Fan control

[Alex Deucher]

On Fri, Aug 22, 2008 at 1:09 PM, Corbin Simpson
<mostawesomedude at gmail.com> wrote:
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> Alex Deucher wrote:
>> On Fri, Aug 22, 2008 at 7:38 AM, Martin <xorg-driver-ati at schwier.cc> wrote:
>>> AFAIK this "powerplay" feature is not yet implemented. I would
>>> appreciate if it would appear soon in the open source drivers as I think
>>> it is an important feature for notebooks. My unthrottled radeon card
>>> consumes much more energy and makes much more noise so I have to use
>>> fglrx (which still doesn't work with xserver 1.5)
>>>
>>> Perhaps some developer could tell us if and when we can expect the
>>> powerplay feature?
>>
>> I have some experimental testing code in my personal git tree:
>> http://cgit.freedesktop.org/~agd5f/xf86-video-ati/log/?h=agd-powerplay
>> But due to limitations in X, there's no clean way to change the power
>> mode on the fly.  I'm playing around improved powerplay support for
>> radeon kms.
>
> I can confirm that the code in the agd-powerplay branch shows changes of
> 3-5 degrees Celsius between each power state, and that compiz runs
> *much* slower at the lower states, so the code does what it says. If you
> need this support *now*, I keep a rebased and up-to-date version of this
> support in my repo.
>
> http://cgit.freedesktop.org/~csimpson/xf86-video-ati/log/?h=agd-powerplay

currently none of the power mode flags are handled so there are some
low power modes that don't work with 3D for example.  In those cases
we'll need to switch to a higher mode when 3D is active.

Alex