intel video driver problem

[Larry Gingras]

I have a problem with acceleration features on my graphic adapter.
I have (according to Xorg.0.log) Integrated Graphics Chipset: Intel(R) 
965GM (it is ASUS laptop X80L).
When acceleration is enabled, some parts of windows sometimes became 
garbled. It seems like parts of video memory is littered. Image is only 
restored when affected regions is completely redrawn, minimize-restore 
of window do not restore garbled region (but image inside garbled region 
become different, it become part of desktop or something like that).
I tried to disable everything that use acceleration (disable composition 
in KDE, etc), even disable DRI but if acceleration is enabled in 
xorg.conf this bug remains. If I disable acceleration (with Option 
"Accel" "off") - everything works fine.
I tried to play with various options in xorg.conf but there are not many 
options to play with. Driver just ignores a lot of options (such as 
VideoRam). I tried change AccelMethod, but only EXA works for me (XAA 
and UXA make Xorg halt on starting graphic mode, I just have blank black 
screen and everything stop, I cannot switch back to console or kill X 
server).
Only completely disabling acceleration make things better.
I use FreeBSD 8.0-RELEASE, xorg 7.4, and intel video driver 2.7.1 (it is 
latest version currently present in ports).
I'm not sure it is bug in xorg driver or in kernel support (i915 and drm 
modules, btw I mention these are not loaded if acceleration is disabled).
It seems to me that it is some sort of memory allocation or access issue.

Please advice possible solutions.

BTW I think driver is severely outdated now. intellinuxgraphics.org have 
2.11.0 now. I tried to download it but I cannot build it (I think it is 
for linux only and must be ported to FreeBSD).