Here is a bash script for acpi that underclocks the ati radeon 9700 on my laptop. Make sure to add an ac_adapter acpi event that calls the script:
#!/bin/bash
displaynum=0
user=`finger| grep -m1 ":$displaynum " | awk '{print $1}'`
echo $user
status=`acpi -a | grep on-line`
#echo $status
if [ "$status" ]
then
su $user -c "aticonfig --set-powerstate=3"
else
su $user -c "aticonfig --set-powerstate=1"
fi
Well, I’m done at Lawrence Livermore and I’m back in Boston for today, but I’m leaving tomorrow to go visit my family in Chicago. Somehow it ended up being easier to fly from San Francisco to Boston, and then buy a round trip flight from Boston to Chicago. Anway, I continuing my work at Livermore, and most importantly, keeping my supercomputer access.
Yesterday I went on a special tour of BlueGene/L and Purple, which are the fastest and third fastest supercomputers in the world. I saw several others as well. These are classified computers, so I was lucky to be able to see them because they are in a high security facility. They are amazing – BlueGene/L has 131,072 processors!