Recently I have been trying to enable 3d acceloration on my mobility u1 (aka IGP 320m) chip in my ze4420us laptop. I am running Mandrake 9.2 with the original 2.4.22 kernel (I suppose that's what it is.) and XFree86 4.3
I do have a specific problem at the moment, but if anyone knows an easier way to help me out then that is always appreciated. At the moment Harddrake finds my video chip as the mobility u1, and I assume it is running it off of the radeon driver. My current attemt to solve this problem is found on the xfree86 ~alanh site, my problem begins here, I downloaded both radeon_drv.o and the linux Drm kernel source for 4.3
I replaced (and backed up) the old drv.o with the new one. And opened a shell window, which turned out this way.
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[bardiel@x1-6-00-0b-cd-e8-25-08 bardiel]$ cd /home/bardiel/Desktop/drm
[bardiel@x1-6-00-0b-cd-e8-25-08 drm]$ make -f Makefile.linux
Error: Could not locate kernel tree in /lib/modules/2.4.22-10mdk/build/include /usr/src/linux-2.4.22-10mdk/include /usr/src/linux/include /usr/include
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This is were my minimal knowledge of linux hits me. Any help would be appreciated, but I don't know many commands, so a minimal guide would help alot. Thanks for everything.

you need to install the kernel sources. go to rpmfind.net and look for
kernel-source. You'll get a list. Get the kernel-source-2.4.22-10mdk.i586.rpm. Go into the directory where you downloaded it to and install the rpm with

rpm -ivh kernel-source-2.4.22-10mdk.i586.rpm

Try to compile the drm thing again. Hopefully it works.