vnc lockups

[David Timms]

Frank Cox wrote:
> Just within the past several days, I have started to have problems with my VNC
> session locking up when connected to a particular FC6 machine.  The local
> desktops on that machine work fine but a VNC session (through SSH) locks up
> after anywhere from several seconds to several minutes.
How did you configure the vnc tunnels ?

> By locking up I mean that the remote desktop window freezes and the terminal
> window that I initiated the SSH session through also freezes.  If I close both
> windows and re-open my session again then everything is just where it was
> before it locked up.
While you are using it ?  Screen saver not clicking in {black} and 
meaning no vnc data is sent, allowing the ssh session to timeout ? Or 
maybe a screensaver that is difficult to trasfer across modem ?
> 
> This happens continually.
With x minutes ? seconds ?
> 
> I can log into another machine running FC6 and run a VNC session on it with no
> lockups.
How different are the two machine ?
> 
> I can log into yet another machine on the same Internet connection as the
> "problem machine" (different IP address, same modem) that is still running FC5
> with no lockups as well.
perhaps try the low-bandwidth options for the vnc session.
> 
> Another person who uses the "problem machine" through a VNC connection is also
> complaining about lockups.

I have seen some lockups of the direct vnc session. In these cases 
{x86_64 on amd am2}, the clock continues to get updated, but the mouse 
doesn't active windows, nor the menus.

This required to ssh in, kill the vncserver, kill gnome-applet, and 
restart vncserver.

My suggestion: on the local console open some terminals for top, tail -f 
/var/log/messages, and ping some local network machine, and also run 
gkrellm, also , adjust the clock to show seconds.

See if there is any thing of note that happens when the session stops. 
Perhaps the modem begins retraining, causing timeouts or some such.

I am of course totally guessing ;)

Maybe another machine on the network with same mac address or ip address 
? turn the problem pair off, and ensure you can't find them via ping/nmap  ?

DaveT.