ATI Mobility Radeon HD 4570 - Overheat issue

[Rafał Miłecki]

W dniu 1 lipca 2010 18:34 użytkownik Donato Capitella
<d.capitella at gmail.com> napisał:
> Thanks, you are very helpful. And sorry for the overheat
> misunderstanding, English is not my native language after all :P

No problem and thanks for replying to all :) One thing you could still
do is resigning from top-posting :) There exists great explanation for
that:

A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing in e-mail?

;)


> There is something I still don't understand. Suppose I try to use the
> 2.6.35 kernel... will things improve automagically or will I still
> need to tweak options inside xorg.conf to lower the temperature?

Power management is still not tested enough to make it enabled by
default. So you will have to do this on your own. It's really simple
however.

For static low mode:
echo profile > /sys/devices/pci0000\:00/0000\:00\:01.0/0000\:01\:00.0/power_method
echo low > /sys/devices/pci0000\:00/0000\:00\:01.0/0000\:01\:00.0/power_profile

For dynamic:
echo dynpm > /sys/devices/pci0000\:00/0000\:00\:01.0/0000\:01\:00.0/power_method

For static high mode:
echo profile > /sys/devices/pci0000\:00/0000\:00\:01.0/0000\:01\:00.0/power_method
echo high > /sys/devices/pci0000\:00/0000\:00\:01.0/0000\:01\:00.0/power_profile

You may need to replace PCI ID to match your PCI configuration.

Also make sure KMS is actually working for you (after switching to .35):
# dmesg | grep drm

In first lines you should see sth similar to:
[   14.955771] [drm] Initialized drm 1.1.0 20060810
[   16.140986] [drm] radeon defaulting to kernel modesetting.
[   16.140990] [drm] radeon kernel modesetting enabled.
[   16.144988] [drm] initializing kernel modesetting (...)

P.S.
So you don't need any extra xorg.conf options for KMS. Just sue
power_method and power_profile as described.

-- 
Rafał