/usr/lib/ubiquty/wallpaper crashes after boot of livecd

[Ilya V. Portnov]

See attachements. LiveCD boots ok, but then /usr/lib/ubiquty/wallpaper crashes (all other work well).

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: ubiquity 2.12.16
ProcVersionSignature: Ubuntu 3.5.0-17.28-generic 3.5.5
Uname: Linux 3.5.0-17-generic i686
ApportVersion: 2.6.1-0ubuntu6
Architecture: i386
CasperVersion: 1.328
Date: Tue Nov 20 18:12:02 2012
InstallCmdLine: file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash -- maybe-ubiquity
LiveMediaBuild: Ubuntu 12.10 "Quantal Quetzal" - Release i386 (20121017.2)
MarkForUpload: True
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=ru_RU.UTF-8
 SHELL=/bin/bash
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[Ilya V. Portnov (portnov)]

buntu@ubuntu:~$ gdb /usr/lib/ubiquity/wallpaper
GNU gdb (GDB) 7.5-ubuntu
Copyright (C) 2012 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "i686-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /usr/lib/ubiquity/wallpaper...(no debugging symbols found)...done.
(gdb) run
Starting program: /usr/lib/ubiquity/wallpaper
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".
[New Thread 0xb6a68b40 (LWP 10061)]

** (wallpaper:10057): ERROR **: First parameter must be an existing background

Program received signal SIGTRAP, Trace/breakpoint trap.
0xb78293fd in g_logv () from /lib/i386-linux-gnu/libglib-2.0.so.0
(gdb) bt
#0 0xb78293fd in g_logv () from /lib/i386-linux-gnu/libglib-2.0.so.0
#1 0xb7829583 in g_log () from /lib/i386-linux-gnu/libglib-2.0.so.0
#2 0x08048d5b in ?? ()
#3 0xb75134d3 in __libc_start_main () from /lib/i386-linux-gnu/libc.so.6
#4 0x080491bd in ?? ()

[Oliver Grawert (ogra)]

in your gdb trace the app fails before it even gets to the point where it actually failed in your ubiquity-dm log ...
for valuable debugging data you need to call /usr/lib/ubiquity/wallpaper with a path to a wallpaper picture as the first argument so gdb gets to that point too.

[Dimitri John Ledkov (xnox)]

Nonetheless the crash was there:
Nov 20 16:55:44 ubuntu kernel: [ 33.063588] wallpaper[2813]: segfault at 3 ip b7202180 sp bfc51c30 error 4 in libgdk-3.so.0.600.0[b71ee000+7b000]

[Marcus Tomlinson (marcustomlinson)]

This release of Ubuntu is no longer receiving maintenance updates. If this is still an issue on a maintained version of Ubuntu please let us know.

[Launchpad Janitor (janitor)]

[Expired for ubiquity (Ubuntu) because there has been no activity for 60 days.]