[mythtv-users] CPU performance governor vs disabling AMD Cool n Quiet

David Asher asherml at gmail.com
Sat Oct 23 23:49:25 UTC 2010

On Oct 23, 2010, at 6:56 PM, Jarod Wilson wrote:

> On Sat, Oct 23, 2010 at 5:44 PM, Jean-Yves Avenard <jyavenard at gmail.com> wrote:
>> On 24 October 2010 08:44, Jean-Yves Avenard <jyavenard at gmail.com> wrote:
>>> When AMD Coon n'Quiet is enabled, the default governor set the bus
>>> speed too low to properly feed the nvidia card for VDPAU usage. As
>>> such, VDPAU is unusable. Set the minimum frequency to be around
>>> 1.8GHz.
>> Forgot to add that it wouldn't be any different with a GT220
> Interestingly enough though, my main frontend box is an athon 64 x2
> (~2.7GHz, iirc) with a GT220. It runs with the ondemand cpufreq
> governor enabled, with both cores pretty much always throttled back to
> 1GHz, and it never has a single issue with vdpau playback...

Doesn't that make sense if the GT220 has dedicated memory, but the integrated chipset is using shared main memory?

Shared main memory would be subject to the processor scaling back the bus frequency, but dedicated memory would be clocked by the GT220 itself and not subject to the processor.


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