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View Full Version : Installed 16.04 in separate partition, now 14.04 not booting



jamarsh123
May 10th, 2016, 05:50 PM
Longtime user of Ubuntu 14.04, but I wanted to try Ubuntu 16.04, so I installed it into a separate partition. I also reinstalled the boot partition, expecting grub2 to find both versions as boot options. I tried 'update-grub'. All the OS versions are detected, but when I restart the computer, grub does not present Ubuntu 14.04 as an option.

oldfred
May 10th, 2016, 06:04 PM
If update-grub shows it, then it should be in menu.
Or are you updating the old install and grub in MBR is now from new install.
You have to run update-grub in all installs on a new kernel.
And only one install can control MBR (if BIOS).

You can manually reconfigure to boot a grub entry that is based on partition, not on specific kernel. Then you do not have to run update-grub all the time.

To see what grub and versions are where:
Post the link to the Create BootInfo summary report. Is part of Boot-Repair:
https://help.ubuntu.com/community/Boot-Info

(https://help.ubuntu.com/community/Boot-Info)
How to: Create a Customized GRUB2 Screen that is Maintenance Free.- Cavsfan
https://help.ubuntu.com/community/MaintenanceFreeCustomGrub2Screen
https://help.ubuntu.com/community/Grub2/CustomMenus
http://ubuntuforums.org/showthread.php?t=2076205


(https://help.ubuntu.com/community/Boot-Info)

jamarsh123
May 10th, 2016, 06:59 PM
update-grub does show it, but it is not in the menu.
16.04 is a fresh install, including grub, in separate partition, which has replaced the previous grub.
I ran update-grub on the new installation only.
Working on the boot-info report now.

And here is the link to the boot-info report
http://paste2.org/XdvKxjJ0

jamarsh123
May 10th, 2016, 09:29 PM
Here is the link to the boot-info report
http://paste2.org/XdvKxjJ0

jamarsh123
May 10th, 2016, 09:45 PM
Sorry for the inconvenience, but I think I need to close this thread. I've managed to boot into my original version, 14.04. Thanks for the response.

oldfred
May 10th, 2016, 10:05 PM
I see you have separate /boot partition.
Generally with most desktops, it is better not to have /boot as a separate partition. Some LVM or server type installs may need a separate /boot.

And never share a /boot with different installs. It will lead to conflicts.