[mythtv-users] Nvidia 8400GS PCI, High Xorg CPU, Tearing

[Boleslaw Ciesielski]

Lee Koloszyc wrote:
> My Nvidia 6200 AGP died the other day, so I picked up an 8400GS PCI,
> thinking great I will be ready for the VDPAU and it should just be a pop
> it in and everything will work nicely.
> 
> This certainly hasn't been the case, the 6200 was able to playback 1080i
> video perfectly with xv on my LCD panel with a DVI-HDMI connection.
> During the instance the CPU would be around 75-80% with 60-65% coming
> from mythfrontend, the rest coming from X or other process.
> After replacing it with the 8400GS, I get loads of tearing and just a
> horrible looking picture, even with SD (though SD is watchable sort
> of). The problem seems to be with X windows taking more CPU time then
> mythfrontend, playing 1080i about 55% is going to X and 40% or so to
> mythfrontend.

I think the common wisdom is that the PCI bus does not have enough 
bandwidth for HD if you are not using VDPAU. With VDPAU the video stream 
passed to the card is still compressed, so it's fine.

Bolek