powerpc 4.8.0-17 fails to boot on PowerMac G5

[Mathieu Trudel-Lapierre]

Not much else to say. The system fails to complete booting, it gets stuck somewhere before network comes up; with errors in syslog about missing symbols for some modules (see http://paste.ubuntu.com/23251408/). Boots fine in 4.4.0-21:

Sep 28 12:49:55 fujin kernel: [ 4.698092] uninorth_agp: Unknown symbol mcount (err 0)
Sep 28 12:49:55 fujin kernel: [ 4.715284] pps_core: Unknown symbol mcount (err 0)
Sep 28 12:49:55 fujin kernel: [ 4.731545] pps_core: Unknown symbol mcount (err 0)
Sep 28 12:49:55 fujin kernel: [ 4.759718] drm: Unknown symbol ence_release (err 0)
Sep 28 12:49:55 fujin kernel: [ 4.759781] hid: Unknown symbol mcount (err 0)
Sep 28 12:49:55 fujin kernel: [ 4.777863] ata_generic: Unknown symbol mcount (err 0)
Sep 28 12:49:55 fujin kernel: [ 4.798476] drm: Unknown symbol mcount (err 0)
Sep 28 12:49:55 fujin kernel: [ 4.815248] windfarm_core: Unknown symbol mcount (err 0)
Sep 28 12:49:55 fujin kernel: [ 4.826136] windfarm_core: Unknown symbol mcount (err 0)
Sep 28 12:49:55 fujin kernel: [ 4.846026] windfarm_core: Unknown symbol mcount (err 0)
Sep 28 12:49:55 fujin kernel: [ 4.862106] windfarm_core: Unknown symbol mcount (err 0)
Sep 28 12:49:55 fujin kernel: [ 4.882364] firewire_core: Unknown symbol mcount (err 0)
Sep 28 12:49:55 fujin kernel: [ 4.898322] hid: Unknown symbol mcount (err 0)
Sep 28 12:49:55 fujin kernel: [ 4.914094] hid: Unknown symbol mcount (err 0)
Sep 28 12:49:55 fujin kernel: [ 4.930108] hid: Unknown symbol mcount (err 0)
Sep 28 12:49:55 fujin kernel: [ 5.396683] windfarm_core: Unknown symbol mcount (err 0)
Sep 28 12:49:55 fujin kernel: [ 7.609956] autofs4: Unknown symbol cache_dir_open (err 0)
Sep 28 12:49:55 fujin kernel: [ 7.610137] autofs4: Unknown symbol mcount (err 0)
Sep 28 12:49:55 fujin kernel: [ 9.989854] parport: Unknown symbol mcount (err 0)
Sep 28 12:49:55 fujin kernel: [ 16.405448] shpchp: Unknown symbol mcount (err 0)
Sep 28 12:49:55 fujin kernel: [ 16.684111] ata_generic: Unknown symbol mcount (err 0)
Sep 28 12:49:55 fujin kernel: [ 16.826081] rack_meter: Unknown symbol mcount (err 0)
Sep 28 12:49:55 fujin kernel: [ 16.953962] i2c_algo_bit: Unknown symbol mcount (err 0)
Sep 28 12:49:55 fujin kernel: [ 16.977975] pps_core: Unknown symbol mcount (err 0)
Sep 28 12:49:55 fujin kernel: [ 17.010110] uio: Unknown symbol mcount (err 0)
Sep 28 12:49:55 fujin kernel: [ 17.022857] soundcore: Unknown symbol mcount (err 0)
Sep 28 12:49:55 fujin kernel: [ 17.034422] firewire_core: Unknown symbol mcount (err 0)
Sep 28 12:49:55 fujin kernel: [ 17.049942] windfarm_core: Unknown symbol mcount (err 0)
Sep 28 12:49:55 fujin kernel: [ 17.070474] uio: Unknown symbol mcount (err 0)
Sep 28 12:49:55 fujin kernel: [ 17.085972] windfarm_core: Unknown symbol mcount (err 0)
Sep 28 12:49:55 fujin kernel: [ 17.102451] windfarm_core: Unknown symbol mcount (err 0)
Sep 28 12:49:55 fujin kernel: [ 17.118814] uio: Unknown symbol mcount (err 0)
Sep 28 12:49:55 fujin kernel: [ 17.813073] hid: Unknown symbol mcount (err 0)
Sep 28 12:49:55 fujin kernel: [ 17.820183] hid: Unknown symbol mcount (err 0)
Sep 28 12:49:55 fujin kernel: [ 19.022406] bluetooth: Unknown symbol mcount (err 0)
---
ApportVersion: 2.20.3-0ubuntu7
Architecture: powerpc
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
DistroRelease: Ubuntu 16.10
HibernationDevice: RESUME=UUID=8c8a4ee6-57e4-4d02-9196-6c4620ee5883
InstallationDate: Installed on 2016-09-28 (1 days ago)
InstallationMedia: Lubuntu 16.04 LTS "Xenial Xerus" - Release powerpc (20160420.1)
IwConfig:
 lo no wireless extensions.

