[tlinux-users:08301] Re: GPU Fan problems on P100/105 series laptops

yes thanks, have seen that link, but was hesitating to do such
low-level configs with disassembly etc.
Well, if there is no alternative, then I guess I have to find the
time and dig into it...

Jiri

On 1/10/07, r1o2k3 <[email protected]> wrote:
> 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
>
>
>