Somehow purging and reinstalling the ppa did the job. Now I have installed your new built 7.9.0~git20100419+gallium+r300.7dfde3aa-0ubuntu0tormod on the freshly rebooted Ubuntu 10.04 beta 2 LiveCD.
This is the output of glxinfo > /dev/null
X Error of failed request: BadRequest (invalid request code or no such operation)
Major opcode of failed request: 136 (DRI2)
Minor opcode of failed request 12 ()
Serial number of failed request 25
Current serial number in output stream: 26
Somehow purging and reinstalling the ppa did the job. Now I have installed your new built 7.9.0~git201004 19+gallium+ r300.7dfde3aa- 0ubuntu0tormod on the freshly rebooted Ubuntu 10.04 beta 2 LiveCD.
This is the output of glxinfo > /dev/null
X Error of failed request: BadRequest (invalid request code or no such operation)
Major opcode of failed request: 136 (DRI2)
Minor opcode of failed request 12 ()
Serial number of failed request 25
Current serial number in output stream: 26