[MPlayer-users] stairstepping in my picture but only with dvds?!?

[justin case]

hi,

i get heavy sairstepping in diagonals using -vo vesa:vidix (ati
rage3d/mach64 driver) when playing dvds.
i am forced to use vesa and a resolution of 640x480 due to my tv-input
(vga).
playing xvid works fine. my xvid rips mostly come with a 640 resolution
anyway, so i guess the effect is caused by the rescaling-process wich vesa
is capable of doing in hardware afaik.
i know this card under windows with dvds and the effect is not there at all,
so it can do better. but how?
i tried software-rescaling already and i ended up with right the same stairs
:(

any ideas?

greetings,
/jc