Comment 10 for bug 374284

thanks for the rename ;)

a possible cause: the Dell Inspiron 1521 uses the Radeon X1200 graphics for which the geniuses at AMD just clipped support in the fglrx driver, so that means the only acceptable performance is with the radeon driver (I haven't yet tried radeonhd with a non-RT kernel) and the radeon is unable to move bits fast enough to play full-screen AVI files and keep the sound synchronized. Perhaps that situation is made worse with a RT kernel?