Re: [Bugme-new] [Bug 12826] New: cpufreq driver do not expose all data and configuration to /sys

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On Sunday 08 March 2009 02:06:33 am Maciej Piechotka wrote:
> On Sat, 2009-03-07 at 15:00 +0000, Matthew Garrett wrote:
> > On Sat, Mar 07, 2009 at 12:09:29PM +0100, Maciej Piechotka wrote:
> > > # cat /proc/acpi/thermal_zone/THM0/trip_points
> > > critical (S5):           99 C
> > > passive:                 95 C: tc1=5 tc2=4 tsp=600 devices= CPU
> > >
> > > The problem is that it seems that the system halts at about 95 C - in
> > > moment when cooling should be applied. This might be an ACPI/ibm_acpi
> > > bug.
> >
> > Halts as in shuts down, or halts as in stops running? The R51e seems to
> > have the 32/64-bit ACPI address issue - can you try booting with
> > acpi=rsdt as a kernel argument and see whether it behaves any better?
>
> Somehow. It keeps system at 70-80 C but on 2.6.29 it freezes the
> computer when I log into Gnome (it seems that gdm is not enought and it
> occures after few minutes) - i.e. I cannot move pointer, change VT nor
> even ping the system (I use in-kernel radeon driver and Radeon Xpress
> 200M card RC410).

Hmm, I expect no PowerPlay things are implemented in the in-kernel radeon 
implementation yet?
fglrx and aticonfig --list-powerstates and aticonfig --set-powerstate X
could help a lot.
This could at least explain the high temperature rates.
Like that you could find out how much could be saved by graphics power 
savings.

> i.e. I cannot move pointer, change VT nor
> even ping the system (I use in-kernel radeon driver and Radeon Xpress
> 200M card RC410).
Sounds like the in-kernel radeon driver is not that stable yet?

Yang Zhao once implemented PowerPlay support in radeonhd userspace:
http://yangman.ca/git/xf86-video-radeonhd.git
diffing it with the official radeonhd driver and implementing the same
in the kernel's radeon driver might be necessary at some time?
I once played a bit with it and I could imagine as both should be atombios 
based, it shouldn't be that hard to port and it got already some testing on 
specific HW.
Matthew: Is it planned to add PowerPlay support to the radeon in-kernel driver 
at some time?
If yes, I can help a bit.

Hm, but all this has nothing to do with cpufreq which a Celeron is not capable 
of.

      Thomas
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