Hi, > In fact the problem seems related to compiz. If i disable desktop > effects. The computer is usable all the time with compiling. I have had exactly the same problems - The fact is compiz is not fully mature and these sorts of things can occur. The problem, is compiz/X requires considerably more cpu than a simple X session, and when your cpu is overloaded with other things it can start to impact on your interactive X performance, as you have seen. There are a few things you can try. A simple thing is to also start any process which is likely to be cpu intensive at a high nice value, higher than 0 the default for interactive processes. i.e if you normally run > foo instead try > nice -n 10 foo which instead will run foo at a nice value of 10. 0 is the highest priority a user (other than root) can give a process, and has the highest priority. 19 is the lowest priority (or most 'nice') Alternatively, you could try playing with schedtool to give X more priority than it normally has. Be careful though not to give it too much priority, since it you do your system can really suffer. http://linux.derkeiler.com/Mailing-Lists/Fedora/2006-10/msg03995.html cheers Chris
