Enabling backports repository for 12.04

[monon]

I am using Kubuntu 12.04 LTS, newly installed after a hard disk crash. I was also using 12.04 previously, up to the crash, and I had the backports repository enabled, mostly because I wanted to get the latest KDE updates. One problem I know I had was that I could not use the logout feature. The system would hang and I would have to power down and start over. Could this have been caused by some incompatibility between KDE 4.12.0 and Kubuntu 12.04? If I re-enable the backports repository, am I just asking for trouble?

Thank you to all.

[Jimmy.P]

I don't have that problem you have. Running 12.04 with kde 4.12.

[monon]

Well, thank you, Jimmy. I will enable the backports and see what happens.

[monon]

I ended up with the same problem again. It happens when I enter the leave menu from the desktop. I have three choices, one of which is Logout. Selecting Logout causes the system to hang. It seems the only way out is to reboot, In order to reboot safely I have to go to a terminal (ctrl-alt-F2), login and do a shutdown or init 6. Maybe the next KDE update will fix the problem.

[SteveRiley]

Try this.

1. Log in as normal

2. Switch to a console TTY

3. Run

sudo service lightdm stop

4. Run

sudo rm -rfv /var/tmp/kdecache-$USER

5. Run

sudo reboot

6. Log in again, and then try to log out

Can you now log out successfully?