lightdm-webkit-greeter crashed with SIGSEGV in __lll_lock_wait()

[Kostya Vasilyev]

Was trying to use lightdm-webkit-greeter on Ubuntu 13.04, installed from apt-get

/etc/lightdm/lightdm.conf:

[SeatDefaults]
user-session=ubuntu
greeter-session=lightdm-webkit-greeter

/etc/lightdm/lightdm-webkit-greeter.conf:

[greeter]
background=/usr/share/backgrounds/warty-final-ubuntu.png
theme-name=Ambiance
webkit-theme=default
font-name=Ubuntu 11
xft-antialias=true
xft-dpi=96
xft-hintstyle=slight
xft-rgba=rgb

Booting the system does not show a greeter.

Running lightdm --test-mode --debug ends with:

[+0.08s] DEBUG: Connecting to XServer :1
[+0.08s] DEBUG: Starting greeter
[+0.09s] DEBUG: Started session 5806 with service 'lightdm-greeter', username 'kman'
[+0.10s] DEBUG: Session 5806 authentication complete with return value 0: Success
[+0.10s] DEBUG: Greeter authorized
[+0.10s] DEBUG: Logging to /home/kman/.cache/lightdm/log/x-1-greeter.log
[+0.10s] DEBUG: Session 5806 running command /usr/lib/lightdm/lightdm-greeter-session /usr/bin/lightdm-webkit-greeter

The test window (Xephyr) is just black, nothing showing... same as when the system is allowed to boot with webkit greeter enabled.

ProblemType: Crash
DistroRelease: Ubuntu 13.04
Package: lightdm-webkit-greeter 0.1.2-0ubuntu1
ProcVersionSignature: Ubuntu 3.8.0-12.21-generic 3.8.2
Uname: Linux 3.8.0-12-generic x86_64
ApportVersion: 2.9.1-0ubuntu1
Architecture: amd64
Date: Tue Mar 12 21:47:13 2013
ExecutablePath: /usr/bin/lightdm-webkit-greeter
InstallationDate: Installed on 2012-11-19 (112 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
MarkForUpload: True
ProcCmdline: /usr/bin/lightdm-webkit-greeter
ProcEnviron:
 LANGUAGE=en_US:en
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7f6414c019f0 <_ZN3WTF23waitForThreadCompletionEj+128>: cmpb $0x0,0x4(%rax)
 PC (0x7f6414c019f0) ok
 source "$0x0" ok
 destination "0x4(%rax)" (0x00000004) not located in a known VMA region (needed writable region)!
SegvReason: writing NULL VMA
Signal: 11
SourcePackage: lightdm-webkit-greeter
StacktraceTop:
 __lll_lock_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
 _L_lock_1035 () from /lib/x86_64-linux-gnu/libpthread.so.0
 pthread_mutex_lock () from /lib/x86_64-linux-gnu/libpthread.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
 g_file_new_for_path () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
Title: lightdm-webkit-greeter crashed with SIGSEGV in __lll_lock_wait()
UpgradeStatus: Upgraded to raring on 2013-03-08 (4 days ago)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo wireshark

[Apport retracing service (apport)]

StacktraceTop:
 __lll_lock_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:133
 _L_lock_1035 () from /tmp/apport_sandbox_8XXT5n/lib/x86_64-linux-gnu/libpthread.so.0
 __GI___pthread_mutex_lock (mutex=0x937590) at pthread_mutex_lock.c:85
 _g_io_module_get_default (extension_point=extension_point@entry=0x7f641383cbfb "gio-vfs", envvar=envvar@entry=0x7f6413845262 "GIO_USE_VFS", verify_func=verify_func@entry=0x7f64137c3140 <g_vfs_is_active>) at /build/buildd/glib2.0-2.35.8/./gio/giomodule.c:809
 g_vfs_get_default () at /build/buildd/glib2.0-2.35.8/./gio/gvfs.c:199

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[M4he (mahe)]

Black screen with lightm-webkit-greeter on Xubuntu 13.04 as well!