My problem was that this was happening with all kernels that I tried (386, 686, etc), and fixing it required hackish modification of the _PPC frequency limiting code, to stop it from incorrectly limiting. It appears that this bug is now gone as of 2.6.17-2 in Edgy, but I can't say for sure. The description in the patch for 2.6.17 is useful, reading it carefully makes it seem to me like the bug didn't manifest itself in Ubuntu because of a change in the kernel, but instead because of a change in something like init script timing, and also that the problem can appear somewhat randomly.
As far as I know, the bug is not fixed for Dapper however, and my attempt to backport the 2.6.17-rc2 patch didn't seem to work. I might try it again in a few days. -- kernel can't scale cpu frequency https://launchpad.net/bugs/36014 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
