Ask Ubuntu is a question and answer site for Ubuntu users and developers. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I'm not doing anything in particular but Xorg is currently using 8-15% of my CPU and Compiz is using 5-15% as well. I have 4 virtual desktops (aka workspaces) and like 10 windows open but I see no reason why it should be using this much cpu.

I'm using 12.10 on a Asus UX31a, does anybody have hints to lower the cpu usage?

share|improve this question
Crying that Xorg and compiz with 4 virtual desktops and 10 windows open is like crying that Porsche Cayenne burns 20 liters of petrol for 100 km [; But seriously, if you want better perfomence, consider switching to other desktop environment. Start from here:… – Melon Mar 12 '13 at 18:55
+1 for the link to a very nice (optically pleasing and informative) page! – nutty about natty Mar 12 '13 at 19:28
I agree that 20 % seems "high" (esp. on state-of-the-art hardware) and might be an indication that there's still a lot of slack in your current configuration -- or that there's some "bug" beneath it. There's very likely a lot of fine-tuning, tweaking and optimizing you can do on your "Porsche" (to quote Melon), e.g. with CCSM or Ubuntu Tweak dot com or manually with gconf-editor or dconf-editor... details of which are covered in ample detail in other Q&A's. – nutty about natty Mar 12 '13 at 19:36
A working solution is described here - I hope it helps you as much as it helped me! – Torben Gundtofte-Bruun Jun 23 '15 at 21:30

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Browse other questions tagged or ask your own question.