Yesterday i installed the amd driver on my lubuntu 12.10 following this guide http://m.itworld.com/software/306225/install-amd-catalyst-1210-driver-ubuntu-1210?mm_ref=http%3A%2F%2Fwww.google.com%2Fsearch%3Fhl%3Den%26q%3DInstall%2Bamd%2Bdrivers%2Bin%2Bubuntu , after rebooting my pc, the screen resolution went low! And minecraft crashes each time i open it! Please help! I cannot change my screen resolution too as only one option is availalable!
try with this guide
And check the section - Using Ubuntu-supplied fglrx/Catalyst - Work fine with my HD7850 and kernel 3.7.0-7 .
Note: I had two minimal issues but the solution is here: