it happens after months without problems and without touching nothing

When i launch Euphoric (mode X) : it works, but a crazy scrolling begins
i tried to change video mode:
mode Q: the scrolling has disappeared, but i have 2 images, a normal screen and under there is half screen of another one

Scanlines: no effect
Configuration informations:
notebook HP pavilion(2005) - PentiumIV - ATI Radeon9600Mobility
Windows XP home SP2
If someone has an idea

Thanks for advices or solutions