I've got an Sun Ultra 1 running Solaris 8. I power up all the peripherals, then turn on the computer and login as root. If I just leave the machine running, after a while, it powers down and goes to the boot prompt / init 0 and the hard disks spin down. I've disabled the Power Management.. shouldn't the computer just stay up and running? What's up? I want the machine simply to stay up and continuously running? What else do I need to do? Thanks.

Try to look to the /etc/power.conf file. At the last line, you see something like shutdown or default. Replace it by noshutdown and restart the power deamon : /etc/init.d/power stop /etc/init.d/power start That's all.

I commented out everything in that file - /etc/power.conf except the noshutdown, powered down and powered up. That still did not do it. The CPU still continues to shut completely off after about 15-20 minutes. I get an alert message that says root is shuting down the machine and then the CPU is powered off.. Is there a variable at the ok prompt, or maybe another conf file that needs to be changed?

What are the messages before the machine shuts-down?

Im guessing the reason its shutting down all the time is because you chose to use the power-saver mode when you first installed solaris. How about just renaming /etc/init.d/power to _power or something like that... ?

Problem solved. Simply took off the cover, and found there was a ton of dust on the fan and around the power supply. Cleaned up the inside - it runs like a new machine. Its embarrassing how simple that was..