[tlinux-users:08303] Re: GPU Fan problems on P100/105 series laptops

Shaun Dennie pravi:
> On 1/10/07, r1o2k3 <[email protected]> wrote:
>> I have P100-115 with Nvidia 7600 and i solved the problem. Problem is in
>> DSDT  tables (ACPI). DSDT on toshiba P100 is buggy, and has to be fixed
>> . How to do it is described in this tread of gentoo linux
>> http://forums.gentoo.org/viewtopic-t-444743-highlight-p100.html
>> and how to fix DSDT tables is written in
>> http://gentoo-wiki.com/HOWTO_Fix_Common_ACPI_Problems
>
> I tried this when I first got the machine (in fact, I even tried to
> figure out how to expose the fan control mechanism via the bios but
> wasn't able to) and I've never had any success at it (tried it again
> after seeing that gentoo forum explanation as well).  I've been
> working off the 2.4 BIOS with a 2.6.17 kernel and patched alsa drivers
> that play full sound with acpi=off.  It's possible that slight
> differences in models (conexant codec versions, etc) accounts for why
> it doesn't work for everyone.
>
>> Now that i fixed all the errors, my GPU fan started to work (low speed
>> all the time (45C)) and sound is also working. I always thought that
>> nvidia driver is responsible for turning on the fan, but it looks like
>> it is not. Maybe is only responsible for changing fan speed.
>
> Is that the same fan speed that you get with acpi=off or a slower speed?
>
>    Shaun
>
>
Slower (barely noticeable)  and i must say is better than windows policy 
where fan kicks in only when GPU temp is 60C. I hope this will not break 
the fan to quickly.

Rok