Looks like some of these were disabled with the following commit in Karmic:
commit d1ac5020204467097df572ffa74086e405447f3c Author: Michael Casadevall <email address hidden> Date: Mon Jun 29 16:32:26 2009 -0400
UBUNTU: [Config] Update powerpc and sparc for 2.6.31
Looks like some of these were disabled with the following commit in Karmic:
commit d1ac50202044670 97df572ffa74086 e405447f3c
Author: Michael Casadevall <email address hidden>
Date: Mon Jun 29 16:32:26 2009 -0400
UBUNTU: [Config] Update powerpc and sparc for 2.6.31