Originally Posted by zim2dive
are you saying the GPU is not involved? (how does changing from 173 to 177 make such a dramatic difference.. 20-30 fps with 173, less than 2 fps with 177/180)
I did not say its not involved - its just very likely that it doesn't do a lot when watching video because most is done by the CPU anyway (it only displays images renderd by the CPU). So maybe the upload paths in the driver got somehow mangled, and flash is now hitting some ugly fallback-cases.
However, 173. was the last driver with the poor 2D accaleration, maybe it has something to do with pixmaps beeing allocated in vram by default.