Comment 4 for bug 205087

Confirming for 2.6.24-16-generic.
CPU get throttled, according to "grep MHz /sys/devices", but there's no userspace interface.

$ cat /sys/devices/system/cpu/cpuidle/current_driver
acpi_idle

$ lsmod | grep cpu
cpufreq_powersave 2688 0
cpufreq_stats 7104 0
cpufreq_userspace 5284 0
cpufreq_ondemand 9740 1
cpufreq_conservative 8712 0
freq_table 5536 3 powernow_k8,cpufreq_stats,cpufreq_ondemand

$ dmesg | egrep 'cpu|power'
[ 39.675102] cpuidle: using governor ladder
[ 39.675150] cpuidle: using governor menu
[ 90.464446] powernow-k8: Found 1 AMD Athlon(tm) 64 Processor 3000+ processors (1 cpu cores) (version 2.20.00)
[ 90.464476] powernow-k8: 0 : fid 0xa (1800 MHz), vid 0x6
[ 90.464478] powernow-k8: 1 : fid 0x2 (1000 MHz), vid 0x12