I915 3d acceleration - picture shifts

[vvp]

Hello!

I use FreeBSD 6.1 on HP nx6110 laptop. After fresh installation the drm module 
for i915 didn't work.
I've found a patch for i915 to make it work. After that 3d acceleration is 
works, but I've got another issue:when running KDE screensavers, picture is 
shifted up. That is probably not a drm driver issue as I saw similar thing on 
a SuSE linux box with i810 graphics chipset.
Have anyone ever seen a solution?