Public bug reported:
Running x11vnc with either the -solid or -xrefresh options causes unity-
greeter to segfault once the VNC client connects.
To reproduce (assuming two machines named 'local-machine' and 'remote-
machine'):
1. ensure that nobody is logged in to 'remote-machine' (unity-greeter should
be displayed)
2. on 'local-machine' run:
ssh -L 5900:localhost:5900 remote-machine 'sudo \
x11vnc -localhost -auth /var/lib/lightdm/.Xauthority \
-display :0 -rfbport 5900 -nopw -solid black'
or:
ssh -L 5900:localhost:5900 remote-machine 'sudo \
x11vnc -localhost -auth /var/lib/lightdm/.Xauthority \
-display :0 -rfbport 5900 -nopw -xrefresh 5.0'
3. on 'local-machine', use a VNC client to connect to localhost:5900
unity-greeter on 'remote-machine' will then crash (causing lightdm to
respawn it), and the x11vnc program will print "caught XIO error" and
exit with a non-zero return code.
Neither of these options cause any problems when connecting via VNC when
a user is already logged in.
Additional details:
$ lsb_release -rdc
Description: Ubuntu 12.10
Release: 12.10
Codename: quantal
unity-greeter version: 12.10.4-0ubuntu5
x11vnc version: 0.9.13-1ubuntu1
libvncserver0 version: 0.9.9+dfsg-1
lightdm version: 1.4.0-0ubuntu2
** Affects: unity-greeter (Ubuntu)
Importance: Undecided
Status: New
** Attachment added: "backtrace.log"
https://bugs.launchpad.net/bugs/1086132/+attachment/3450844/+files/backtrace.log
** Package changed: lightdm (Ubuntu) => unity-greeter (Ubuntu)
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https://bugs.launchpad.net/bugs/1086132
Title:
x11vnc -solid or -xrefresh options cause unity-greeter to segfault in
gdk_window_get_type_hint()
Status in “unity-greeter” package in Ubuntu:
New
Bug description:
Running x11vnc with either the -solid or -xrefresh options causes
unity-greeter to segfault once the VNC client connects.
To reproduce (assuming two machines named 'local-machine' and 'remote-
machine'):
1. ensure that nobody is logged in to 'remote-machine' (unity-greeter
should be displayed)
2. on 'local-machine' run:
ssh -L 5900:localhost:5900 remote-machine 'sudo \
x11vnc -localhost -auth /var/lib/lightdm/.Xauthority \
-display :0 -rfbport 5900 -nopw -solid black'
or:
ssh -L 5900:localhost:5900 remote-machine 'sudo \
x11vnc -localhost -auth /var/lib/lightdm/.Xauthority \
-display :0 -rfbport 5900 -nopw -xrefresh 5.0'
3. on 'local-machine', use a VNC client to connect to localhost:5900
unity-greeter on 'remote-machine' will then crash (causing lightdm to
respawn it), and the x11vnc program will print "caught XIO error" and
exit with a non-zero return code.
Neither of these options cause any problems when connecting via VNC
when a user is already logged in.
Additional details:
$ lsb_release -rdc
Description: Ubuntu 12.10
Release: 12.10
Codename: quantal
unity-greeter version: 12.10.4-0ubuntu5
x11vnc version: 0.9.13-1ubuntu1
libvncserver0 version: 0.9.9+dfsg-1
lightdm version: 1.4.0-0ubuntu2
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/unity-greeter/+bug/1086132/+subscriptions
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