DragonFly kernel List (threaded) for 2003-12
Re: Laptop getting hot
On Mon, Dec 29, 2003 at 11:07:58AM -0800, Matthew Dillon wrote:
> :> > I had neither apm nor acpi enabled and the fan did not turn on
> :> > at all. With DFBSD it start almost immediately, even without any load.
> :> > Do you have any idea, what could be causing this?
> :> Same thing happens to me with Dell Optiplex G240(a Desktop, though).
> :> When it's running FreeBSD-stable, the cooling fan is very calm, while with
> :> DragonFly the fan keeps turning noisily as if it's running buildworld.
> :> I haven't tried recent acpi code from FreeBSD-CURRENT, but it doesn't seem
> :> to have any CPU throttling feature.
> :I found that DragonFly box produces less heat when it's playing
> :some music with mpg321 from ports.
> :I did the following experiment with my Dynabook:
> I'm not sure what's going on... it should be in a halted state most
> of the time (i.e. 'hlt' instruction), unless there is something cpu
> bound running.
Speaking of 'hlt' instruction, if I revert the revision 1.22 of
sys/kern/lwkt_thread.c, the temperature stays low.