[tlinux-users:08299] Re: GPU Fan problems on P100/105 series laptops

Shaun Dennie pravi:
> On 1/10/07, Jiri Dvorak <[email protected]> wrote:
>> Hi,
>>
>> this is interesting, is this the reason for the P100 being quite hot in
>> the lower left corner of the keyboard?
>>
>> And did you try the acpi=off boot? with what version of the nvidia 
>> drivers?
>
>
> Yes, that is the reason the laptop is very hot on the left side.
> Booting with acpi=off causes the fans to be on at all times which
> keeps the laptop very cool (Around 55/50C when running a 2D desktop
> and around 60/60C when running compiz/beryl) but disables useful
> things like battery monitoring, cpu control, and other acpi goodness.
> I've tried all the drivers from the late 8xxx ones to the 9746 (which
> I'm currently using).
>
>
>> I have 1.0-9746, and when I boot with acpi=off, my X Server won't
>> come up. Didn't investigate the error messages yet.
>>
>> The nvidia 1.0-9746 comes with a tool nvidia-settings, and that has
>> a Thermal Monitor section. There, the Slowdown Threshold is preset
>> at 115 degrees, and my current values of core and ambient temperature
>> are at 105 and 90 degrees.
>
> Right, that's what happens when the fans don't come on.  Although
> those temperatures are below the Slowdown threshold, they seem
> dangerously high to me and are probably hot enough to adversely affect
> other nearby system components.  After playing full screen, graphics
> intensive games for many hours, my laptop generally gets up to
> 70-75/70C with acpi=off as a comparison.  Very rarely I have seen the
> GPU temp get as high as 80C after many hours of gaming if my apartment
> is particularly hot.
>
> Until a proper fix is issued, I'd really recommend figuring out what
> your X problems are with acpi=off because, though your temperatures
> aren't likely to cause the computer to catch fire or anything (more
> likely to cause it to hang or shutoff), I can't imagine that 105/90C
> idle temperatures are good for the longterm health of the machine.
>
>    Shaun
>
>
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

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.

O yes and i use opensuse 10.1

Rok