18.04 -> 22.04 upgrade

bm flag

I did an upgrade of 18.04LTS -> 22.04LTS using the software updater. After rebooting the system does not boot proper. Below the output (manual re-entered from the other machine, so maybe a type)

Call Trace:
? rest_init+0x100/+x100
Kernel Offset: 0x1da00000 from 0xffffffff81000000 (relocation range: 0xffffffff81000000-0xffffffffbfffffff)
---[ end Kernel panic - not syyncing: VFS: Unable to mount root fs on unknown-block(0.0) ]---

I've an (old) Lenovo W540, 8core, 2.7GHz, 32Gb RAM

I tried to salvage with a boot from USB (Linux 22.04 Desktop), but since I did not see the original files I decided against installing

Anyone suggestions? As long as I get my data off it's all fine by me (so using the OS from USB, but with access to the data under )



Pilot6 avatar
cn flag
There is no upgrade path from 18.04 to 22.04.
user9165100 avatar
bm flag
ouch. Remains the problem, how do I get past the problem (or, how do I get to my files)
Pilot6 avatar
cn flag
Boot from a LiveUSB and mount your disk. It is unclear why you "did not see the original files". It is unclear what you did to upgrade, etc.
user9165100 avatar
bm flag
I did the upgrade via the software updater (the one asking "there is an upgrade available"), and I went from 18.04 -> 22.10. I do not recall making the 18:04 -> 20.x in between.
user9165100 avatar
bm flag
I also did a boot from USB (22.10, Desktop version), but I did not see only the default set of files that you see when installing from scratch. If I understand you correctly you suggest to mount the “old” disk (the one on the machine, not the USB drive). Not being an OS wizard, how do I do that?
Pilot6 avatar
cn flag
Start Files and click on the disk.
karel avatar
sa flag
Does this answer your question? [How to recover deleted files?](
user9165100 avatar
bm flag
Karel, thanks for the suggestion. Unfortunately not applicable to my case, I even can't get the machine booted
gs flag

I don't know the steps the OP followed but to anyone trying to update from 18.04 to 22.04 these steps worked for me on two systems (Intel 4790 and Ryzen 2400G):

You need to do a release upgrade from 18.04 to 20.04 and then from 20.04 to 22.04

Step by step:

  1. tappend these to /etc/apt/sources.list (this is an important step that fixes the OP question, without this you cannot upgrade packages, and dist-upgrade, and without that you cannot do the releas upgrade):

deb bionic main restricted
deb bionic-updates main restricted
deb bionic-security main restricted
  1. Now on the following steps you would be needing to answer with OK and y on a few questions so make sure you look once in a while on your display, you would be needing a few restarts and it takes anywhere from half an hour to 1-2 hours, update the package list:

    sudo apt update

now upgrade packages:

sudo apt upgrade

followed by dist upgrade

sudo apt dist-upgrade

then remove all packages from your system by entering the following command (this is optional):

sudo apt autoremove

install the update-manager-core package by running the following command, in case you don't have it already:

sudo apt install update-manager-core

after that, you cand run the release upgrade utility. To do this by the following command:

sudo do-release-upgrade

after this is ready you have 20.04, once you have 20.04 (check with lsb_release -a) run one more time:

sudo do-release-upgrade

after this is ready you should have 22.04

I sit in a Tesla and translated this thread with Ai:


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