longhaul in 2.6.9 hangs VIA EPIA MII12000 when switching frequencies

[Petr Konecny <konecny@gmail.com>]

Hi,

the following script hangs my EPIA MII12000 within 5 seconds:
echo userspace >  /sys/devices/system/cpu/cpu0/scaling_governor
while true
do
   echo 532000 > /sys/devices/system/cpu/cpu0/cpufreq
   echo 1197000 >  /sys/devices/system/cpu/cpu0/cpufreq
done

When I run powernowd the system also crashes, usually when the
CPU/disk load changes often. Unfortunately this machine is headless so
I have no oops. Even netconsole is silent.

scaling_available_frequencies:
532000 1197000 598000 731000 798000 931000 1064000 665000 864000
997000 1130000 1197000

The motherboard has 1.2 GHz VIA Nehemiah CPU, cpu family 6, stepping 9. 
Loading longhaul prints:
longhaul: VIA C3 'Nehemiah C' [C5N] CPU detected.  Powersaver supported.

I can do more tests upon request. Would compiling with debugging
reveal any secrets ?
                                                           
Thanks, Petr