecided
       Status: New

** No longer affects: subiquity (Ubuntu)

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https://bugs.launchpad.net/bugs/1867780

Title:
  Problem with netbooting subiquity on s390x

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