Btrfs boot partition does not have an UUID

[KDEUSER56]

Do the following to reproduce the problem: Using the installer create a /boot partition (primary) using btrfs as file system. When the install is finished and you boot up the system, the fstab entry for /boot looks like this:

/dev/sdb1 /boot btrfs defaults 0 2

This does not happen if I repeat the exact same procedure using ext2/ext3/ext4 for the /boot partition, where an entry in the resulting fstab looks like expected:

UUID=13b5e56a-825c-4633-bd65-64174ecc3c7b /boot ext4 defaults 0 2

I tried to manually solve this issue by running

"sudo blkid /dev/sdb1", but nothing is returned and "sudo blkid" does not list /dev/sdb1 anywhere.

This issue is annoying and often leads to the /boot partition not being mounted on the target system. For example suppose you install your system on a external harddrive using qemu. Then the external drive will be something like /dev/sda in qemu, but when you boot on real hardware it will be something like /dev/sdb and wont mount /boot.

This issue is reproducible for Ubuntu 14.04 and 14.10, I have not tried earlier versions.

I always took an empty external disk to reproduce this issue. Originally the issue became apparent, when my preseeded install conducted in qemu did not mount mount /boot on the real hardware, because /dev/sda1 needed to be exchanged with /dev/sdb1. This issue is not due to preseeding, I could reproduce it manually by creating a btrfs /boot and a btrfs / partition on an empty usb. The root partition had an UUID as expected, /boot did not.

[Dimitri John Ledkov (xnox)]

Please use $ ubuntu-bug ubiquity, to open the bug report. Such that all installation logs and debug information is collected and attached to the bug report.