Bug#542687: gnome-panel does not interact with mouse over VNC

[Josselin Mouette]

Le jeudi 20 août 2009 à 15:41 -0400, Rob Mahurin a écrit :
> I am running GNOME under VNC.  For no obvious reason the panel has 
> recently become unresponsive.  To demonstrate I make a .vnc/xstartup 
> containing only 'xterm &', start a vnc session, and connect to it.
> >From that xterm I can start metacity (or not), and the gnome-panel.
> The panel appears but doesn't respond to clicks, and if it is obscured 
> (by for instance restarting metacity, so titlebars appear) it does not 
> redraw the obscured part.
> 
> Below my system information is a backtrace from running and interrupting 
> under gdb, with gnome-panel-dbg installed.
> (gdb) bt
> #0  0xb7f90424 in __kernel_vsyscall ()
> #1  0xb75c1321 in connect () from /lib/i686/cmov/libpthread.so.0
> #2  0x080a96ae in gdm_init_protocol_connection (data=0x80bcf7c)
>     at panel-gdm.c:252

This backtrace is very clear, but I have no idea what happens here. The
panel is trying to make a connection to the GDM socket, which lies
in /var/run/gdm_socket.

It appears that this connect() call locks up. If it doesn’t exist (GDM
not running), the syscall should fail immediately. Could it be that this
socket was left here after some previous GDM invocation, while it is no
longer running? This is the most obvious case for which this could
happen.

Cheers,
-- 
 .''`.      Josselin Mouette
: :' :
`. `'   “I recommend you to learn English in hope that you in
  `-     future understand things”  -- Jörg Schilling
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