From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jack Thomas Date: Thu, 25 Mar 1999 11:46:56 +0000 Subject: Enterprise 450 fan control Message-Id: List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: ultralinux@vger.kernel.org Hello, I hope this question isn't inappropriate to this list... After installing UltraLinux 1.1 on my Ultra Enterprise 450, I notice that the fans all run at full speed all the time, which is both noisy and energy innefficient. The Owner's Guide says the OS is expected to control environmental monitoring, and the PROM will automatically put the fans on full speed if the OS doesn't do this. So my question is: Has anyone written anything in linux to talk to a sun's environmental controls, or found a work-around to the problem, or have any other advice on this issue? Much obliged, Jack Thomas Systems Administrator College of Santa Fe jthomas@csf.edu