[mythtv-users] Can't get glx to load

Jerry Rubinow jerrymr at gmail.com
Fri Jan 27 20:38:20 UTC 2006


On 1/27/06, Michael T. Dean <mtdean at thirdcontact.com> wrote:
> On 01/27/2006 03:16 PM, Jerry Rubinow wrote:
> > On 1/27/06, Michael T. Dean <mtdean at thirdcontact.com> wrote:
> >
> >> On 01/27/2006 02:57 PM, Jerry Rubinow wrote:
> >>
> >>> On 1/27/06, Michael T. Dean <mtdean at thirdcontact.com> wrote:
> >>>> On 01/27/2006 01:25 AM, Jerry Rubinow wrote:
> >>>>> Today I switched from an nvidia card to onboard sis, and in the
> >>>>> Xorg.0.log it's still trying to load nvidia's glx extension and
> >>>>> failing to initialize because I'm now loading the sis driver.
> >>> The main reason I want to reduce CPU usage at this point is that I'm
> >>> playing back 720p HD using libmpeg2 and the CPU is bouncing between
> >>> around 80% and 93%+, with the result that I'm getting stutter.  I'm
> >>> looking for anything that I can do to reduce the CPU load.  I'm
> >>> running a 2.8GHz P4, and I know people have talked about doing HD on
> >>> 2.4 GHz machines, so I'm not sure why it's so high.  I'm not running
> >>> any deinterlace.  Can't do XvMC on Sis.
> >> So, why are you getting rid of the NVIDIA card (which can do XvMC)?  I'd
> >> say the XvMC is your best bet.  Any other method of reducing CPU usage
> >> is likely to provide negligible gains during playback--that is any
> >> method short of transcoding HDTV to a lower resolution.
> >>
> > Because a Pundit motherboard only has PCI slots, and PCI doesn't seem
> > to have the bandwidth for HD.  I'm not sure how much lower XvMC's
> > bandwidth requirements are (if at all) than non-XvMC video, but I was
> > never able to get XvMC to play acceptably over the PCI.
> >
> > The on-board Sis, on the other hand, seems to have the bandwidth, and
> > I _should_ have the CPU, but I'm not sure why it's getting maxed out.
> > I compiled Myth with O3 and the processor-specific option.
> >
>
> Ahh.  So, at this point I have to punt and say my only suggestion is a
> different frontend :( or transcoding to a lower resolution.  Perhaps
> someone smarter has better suggestions.

I'm very close - maybe a 5% or 10% reductionin CPU might do it. 
Thanks for trying (and for the glx suggestions).

-Jerry


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