ramtina@ramtina-desktop:~$ lspci|grep VGA
01:00.0 VGA compatible controller: ATI Technologies Inc Radeon RV100 QY [Radeon 7000/VE]
ramtina@ramtina-desktop:~$ compiz --replace & disown
[1] 8221
ramtina@ramtina-desktop:~$ compiz (core) - Fatal: Software rendering detected.
compiz (core) - Error: Failed to manage screen: 0
compiz (core) - Fatal: No manageable screens found on display :0.0

Launching fallback window manager
Window manager warning: Buggy client sent a _NET_ACTIVE_WINDOW message with a timestamp of 0 for 0x520091c (ramtina@ra)
Window manager warning: meta_window_activate called by a pager with a 0 timestamp; the pager needs to be fixed.