If you are unable to boot as a result of similar symptoms as was seen in this bug (which should be fixed by now, presumably, comment/report new if not) there is a possible workaround to enable booting after the grub config file has been written whilst grub-probe is unable to detect the btrfs:
1. At the boot menu [e]dit the entry and look at the kernel line: linux /vmlinuz-2.6.38-8-generic root=/dev/mapper/mellu-uburooot ro rootflags=subvol=@ quiet splash vt.handoff=7 3. IF the "rootflags=subvol=@" boot option is missing add it, and then boot the command list using ctrl+x 4. Once booted make sure that grub-probe detects the btrfs OK and then run update-grub. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/732149 Title: [natty] btrfs "grub-probe: error: unknown filesystem" -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
