Boot in runlevel 3 (console mode) : append 3 in the options line before booting. Then run the script posted here Upgrading ATI driver with atiupgrade to install the latest ATI driver. It should work in most cases. You need an Internet connection at this point.
Also read this post. It describes everything that happens during the update. You should see something similar.
Did you follow the advice in the openSUSE-11.3 release notes ? … ie BEFORE installing the ATI driver rpms did you specify ‘nomodeset’ as a boot code, and also disable loading of the DRM module in initrd completely by setting the NO_KMS_IN_INITRD sysconfig variable to yes via YAST, which then recreates initrd afterwards, followed by rebooting your machine ?
Did you also ensure that kernel-source and kernel-syms were the exact same version as your kernel BEFORE installing the rpms ?
That’s another way to do it. If that’s what you want don’t apply my method… or you will get more and more confused. There are several ways which lead to the ati driver. While using the script, you won’t have to install anything, just type** atiupgrade** and it will install the kernel sources, build the package, install the driver and compile the module, etc. While following the HOWTO … I guess you’ll just have to follow the HOWTO.
If you just reinstalled openSUSE, I suggest you first try to use the open source driver which came with the installation. You might have to boot with the option nomodeset. Then do a kernel update and reboot. After the update the commande uname -r should output 220.127.116.11-0.5-desktop or 18.104.22.168-0.5-default. Once you have the latest kernel, install the ATI driver either with the atiupgrade script or following the HOWTO.