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

[Brian Wood]

On Saturday, October 23, 2010 04:56:01 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...

Do you think that mobo chipsets might make a difference here, as well as CPU clock speed?

Also, there are some VDPAU-capable video cards for a standard PCI interface, would these have a similar problem, 
recognizing of course the that the PCI bus is slower to start with than PCIExpress? Would tweaking PCI latency be able to 
minimize this?