I've done a fresh install of trusty (amd64) without proposed enabled, and the issue persists. I noticed the GRUB_TIMEOUT* is been overridden on 30_os-prober. I've updated the bug description.
I've done a fresh install of trusty (amd64) without proposed enabled, and the issue persists. I noticed the GRUB_TIMEOUT* is been overridden on 30_os-prober. I've updated the bug description.