Comment 154 for bug 803943

Ben, the data is inadequate because perf is failing to relate unity and compiz functions to the high CPU usage listed next to the kernel and nvidia driver. This does not mean the kernel or nvidia are to blame. It just means that the perf tool does not have enough information to get usable call stacks relating the high CPU usage to the areas of unity and compiz causing it.

I believe the solution to this is probably to install debug symbols for the unity and compiz packages. If you know how to do this then please try. If not, then please wait till I have written some better instructions.