Bug#540786: [grub-common] update-grub/grub-mkconfig doesnt work with btrfs as rootfs

Joey Hess joeyh at debian.org
Fri Jan 29 03:23:11 UTC 2010

Robert Millan wrote:
> But if you just want grub-mkconfig not to break with btrfs in /, we need more
> information on what calls are failing.  There's a gazillon invocations of
> grub-probe in there, I can't do anything without knowing which one is causing
> the script to fail.

root at gnu:/home/joey>grub-probe --target=device /boot # ext3
root at gnu:/home/joey>grub-probe --target=device / # btrfs
grub-probe: error: cannot find a device for / (is /dev mounted?).
root at gnu:/home/joey>grub-probe --device /dev/hda1 --target=fs_uuid
root at gnu:/home/joey>grub-probe --device /dev/hda2 --target=fs_uuid
grub-probe: error: unknown filesystem.

I had meant to send the attached patch to #540786 yesterday
(it's the patch that the patch I sent to #567077 depends on).
This makes it fall back to the old method of parsing
the fstab to find the info when grub-probe fails.

See also: https://bugs.launchpad.net/debian/+source/grub2/+bug/450260

see shy jo
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