[FernetMenta]

This is not just a simple fix. I have been working on improvements for Linux for more than a year. This includes the problem mentioned as well as e.g. fixing multi-screen setups. Approximately 10.000 new lines of code waiting for review. Give it a little time for testing.
wsnipex has enabled vdpau in the XvBA testing repo, You can try this: http://forum.xbmc.org/showthread.php?tid=116996

Or check out: http://www.xbmcfreak.nl/en