Comment 13 for bug 326149

I am also affected by this. CPU's slow to respond to increased demand while in On Demand mode set by Frequency Scaling applet. Resulting in applications greying out for a few moments.

I am going to try the fix posted by Rocko
*********
Modifying /etc/init.d/ondemand (this sets both CPUs' up threshold to 40):

  echo -n ondemand > $CPUFREQ
  # set a more aggressive upscale factor. This should set both cpu0 and cpu1
  echo -n 40 > /sys/devices/system/cpu/cpu0/cpufreq/ondemand/up_threshold
*********
Ubuntu Karmic 9.10
AMD Turion X2 64
32 bit OS
3 GB RAM

uname -a
Linux UUE-2-laptop 2.6.31-20-generic #58-Ubuntu SMP Fri Mar 12 05:23:09 UTC 2010 i686 GNU/Linux