On Fri, Jan 8, 2010 at 3:42 AM, Klistvud <[email protected]> wrote:
> Dne, 07. 01. 2010 16:08:40 je George napisal(a): > > On 1/7/10, Arthur Machlas <[email protected]> wrote: >> > On Thu, Jan 7, 2010 at 8:50 AM, George <[email protected]> wrote: >> > >> >> I just installed Debian on my laptop and I notice that the CPU fan is >> >> working much more than it used to work on windows. It must be that >> >> Debian changed the temperature threshold. How can I change it back? >> > > Apparently, ACPI implementations in laptops are buggy (or let's say > non-standardized) more often than not. I suspect M$ must have several > workarounds in place in order to run -- at least in general -- cooler and > more power-savvy than GNU/Linux. These workarounds may well be industry > secrets between M$ and the laptop vendors for all we know ... You may read a > write up on my humble experience with a heated, noisy, jumpy laptop (gosh, > sounds like my wife), by hopping over to the link provided at the end of my > post; just look for the heading "Laptops in Heat". There you'll find more > about ACPI, the thermal kernel module, the trip points and related stuff, > and also some relevant links for further reading. > > -- > Regards, > > Klistvud > Certifiable Loonix User #481801 > http://bufferoverflow.tiddlyspot.com > In addition to the info above, I use the PHC patch to allow undervolting of the CPU, or in my case CPUs. Without it on a default kernel my fan kicks in every 30 seconds or so. With it it doesn't kick in at all unless I do something like render video or compile a kernel. Haven't bothered to check the temp differences or do any real benchmarking. Best, Arthur
