Well, most of the time the desktop works well in regular mode, for example, today it hasn't frozen (yet :-) ) so I haven't tried running it in recovery mode.
I've tried fixing broken packages, but there aren't any...
karnaf@myhost:~$ sudo dpkg --configure -a
[sudo] password for karnaf:
karnaf@myhost:~$ sudo apt-get install -f
Reading package lists... Done
Building dependency tree
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 11 not upgraded.
When it gets stuck, is there a chance I can find anything in any log after restarting it?
Thanks for the help!