That may just be due to the new mouse driver and/or input layer, which
went in some weeks ago. What kind of mouse (and if it is a PS/2 mouse, can
you get a loaner USB mouse to test with, for example?)
> Someone recently reported having similar problems and fixing them by
> disabling MTRR, but this cannot be the entire story since I never had it
> enabled in the first place. No wonder, on a dual P5 machine...
There was a separate MTRR atomicity problem that would cause extreme
slowdowns on SMP with MTRR enabled when X was started, because the MTRR
code would have re-entrancy problems and potentially leave the caches
disabled. That should have been fixed in 2.5.36.
Linus
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