Public bug reported:
on wsl2 I tried to upgrade to 26.04
I followed instructions:
sudo apt update
sudo apt upgrade -y
sudo apt dist-upgrade -y
sudo apt autoremove -y
sudo apt install update-manager-core
Prompt=lts
sudo do-release-upgrade -d
Checking package manager
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Calculating the changes
Calculating the changes
Could not calculate the upgrade
An unresolvable problem occurred while calculating the upgrade.
----- ERROR occurred here ---
If none of this applies, then please report this bug using the
command 'ubuntu-bug ubuntu-release-upgrader-core' in a terminal. If
you want to investigate this yourself the log files in
'/var/log/dist-upgrade' will contain details about the upgrade.
Specifically, look at 'main.log' and 'apt.log'.
Restoring original system state
Aborting
ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: ubuntu-release-upgrader-core 1:24.04.28
Uname: Linux 6.6.87.2-microsoft-standard-WSL2 aarch64
ApportVersion: 2.28.1-0ubuntu3.8
Architecture: arm64
CasperMD5CheckResult: unknown
CrashDB: ubuntu
Date: Mon May 4 09:19:48 2026
PackageArchitecture: all
ProcEnviron:
LANG=C.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to noble on 2026-05-04 (0 days ago)
** Affects: ubuntu-release-upgrader (Ubuntu)
Importance: Undecided
Status: New
** Tags: apport-bug arm64 dist-upgrade noble wayland-session
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https://bugs.launchpad.net/bugs/2150852
Title:
An unresolvable problem occurred while calculating the upgrade on WSL2
24.04 to 26.04
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