Loud loud Sun Ultra 45 SPARC

Came in to work this morning, at around 2 or 3 cubicles away from my desk. I heard a huge huge humming noise (sounds like somebody was vacumning.) Immediately I was afraid it's my machine and changed my mind next second because I thought it was just too loud. But unfortunately, it IS my machine. It was toally intolerable. I shut it down right away.

After around 10 minutes, I booted it up again. Thought the noise was getting better. But when I came back from the restroom, the huge humming started again. Googling "loud ultra 45" returned this link. Forget about the cables + fanctl suggestion. I tried the second suggestion.

It worked! But the noise still seems to cycle from quite to medieum loud especially I started to work on something after a long rest. Well, at least it doesn't look like it's due to refurbishment since other people had the same problem as well.

Steps:

1. Change to root
2. # vi /etc/power.conf

Add the following lines:

cpupm enable
cpu-threshold 15s

3. # pmconfig