[tlinux-users:08305] Re: GPU Fan problems on P100/105 series laptops

Manuel Aguilar pravi:
> I did the following:
> - Upgraded BIOS to 2.40
> - Upgraded alsa to 1.0.14rc1.
> - Changed the dsdt buggy code and recompile the module.
> - Built a 2.6.17 kernel including the new dsdt using make menuconfig
>
> Now, with acpi=on I can monitor temperature. Curiously, the laptop 
> gets less hot than before the bios upgrade.
>
> Manuel.
> ps. Mine is  a P100 with the 7300 chip.
>
> On 1/10/07, *Shaun Dennie* <[email protected] 
> <mailto:[email protected]>> wrote:
>
>     On 1/10/07, r1o2k3 <[email protected] <mailto:[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
>
>
My ACPI worked from the start (temp, baterry, suspend) except for GPU 
fan and sound. Now that i removed all the errors in DSDT fan and sound 
started working. And i must say that CPU temps are lower in Linux than 
in Windows.

Rok