Public bug reported:
Ubuntu release: 26.04 LTS (Resolute)
Architecture: AMD64
Environment: Proxmox VE VM (QEMU)
ISO: resolute-desktop-amd64.iso
Installer: ubuntu-desktop-bootstrap (snap revision 665, from logs)
Steps to reproduce:
1. Complete a first Ubuntu installation successfully.
2. Boot again from the Resolute desktop ISO.
3. Select "Try Ubuntu" and open the installer from the live session.
4. Choose "Install Ubuntu alongside [existing Ubuntu system]".
5. Proceed with the installation.
Expected result:
The installer resizes the existing installation and successfully installs
Ubuntu alongside it.
Actual result:
Installation fails during partitioning with CurtinInstallError.
The original Ubuntu installation remains functional.
Key log lines:
2026-11-01 03:05:02,889 ERROR ... FAIL: configuring disk: disk-sda
2026-11-01 03:05:02,890 ERROR ... FAIL: running 'curtin block-meta simple'
2026-11-01 03:05:02,891 ERROR ... FAIL: configuring storage
2026-11-01 03:05:04,549 INFO ... saving crash report 'partitioning crashed with
CurtinInstallError' to /var/crash/1793502304.524576664.install_fail.crash
subprocess.CalledProcessError: curtin partitioning returned non-zero exit
status 3
subiquity.server.controllers.install.CurtinInstallError
** Affects: ubuntu
Importance: Undecided
Status: New
** Attachment added: "Screenshot 2026-11-01 at 04.12.31.png"
https://bugs.launchpad.net/bugs/2172726/+attachment/6014193/+files/Screenshot%202026-11-01%20at%2004.12.31.png
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https://bugs.launchpad.net/bugs/2172726
Title:
Install Ubuntu alongside existing Ubuntu fails on Resolute desktop ISO
(Proxmox VM)
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