Re: Strange video playback problems (2.6 kernels)
Similar problem here. I use two cards... MX460(AGP) + MX420(PCI).
Run a 2.4 kernel & everything is fine. Boot into a 2.6 kernel & the performance of the PCI card dies.
With 2.6, running Xine (or mplayer, or MythTV) on the AGP card is fine, but try to run it on the PCI card & X uses 80% of the CPU time with Xine dropping frames like crazy. Shrinking the window size does nothing. Drop back to a 2.4 kernel and everything runs fine.