combination of i810 based graphics card and wxga resolution does not work (possible solution included)

i have a notebook with a intel based graphics hardware. it was recognized by the edgy eft installer correctly and the i810 X.org driver was used. The laptops lcd has a resolution of 1280x800, and despite ubuntu correctly detecting this and putting it as resolution in xorg.conf 1024x768 is used, which gives a quite blurry look.

i checked the Xorg.0.log file and there was a line saying: '(II) I810(0): Not using mode "1280x800" (no mode of this name)'. i read on some sites that i810 based gfx cards sometimes have problems with certain resolutions not being present in bios, and in some cases a tool called "915resolution" could help here.

i did apt-get install 915resolution (i think it's in multiverse) and after installing there were a lot of post-install messages about resolution bugs corrected (i don't remember what they said exactly). however after that (mere installation), and without using the tool itsself the issue was fixed. an X restart gave me the 1280x800 resolution. the change the post-installation procedure did was obviously permanent, after reboots the resolution is still the correct one.

while it puzzles me that a mere installation of a packages triggers such tough stuff as changing some bios/gfx-hardware variables i am glad it worked, and i suggest maybe that the 915resolution package should be installed by default on wxga/i810 combinations.