Hi - I've been setting my laptop for power management by following the Power Management Guide and have successfully got cpufreqd running. However the CPU still gets hot on large compiles. I thought maybe changing the throttling state would cool things off but when I run the command from the power management guide 

echo -n "0:T1" > /proc/acpi/processor/C000/limit 

it returns the error 

-bash: echo: write error: Invalid argument

I tried opening the file with nano -w and got the same message when saving the changes. Can anybody give me any help? 

Thanks, Richard