 enP1p5s4f1 no wireless extensions.

 enP1p5s4f0 no wireless extensions.
Lsusb:
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
 Bus 003 Device 002: ID 1e54:2030 TypeMatrix 2030 USB Keyboard
 Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 002 Device 003: ID 05ac:8207 Apple, Inc.
 Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Package: linux (not installed)
ProcFB: 0 nouveaufb
ProcKernelCmdLine: root=UUID=fd6c3ae7-7de7-416e-8bed-b4513658ee6d ro quiet splash verbose
ProcVersionSignature: Ubuntu 4.4.0-21.37-powerpc64-smp 4.4.6
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
 linux-restricted-modules-4.4.0-21-powerpc64-smp N/A
 linux-backports-modules-4.4.0-21-powerpc64-smp N/A
 linux-firmware 1.161
RfKill:
 0: hci0: Bluetooth
  Soft blocked: no
  Hard blocked: no
Tags: yakkety
Uname: Linux 4.4.0-21-powerpc64-smp ppc64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True

[Mathieu Trudel-Lapierre (cyphermox)]

apport information

[Mathieu Trudel-Lapierre (cyphermox)]

apport information

[Mathieu Trudel-Lapierre (cyphermox)]

apport information

[Mathieu Trudel-Lapierre (cyphermox)]

apport information

[Mathieu Trudel-Lapierre (cyphermox)]

apport information

[Mathieu Trudel-Lapierre (cyphermox)]

apport information

[Mathieu Trudel-Lapierre (cyphermox)]

apport information

[Mathieu Trudel-Lapierre (cyphermox)]

apport information

[Mathieu Trudel-Lapierre (cyphermox)]

apport information

[Mathieu Trudel-Lapierre (cyphermox)]

apport information

[Mathieu Trudel-Lapierre (cyphermox)]

apport information

[Tim Gardner (timg-tpi)]

This is quite odd. The symbol references in all of the module objects appear correct as they do in Module.symvers

[Tim Gardner (timg-tpi)]

One thing I noticed is that the missing symbol references are truncated from the original, e.g.,

mcount -> _mcount
cache_dir_open -> dcache_dir_open
iffies -> jiffies
ence_release -> fence_release

[Adam Conrad (adconrad)]

We had a veeeeeeery similar bug a year or two ago. Going to have to hunt down the reference and the commit that fixed it when I'm more sober/awake.

[Adam Conrad (adconrad)]

Ahh, it was https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1557130

[Tim Gardner (timg-tpi)]

We've been carrying a revert (Revert "powerpc: Simplify module TOC handling") since 4.6 because of FTBS. It is a possible candidate for this symbol resolution issue. Please try a test kernel from http://people.canonical.com/~rtg/powerpc-lp1628968/ which has dropped this revert.

[Mathieu Trudel-Lapierre (cyphermox)]

Updated kernel appears to boot correctly here now.

http://paste.ubuntu.com/23270584/

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux - 4.8.0-21.23

---------------
linux (4.8.0-21.23) yakkety; urgency=low

  [ Tim Gardner ]

  * Release Tracking Bug
    - LP: #1630279

  * powerpc 4.8.0-17 fails to boot on PowerMac G5 (LP: #1628968)
    - Revert "Revert "powerpc: Simplify module TOC handling""

  * Regression tests can not detect binfmt_elf mmpa semantic change
    (LP: #1630069)
    - SAUCE: apparmor: add flag to detect semantic change, to binfmt_elf mmap

  * Autofs parameter substitution broken in kernel 4.4.0-38 and 4.4.0-40
    (LP: #1629204)
    - SAUCE: (namespace) autofs4: Use real_cred for requestor's ids

 -- Tim Gardner <email address hidden> Tue, 04 Oct 2016 08:01:21 -0600