I installed Mesa 9.0 20120903 from https://launchpad.net/ubuntu/quantal/+source/mesa/9.0~git20120903.e1673d20.is.git20120821.c1114c61-0ubuntu1 and I experience the same slowness and artifacts on that.
So I won't try the other git snapshots since the bug was clearly introduced before 03.09.2012.
I installed Mesa 9.0 20120903 from https:/ /launchpad. net/ubuntu/ quantal/ +source/ mesa/9. 0~git20120903. e1673d20. is.git20120821. c1114c61- 0ubuntu1 and I experience the same slowness and artifacts on that.
So I won't try the other git snapshots since the bug was clearly introduced before 03.09.2012.