ATI Radeon KMS vs. UMS With Ubuntu 10.04

ATI Radeon KMS vs. UMS With Ubuntu 10.04: Earlier this week we published comparative benchmarks of Mandriva, PCLinuxOS, Ubuntu, and openSUSE. In the discussion that followed, a number of people requested a set of tests that compare the performance of the ATI Radeon Linux graphics driver stack with kernel mode-setting (KMS) vs. user-space mode-setting (UMS), so today we have such results to deliver.