My system fans always stay on... but again this is not in a laptop .. it
is on my regular pc...
=================================================================
| Kenneth Culver | FreeBSD: The best NT upgrade |
| Unix Systems Administrator | ICQ #: 24767726 |
| and student at The | AIM: muythaibxr |
| The University of Maryland, | Website: (Under Construction) |
| College Park. | http://www.wam.umd.edu/~culverk/|
=================================================================
On Thu, 21 Sep 2000, Mike Smith wrote:
> > My laptop does seem to run *MUCH* warmer than before as well. It runs
> > hot to begin with, but with the latest kernels it runs really hot. It
> > used to get this hot only when I compiled -j 4. I don't have ACPI
> > enabled and am using UP kernel. There really needs to be a HLT in the
> > idle loop to keep idle machines cools.
>
> If I remember from a discussion with John Baldwin, the reason we don't do
> this (yet) is that HLT only wakes up when you take an interrupt, and
> there are cases where we can't guarantee that we'll take an interrupt in
> order to get us out of the HLT.
>
> > The thermal management code, iirc, works in conjunction with this by
> > lower the clock rate when things aren't too loaded, but that is a
> > fairly complex thign to wait for. It also seems to help mostly on
> > lightly loaded machines. HLT helps more than you'd otherwise
> > think...c
>
> HLT helps a lot, yes, but the thermal management code is responsible for
> running the system fan(s) in ACPI mode as well as throttling the CPU. In
> some cases, that's a real issue (eg. I'm building the world now and
> extremely worried about how hot this system is because I forgot to turn
> ACPI off first. 8)
>
> --
> ... every activity meets with opposition, everyone who acts has his
> rivals and unfortunately opponents also. But not because people want
> to be opponents, rather because the tasks and relationships force
> people to take different points of view. [Dr. Fritz Todt]
>
>
>
>
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