I was having the same trouble and found a solution at the Mandrake site.
The penguin posted, "I grabbed
http://dri.sourceforge.net/res/voodo...ibglide3-v5.so
Put it in /usr/lib and did `ldconfig`. DRI now works."
I tried it and it worked for me. The URI that I quoted is:
http://archives.mandrakelinux.com/co...0/msg02991.php
Following the thread says that he shouldn't have to do this, but It was still needed to be done in 10.1.
I downloaded the file from the sourceforge link and saved it to my home directory. I moved the file into /usr/lib as root and while still root ran ldconfig. Testing opengl files I have on the computer shows hardware acceleration now. Before the files ran very slow.