I'm running KDE 4.8 on Ubuntu 11.10. Two days ago I updated from 4.7 to 4.8 and yesterday there were a lot (75) packages I could update, which I did.
Today I started my PC and I have an extreme lag. Most stuff doesn't even react when clicked and it takes about 20s until I see the text I typed into textareas.
sudo top showed me that the CPU usage is very low (2-3%). Restarting the PC or the KDE plasma-desktop did not help either.
What am I supposed to do now? Is there any way to fix this without reinstalling KDE or the complete system?