Well, compiz is one of the coolest thing which linux has got. It was working flawlessly on my lenovo t60 and suddenly one fine day everything went bonkers... I started recieving these dreaded messages.
libGL error: drmMap of framebuffer failed (Invalid argument)
libGL error: reverting to (slow) indirect rendering
compiz (core) - Fatal: No GLXFBConfig for default depth, this isn't going to work.
compiz (core) - Error: Failed to manage screen: 0
compiz (core) - Fatal: No manageable screens found on display :0
when I used to run compiz --replace command. I searched the net for some time and then gave up. I thought what updates came through which screwed this up. I figured out I had only kde-core package and to upgrade to hardy I had to install kubuntu-desktop which inturn brings tons of other junk in xserver-xorg-video. So, I opened synaptic and remove all the chipset drivers. Do not remove fbdev else it will remove everything in xserver and your system will be in bonkers...
After doing that I just rebooted and yup.. my hunch was right... it was the other video drivers which were creating problem. Now, I am again running the compiz on my kde... and am loving it...
