[mcka]

1. no way to play an 720p or 1080p under ubuntu 9.04 with vdpau inside xbmc (alll the 100% cpu load)

2. same files play fine under xineliboutput (8-15% cpu load)

But realy strange is that i also cant play this files with mplayer commandline but the play fine inside gnome-mplayer (both time set -vo vdpau)

I also tested diff nvidia drivers (180.53 and 185.18.04) and with and without composite.

But there must be something wrong. There are people having success with xbmc on aspire revo out there:

http://translate.google.de/translate?u=h...e&ie=UTF-8

And I've seen XBMC with vdpau on another box with 9400 GeForce and Core2Duo, which had about 5 % CPU usage while playing 1080p mkv with high bitrate. Of course the atom 220 is far slower, but not by factor >20. Same with difference to xine...

There must be something wrong with your setup. Have you tried the live DVD?

edit:
Have a look at the comments from:
http://translate.google.de/translate?js=...ry_state0=

They say, that they used the 9.04 live DVD, the only change was setting HDMI as audio output device. They report to run 1080p with 20% CPU usage which sounds more reasonable to me than 100%.