i have installed ati catalyst control center. which i think would be driver for ati?? still compiz check shows following result...
Gathering information about your system...
Distribution: Linux Mint
Desktop environment: GNOME
Graphics chip: ATI Technologies Inc M92 [Mobility Radeon HD 4500 Series]
Driver in use: vesa
Rendering method: AIGLX
Checking if it's possible to run Compiz on your system... [SKIP]
Checking for hardware/setup problems... [SKIP]
At least one check had to be skipped:
Error: vesa driver in use
Would you like to know more? (Y/n) y
The vesa driver is not capable of running Compiz, you need to install
the proper driver for your graphics card.