i810_drv.o doesnt work with i830. Bad refresh rate in xorg.conf

I already posted a bug report (#7599), but it was too bad to be understandable,
i will mark it as a duplicate of this one.

The i810_drv.o shipped with xorg 6.8.2 isnt working with i830 (at less mine),
after reporting this bug on bugs.freedesktop.org (
https://bugs.freedesktop.org/show_bug.cgi?id=2724) it appears that it will be
fixed (maybe for 6.8.3).

The second problem is that the refresh rate on my laptop are mis-detected by
xorg. On warty, there was predefined refresh rate in xorg.conf, but it seems
that they are not there anymore. Without them i can have a good resolution, i
guess it's the same for many people (or not :).

Thanks for your work,

kaouete