[MPlayer-users] Very slow play with gl default

[Marcin 'Rambo' Roguski]

> I think it does not support my card (lspci tells it is a "G98 [GeForce
> 8400 GS]"), and nvidia proprietary drivers do not work with xen (which
> I use).

I think they did something recently to enable proprietary drivers with a
hypervisor, won't give you any details but it had something to do with
introducing their Tesla machines.
 
> But if it is CPU only, how can the performance be so different between
> x11 (mplayer taking around 20% CPU) and gl/gl2 (mplayer's CPU use >90%)?

Basically with gl you're doing the same thing twice, first on GL level, 
then doing it on X protocol level.