Mailinglist Archive: radeonhd (408 mails)

[Matthias Hopf <mhopf@xxxxxxx>]

On Jun 05, 09 18:54:44 +0200, Matthias Hopf wrote:
> After some discussion with AMD we found that there is a chance that with
> only some additional AtomBIOS calls we might be able to get to the same
> power levels as fglrx.
>
> With the following patch these are included, but only called if Option
> "ForceLowPowerMode" is active. I'd like to have this tested before

Unfortunately, these have no additional effect. Moreover, with the newer
cards (GDDR5 memory) the most power saving comes from lowering the
memory clock - something that probably cannot be done during runtime
without display glitches, and also something that didn't prove stable
enough yet according to Rafal's tests (because we don't wait correctly
for engine idle AFAIR).

> What we're still missing are
> - PCIe lane changes
> - Memory clock changes
> - Dynamic clock changes
> - Core voltage changes

This is still missing.

Matthias

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