My best guess here is that mkinitramfs is not creating a valid initramfs on powerpc from an xfs filesystem. The message about not being able to mount the rootfs should not ever be seen so long as the initrd is valid.
The other possibility (which would explain the powerpc dependence of this bug) is that yaboot is not copying the initrd over to the apple boot partition correctly for some reason, caused by xfs. Either way, this cannot be a kernel bug, mainly because if the initrd were places correctly, we would get to the initramfs and see a different message. The part of the boot failure here from the kernel is completely unrelated to xfs, since it has not even gotten to the initrd, much less to module loading where the xfs module would be loaded. ** Changed in: linux-source-2.6.15 (Ubuntu) Sourcepackagename: linux-source-2.6.15 => initramfs-tools -- Powerbook G4 kernel panic https://launchpad.net/bugs/55454 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs