Comment 32 for bug 294972

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LinuxKrn (bugs-linuxlogin) wrote : Re: xorg 10-20% cpu usage after intrepid upgrade, general system sluggishness

A good guide already exists here:
https://wiki.ubuntu.com/DebuggingXorg

My testing was done simply with normal (non-debug and without symbols) with strace and gdb. It might be more useful to get full debug information out of X by following the guide above.