Well, all I can say is that I have had no reason to install extlinux, but that doesn't really matter.
Funnily enough, update-grub does no longer seem to have a hard time running os-prober, now that I have commented out GRUB_DISABLE_OS_PROBER=true again: real 0m17.431s user 0m2.080s sys 0m2.580s Not that I have applied any updates since - mysterious... grub.cfg and syslog attached for reference, you can clearly see the duplicate entries for the raw md0 disks sda1 and sdb1... ** Attachment added: "grub.cfg and syslog excerpt while running update-grub (twice)" https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1181720/+attachment/3683132/+files/grub.tgz -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1181720 Title: grub with partition detection issues (horribly slow) since recent update in 13.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1181720/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs