Check the X & kernel version. Does FC 5 have X.org v 7.x?
My kernel is 2.6.17. It is the official Fedora Core 5 RPM kernel.
I have X.org 7.0. Anyway here is what I did to check it: [rishi@Sunflower X11]$ Xorg -version
X Window System Version 7.0.0 Release Date: 21 December 2005 X Protocol Version 11, Revision 0, Release 7.0 Build Operating System:Linux 2.6.9-34.ELsmp i686Red Hat, Inc. Current Operating System: Linux Sunflower 2.6.17-1.2157_FC5 #1 Tue Jul 11 22:55:46 EDT 2006 i686 Build Date: 30 June 2006 Before reporting problems, check http://wiki.x.org to make sure that you have the latest version. Module Loader present [rishi@Sunflower X11]$
Also, the kernel should use the i915 driver for this card, as I do on my old Toshiba laptop with 855GM and I get very decent 3D support.
I think I am using the i810 driver. My guess was it should be i915 as you said, since the system detects my mother-board as Intel 852 and not 855GM. As a result I had earlier tried fiddling with the 2.6.16 vanilla kernel, where I compiled i915 drivers and removed the i810 one. I do not remember the exact details of the various configurations I tried, but my X simply refused to start.
Do you have any specific suggestions, or should I just try again and get back with the exact things I did.
By the way are you using Ubuntu or Fedora?
Thanks, Debarshi