A few days ago I installed Ubuntu Karmic (alternate i386) on my PC. Everything is working fine, except that after I insert my password at GDM it takes *ages* to get to the desktop (about 16 seconds).  

Since I'm using LXDE I'd think login should be quite quick.. Any hint on what I could check? 

(the system itself isn't very old.. Pentium Dual-Core E5200 @ 2.50GHz, 2Gb RAM, 2 x 320Gb SATA HDs...)

**Edit:**  

Some more info: 

* If I logout and then relogin, it still takes 16 seconds to get to the desktop
* top during login says that CPU keeps under 10% usage, and swap isn't touched at all (0Kb used)