I just installed the latest ATI graphic drivers version 11.11, by first removing the old ATI drivers from jocky. The installation went smooth and afterwords i ran the commando sudo aticonfig --initial -f and restarted the computer.
I also installed Gnome-shell. Before when I was using Gnome-shell with the default Ubuntu ATI-properiataty drivers installed by Jockey, all the text in Gnome shell was messed up.
Now the text looks normal but every time I try to open the "start-menu/dashboard" the screen flickrs/flashes/blinks a few times.
Is there a way to resolve this issue?
Also, how can I confirm that it is the latest ATI drivers that are activated?
I had this problem and I solve it after install the last ATI graphic drivers version 11.12 you can find it in
http://support.amd.com/us/Pages/AMDSupportHub.aspx
select the one you want "my system is Ubuntu 11.10 32 bit and my graphic card is AMD Radeon HD 6400M Series" this is the link if you want it
http://support.amd.com/us/gpudownload/linux/Pages/radeon_linux.aspx
after install it go to "Catalyst control center":->Display Options->tear free.
enable it after that apply and ok it should solve your problem.