(ZFS) After Update: Unable to mount root fs on unknown block

[Rick St. George]

FYI:

$ ubuntu-security-status

This command has been replaced with 'pro security-status'.
3121 packages installed:
     1545 packages from Ubuntu Main/Restricted repository
     1304 packages from Ubuntu Universe/Multiverse repository
     2 packages from third parties
     270 packages no longer available for download

To get more information about the packages, run
    pro security-status --help
for a list of available options.

This machine is receiving security patching for Ubuntu Main/Restricted
repository until 2025.
This machine is NOT attached to an Ubuntu Pro subscription.

Ubuntu Pro with 'esm-infra' enabled provides security updates for
Main/Restricted packages until 2030.

Ubuntu Pro with 'esm-apps' enabled provides security updates for
Universe/Multiverse packages until 2030. There are 55 pending security updates.

Try Ubuntu Pro with a free personal subscription on up to 5 machines.
Learn more at https://ubuntu.com/pro

[1fallen]

I'm not sure that's for my information, but more so yours.
Also I'm sure you noticed this:

Ubuntu Pro with 'esm-apps' enabled provides security updates for
Universe/Multiverse packages until 2030. There are 55 pending security updates.

Any who I can't help with your current problem. Maybe someone else can add some aid.

[Rick St. George]

FYI:

As the msg from above command states, "v20.04 Good till 2025".

If the fix is in Grub v2.12, then how do I install it, OR how can I update Grub instructions to Boot Up correctly???

[1fallen]

For clarity: This is not a roadblock being put on an existing support stream, it is a new support stream. Previously Ubuntu did not provide security patches for "Universe" repo packages (instead relying on upstream patches to happen when they happen). The Ubuntu security team are now producing in-house security patches for these packages, but only where Pro has been opted into (which is free for personal use).

If you do not want to opt in to Pro you still have the same level of support you had before (and the same level of support that you have with 99% of other distros).

What your failing to see is this " There are 55 pending security updates."

[Rick St. George]

Fail to see how this will fix GRUB 2.04 on my computer, but will try anyway.

Attempting ... but installng SNAP, which I previously went out of my way to REMOVE from my computer.

Will Update ....

[1fallen]

Most likely won't fix grub.

I keep getting what you want me to hear but nothing shown to help you.
Try this:

sudo grub-install /dev/sda

Then run "update-grub"

[Rick St. George]

Upon Startup this morning, same problem, but hitting Enter after "Press any key to continue" it booted up!
Afterwards, a Popup - System program problem detected, Do you want to report the problem now?" Yes

Ran Fallen's suggestion;

~$ sudo grub-install /dev/sda
Installing for i386-pc platform.
Installation finished. No error reported.

~$ sudo update-grub
Sourcing file `/etc/default/grub'
Sourcing file `/etc/default/grub.d/init-select.cfg'
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-5.15.0-94-lowlatency
Found initrd image: /boot/initrd.img-5.15.0-94-lowlatency
Found linux image: /boot/vmlinuz-5.15.0-94-lowlatency
Found initrd image: /boot/initrd.img-5.15.0-94-lowlatency
Found linux image: /boot/vmlinuz-5.15.0-88-lowlatency
Found initrd image: /boot/initrd.img-5.15.0-88-lowlatency
Found linux image: /boot/vmlinuz-5.11.0-27-lowlatency
Found initrd image: /boot/initrd.img-5.11.0-27-lowlatency
Found memtest86+ image: /boot/memtest86+.elf
Found memtest86+ image: /boot/memtest86+.bin
done

Will ReBoot and report back! .... Same problem, but again hitting Enter upon "Press any key to cont." and it boots up.
However, this is what it did before, after the last Update/Upgrade and it didn't work any more. Maybe this is the best I can hope for?
Feel there must be something I should add to Grub???

FYI - Looking at Disks shows 91GB Free on 250 GB SSD.

[Rick St. George]

I wonder if these instructions https://www.gnu.org/software/grub/ma...ent-block.html can help in setting or resetting the Environment Variables? Note the CAUTION on "skip-sig" on this page https://www.gnu.org/software/grub/ma...l#load_005fenv. Followed the links on that page but too complicated for me!

Any suggestions?
Thanks!

[1fallen]

When's the last time you ran "autoremove"?

sudo apt autoremove

and please show this:

sudo du /boot -h -s

[Rick St. George]

When's the last time you ran "autoremove"?

sudo apt autoremove

After last upgrade (last week).

[QUOTE}
and please show this:

sudo du /boot -h -s

[/QUOTE]

Result:

$ sudo du /boot -h -s
258M	/boot