For me... solved it by noticing that after I use sudo umount /boot the command ls /boot still showed directory content. Therefore, every adjustment to the file /etc/default/grub would be written to the directory on /dev/sda1 that is mounted over my boot directory on /dev/sda3. However, during boot, mounts won't take place after a selection is made in the grub menu (either manual or by timeout)
So, I remounted my partition: sudo mount /boot and noted the partition I made long time ago as a boot partion by issuing the command: mount|grep boot I then unmounted the boot partition, moved the directory out of the way, and made a new mount point, and mounted again by: sudo umount /boot && sudo mv /boot /boot.backup && sudo mkdir /boot && sudo mount /boot After that, I installed the correct info to the mbr (master boot record): sudo grub-install --recheck /dev/sda Edited the configuration file /etc/default/grub and ran update-grub. Hope this helps people who stumble upon this bug looking for a solution. Bear in mind you only try these commands when you know what each command does, and understand the underlying logic. I leave it to you to determine if you use MBR or uefi, or want a unbootable system. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/797544 Title: grub2 waits forever for keystroke before booting default OS. headless server. hang. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/797544/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
