Ubuntu – Unable to upgrade from 18.04: Sorry, no more upgrades for this system

18.0420.04do-release-upgradeupgrade

I think my update-manager is confused about what Ubuntu release is installed.

After having done sudo apt update and sudo apt upgrade, I get the following (see below) when trying to upgrade from 18.04 to 20.04.

Any ideas why I get the "Sorry, no more upgrades for this system" message, when lsb_release -a reports that I have 18.04 installed – and any ideas on how to fix this?

bh@Medion:~$ sudo do-release-upgrade
Checking for a new Ubuntu release
Get:1 Upgrade tool signature [1.554 B]                                                                             
Get:2 Upgrade tool [1.336 kB]                                                                                      
Fetched 1.338 kB in 0s (0 B/s)                                                                                     
authenticate 'focal.tar.gz' against 'focal.tar.gz.gpg' 
extracting 'focal.tar.gz'

Reading cache

Checking package manager
Reading package lists... Done
Building dependency tree        
Reading state information... Done
Hit http://ppa.launchpad.net/danielrichter2007/grub-customizer/ubuntu bionic InRelease                             
Hit http://de.archive.ubuntu.com/ubuntu bionic InRelease                                                           
Hit http://de.archive.ubuntu.com/ubuntu bionic-updates InRelease                                                   
Hit http://de.archive.ubuntu.com/ubuntu bionic-backports InRelease                                                 
Get:1 http://security.ubuntu.com/ubuntu bionic-security InRelease [88,7 kB]                                        
Fetched 88,7 kB in 0s (0 B/s)                                                                                      
Reading package lists... Done    
Building dependency tree          
Reading state information... Done

Sorry, no more upgrades for this system 

There will not be any further Ubuntu releases for this system's 
'i386' architecture. 

Updates for Ubuntu 18.04 will continue until April 2023. 


Restoring original system state

Aborting
Reading package lists... Done    
Building dependency tree          
Reading state information... Done
bh@Medion:~$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 18.04.5 LTS
Release:    18.04
Codename:   bionic
bh@Medion:~$ uname -a
Linux Medion 4.15.0-122-generic #124-Ubuntu SMP Thu Oct 15 13:02:56 UTC 2020 i686 i686 i686 GNU/Linux
bh@Medion:~$

Best Answer

You seem to be running a 32-bit version of Ubuntu, as evidenced by:

There will not be any further Ubuntu releases for this system's 
'i386' architecture.

That's correct. 32-bit desktops have been dropped from future releases, including 20.04. There were simply too few 32-bit desktop contributors and testers.

Your current 32-bit Ubuntu 18.04 will be supported for the full five years (until April 2023).

Ubuntu draws it's strength from volunteer contributors and testers. It's quite possible to resume 32-bit desktop development...if enough volunteers step up to handle the (considerable) work.

If you happen to be running 32-bit Ubuntu on 64-bit hardware, you can install 64-bit Ubuntu. You cannot "upgrade" to the different architecture -- it requires a new install.

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