xtree wrote:How do I get the standard experience back without re-installing?
If you can get into the desktop, which it sounds like, just de-activate the ATI driver and reboot. If this still doesn't work remove the FGLRX driver manually in synaptic and possibly also the /etc/X11/xorg.conf file if it exists.
xtree wrote:switchable graphics
If you mean onboard Intel graphics with an additional 3D controller then there is currently little support in linux for this. If not sure post the output of lspci.