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Update Manager - system crash

Posted: Fri Feb 09, 2018 10:32 am
by Jim-PG
Hi,

I have a i5 HP Specter 360 2-2 1/2 years old. I installed Linux Mint [no Windows] on it from the start, sorted out the problems and have only had minor issues since. My present Linux Mint version is 18.2 or 18.3 [I forget which: my system has crashed].

Frequently but not regularly, I update the software using Update Manager, which is what I did today. During the installation process I left the room and returned to find the following non-GUI message:
-------------

GNU GRUB version 2.02~beta2-36ubuntu3.16

Minimal BASH-like editing is supported. For the first word, TAB lists possible
command completions. Anywhere else TAB lists possible device or file completions.

grub>_

---------------

I don't know whether there are commands that I could use. I did use <exit> and a second page came up with the following message and an on-screen keyboard:

--------------

Boot Device Not Found

Please install an operating system on your hard disk.

Hard Disk - (3F0)

F2 System Diagnostics

For more information, please visit www.hp.com/go/techcenter/startup

------------

That URL provided instructions about restoring the BIOS etc but that would delete my data [if it is still there but this is obviously a Boot issue]. It would also undo whatever I did to sideline Microsoft on booting. Fortunately I have continuous cloud backup for most of my files.

Using the F2 key I conducted a quick check on the HDD which according to the result "PASSED"

If there is a command I can use, I'd appreciate some assistance - I'm merely an end-user so don't have any strategies myself...

Cheers,
Jim

Re: Update Manager - system crash - grub wiped out?

Posted: Fri Feb 09, 2018 12:57 pm
by oxygendebt
I think I am having a very similar and probably related problem:

I'm running Linux Mint 18.2 or 18.3 (also not sure which because I can't check) on a 2015 Toshiba Satellite P70-B. I usually install software updates pretty regularly when I get notifications from update manager (just the basic stuff, nothing crazy or unstable beta versions).

Today there were about 10-15 basic updates that were recommended for installation, so I clicked ok. I left the computer for a few minutes and when I came back it had rebooted itself to Windows (which I never use, but I keep a small Windows partition that can sometimes help in rare instances like this... e.g. at least I can access this forum and ask for help!).

Now I can't boot into Linux at all. I do a complete shutdown and restart, but I don't get a grub menu or anything - it just goes straight into Windows like Linux isn't even there. With the Windows partition editor I can see that my Linux partitions are still there but I don't know how to get back in!

Anyone know what happened and how to fix it?

Cheers,
Robert

Re: Update Manager - system crash

Posted: Fri Feb 09, 2018 6:13 pm
by Jim-PG
I think the problem is more than with grub.
I've used a live USB with Linux Mint 18 without finding a way through this problem.

Gparted reveals:
my mint 18 partition /dev/sdb1 is "unknown"; with the following message:

Unable to detect file system. Possible reasons are:
- the file system is damaged
- the file system is unknown to GParted
- there is no file system available (unformatted)
- the device entry dev/sdb1 is missing


The command in terminal sudo mount /dev/sdb1 returned
mount: /dev/sdb1 is write-protected, mounting read only
mount: /dev/sdb1 is already mounted or /mnt busy


the fat2 /dev/sva1 EFI system partition is not mounted

crypt-LUKS not mounted & "Linux unified Key Setup encryption is not yet supported

My problem also occurred on 9 February as has oxygendebt's

Jim

Re: Update Manager - system crash

Posted: Sun Feb 11, 2018 4:17 pm
by oxygendebt
Using a live USB with Mint 18.3, I am able to mount my filesystem partition (sda6) without any problem. Try doing it as root:

sudo -i
mkdir /root/sda6
mount /dev/sda6 /root/sda6

As root I can also mount my EFI boot partition (sda2) in a similar way, like
mkdir /root/sda2
mount /dev/sda2 /root/sda2

There I can see that the files in root/sda2/EFI/ubuntu were indeed modified at the time of the update on Feb 9th, but there are no backup or old versions to revert to.

If you can mount your filesystem, then the following tutorial for reinstalling grub might be a solution:

https://www.community.linuxmint.com/tutorial/view/2283

He's got a disclaimer about not being sure whether it works for dual-boot, so I'm a little worried about messing up my Windows partition if I follow it. It would be great to know if any of this works for you or if you've found another solution.