On a fresh install today from the precise desktop cd I tried to turn on
KMS with radeon.modeset=1.  This brought me to a running in low graphics
mode message.

It is because of a race issue described in the KMS wiki
https://wiki.ubuntu.com/X/KernelModeSetting .  I have the
"RADEONDRIGetVersion failed" message in the Xorg.0.log.  It used to be
the case that you would end up at a terminal becuase of this.

This is why I am requesting KMS on by default for radeon cards.  On
kernels where KMS is on (lucid, debian sid) you don't have this problem.

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https://bugs.launchpad.net/bugs/949288

Title:
  Build in ATI/radeon framebuffers on PowerPC

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