I'm trying to restart my X session and neither one of the methods I'm used to using are working on 11.10.
Is this a known bug?
If you are having this kind of issue, you can reboot the computer from the command line:
sudo reboot
Make sure to save any work you may have open. This command will not prompt you at all, and programs which want to block shutdown will most likely be unable to do so. This will bypass X. If for some reason this does not work, try adding the "--force" option:
sudo reboot --force
If you are unable to launch a terminal, you may be able to get to run a command with Alt+F2, but be sure to use "gksu" or "kdesu" instead of "sudo". If this doesn't work, press Ctrl+Alt+F5 (you can use any F key from F1 through F6), login, and proceed as above (using "sudo", not "gksu"). If you still cannot reboot the machine, use the magic sysrq key
If you don't want to reboot the whole computer, you may be able to fix it by sending a SIGHUP to kdm (or gdm or lightdm), but it sounds as if you already tried that. But in case you haven't:
pgrep dm -l
Look at the PID's printed for
12345 kdm
(or gdm or lightdm), and then send it a signal:
sudo kill -SIGHUP 12345
(replace 12345 with whatever number it output)
Here
With the Kubuntu 11.10
Stopping the KDM with the command:
sudo stop kdm
Why stop kdm:
/etc/init.d/kdm stop:
Since the script you are attempting to invoke has been converted to an
Upstart job, you may also use the stop(8) utility, e.g. stop kdm
Output:
Log of sudo stop kdm
Sat Oct 22 14:28:14 2011
kdm stop/waiting
Starting the KDM again with the command:
sudo start kdm
Output:
Log of sudo start kdm
Sat Oct 22 14:28:45 2011
kdm start/running, process 1698
If
If the KDM is not running, stopping the KDM and trying to stop the KDM again:
Log of sudo stop kdm
Sat Oct 22 14:31:12 2011
stop: Unknown instance:
sudo died with exit status 1
Logs
logsave:
man logsave
NAME
logsave - save the output of a command in a logfile
SYNOPSIS
logsave [ -asv ] logfile cmd_prog [ ... ]
DESCRIPTION
The logsave program will execute cmd_prog with the specified argument(s),
and save a copy of its output to logfile.
Earlier
With the Karmic
Searching with the: "stop: Unknown instance" -> http://ubuntuforums.org/showthread.php?t=1286032