For some time, I noticed that my xorg process uses up between 60 and 100% of the CPU (according to
top). I also noticed that interactive work becomes sluggish, even on my multi-core i7 processor.
After reading several threads on xorg and CPU load, I investigated and found Dropbox to be the culprit. If I disable Dropbox (or just pause the syncing), xorg CPU usage goes down to normal (a few percent).
Any idea what's going on and what can be done about it? It is not like Dropbox is doing anything—there are very few files in the folder and all are perfectly synced already.
I am running Kubuntu 12.10 with X.org 1.13.0 and Dropbox 1.4.0.