EDIT: Never mind. Seems like it was a coincidence. I think the issue is actually with lxdm. I switched to lightdm and everything was fine. Feh.
I’ve an old Dell Mini 12, and I recently upgraded it to run Lubuntu 13.10, but ran into issues where Network Manager wouldn’t let me do anything, and attempting to reboot or shutdown while logged in would cause the machine to complain that I was not authorised to do so. After some hunting around, I discovered an IRC log with a solution to the issue.
First of all, open up the file
/etc/pam.d/common-session as root. You can do this from a terminal as follows:
$ sudo vim /etc/pam.d/common-session
Now, check that it contains the following line:
session optional pam_systemd.so
If not, add it. Once you’ve added it, have PAM update itself as with the following:
sudo pam-auth-update --force
And now the issue should be gone! You may need to log out and log back in again too.
I’m still having an issue with the wireless drivers themselves, which I haven’t been able to fix, even after installing the nonfree drivers package.