well first off, you should know that the Intel graphics stack in linux sucks...
however, that being said you still might be able to increase performance of the card.
myself, i use the radeon OSS driver. if i setup xorg.conf (which fedora doesn't use by default, as it
auto-configures x11 on boot) then i am able to change around settings and switch modes.
I can't offer you tips on your hardware directly, but if you google around i am sure there are Intel graphical
tweaks and different modes for that driver/xorg....
I too am having some GFX problems right now, i was hoping by fedora 13 (which i just installed) would have fixed them, but apparently not.... i currently have to disable 3d acceleration as of kernel 2.6.33 ,
i have been waiting for a while to see Radeon and kernel-mode-setting to be fixed, but it is still garbage.
are you using 2.6.33???
if so, you are probably using KMS - which by all popular reviews isn't all that good yet. in some cases,
people are experiencing upto a 25% LOSS in graphical performance...
i believe that you can still use UMS - user mode-switching, which may speed up your graphics. however, because i do not use intel, you will have to search around.
I can't use either right now
i wish upstream hadn't pushed KMS through so fast. now, so many people are having big issues
under the new methods/drivers/implementatons. i am disappointed with the linux kernel team right now, and if these problems aren't resolved soon, i will stop using linux on my laptop, until a buy a new one...
sorry i can't help more, but i just don't know enough about Intel graphics.