Guido had opened his ppa for freaks. ;)
The current libva is libva - 1.0.12-1~xup.
but.... the fact fglrx's va driver had been installed as:
/usr/lib/va/drivers/fglrx_drv_video.sooh god... :(
so I've linked to:
/usr/lib/dri/fglrx_drv_video.sobecause vainfo always watches above dirs to search for va driver in libva - 1.0.12-1~xup.
Then I could use xvba-video with libva (vaapi) successfully! oops. forgot to mention! you guys should use vaapi-patched player like mplayer... but to be honest, CPU usages didn't decreased so much. hehe :P