Debian Hardware :: ATI Proprietary Drivers Broke Touchpad And Keyboard?

I have a big problem after i installed the ATI proprietary drivers. I expected something weird to happen when using proprietary stuff, but I did not expect them to stop my touchpad from functioning

I've been running sid on that laptop for ages and followed the guide on the Debian wiki and installed: "apt-get install linux-headers-2.6-$(uname -r | sed 's,.*-,,') fglrx-control fglrx-driver". This worked like a charm and the module got compiled OK. I then rebooted the computer (couldn't restart Xorg, the screen went black for some reason, but that's not the issue here) but when the kernel started it dumped a lot of udev errors concerning libsane. It booted up OK though, but when i tried to log in i couldn't use my keyboard or my touchpad. My external keyboard and mouse worked, but i had to disconnect them and connect them again to get them working. I suspect that the laptop keyboard and touchpad are connected by usb internally, but they are tricky to disconnect and reconnect

I then did a "apt-get remove" on all those packages installed and also an "apt-get install --reinstall" on the kernel. But I still have the same problem. I suspect that dkms did something bad, but I can't figure out what to remove or reinstall to get around this problem. I also tried to remove libsane, since udev dumped a lot of error messages, but I don't understand what the connection is there (except of course that udev is used for the keyboard and touchpad)

I also don't suspect the "unstableness" of sid to be the problem here. Rather something I haven't removed or reinstalled.

Does anyone have an idea about what I can do to revert this? I really don't want to reinstall the laptop.

Edit: Just, to sum it up. The real question here is: "How do I get rid of all the mess that ATI proprietary driver caused and installed?"