I wish I could offer something substantive...

I've had my issues with
XBMC in the past, on PCLOS...but they seem to be well resolved, now. I just tested it again, in KDE (in case there was an issue with any recent updates), and it working OK. Are you sure your system is fully updated? I see your using
sudo...you configured this yourself? Are there any other possible modifications you've made (whether or not you think they may impact this issue directly, it may help in troubleshooting)?
Have you tried updating and installing using
Synaptic, instead of
apt-get (even though I use
apt-get, on occasion, when working with remote systems)...
You may have a configuration issue in your account, also. Have you tried creating a new user, and logging fresh and trying again (I like to have a user call
xbmc, which my kids know the password to, which has a session type of
xbmc, so they can watch movies, etc without impacting other areas of the PC).
Can't think of anything else to suggest (other than trying a new install, updated and only
xbmc added, and test that...but I consider that pretty extreme)
If I think of anything else, I'll post it...