[Bug 2143299] Re: [Ubuntu26.04] Installation Failure with Daily Build 20260303

[Olivier Gayot]

The scenario is a guided reformat with LVM on disk nvme0n1.

 2026-03-05 03:07:27,991 DEBUG
subiquity.server.controllers.filesystem:1576
GuidedChoiceV2(target=GuidedStorageTargetReformat(disk_id='disk-
nvme0n1', ptable=None, allowed=[<GuidedCapability.DIRECT: 2>,
<GuidedCapability.LVM: 3>, <GuidedCapability.LVM_LUKS: 4>,
<GuidedCapability.ZFS: 5>, <GuidedCapability.ZFS_LUKS_KEYSTORE: 6>],
disallowed=[]), capability=<GuidedCapability.LVM: 3>, recovery_key=None,
sizing_policy=<SizingPolicy.SCALED: 1>, reset_partition=False,
reset_partition_size=None)

Curtin later failed with:

 Command: ['vgcreate', '--force', '--zero=y', '--yes', 'ubuntu-vg', '/dev/nvme0n1p3']
 Exit code: 5 
 Reason: -
 Stdout: ''
 Stderr:   A volume group called ubuntu-vg already exists.
         
 finish: cmd-install/stage-partitioning/builtin/cmd-block-meta: FAIL: configuring lvm_volgroup: lvm_volgroup-0

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https://bugs.launchpad.net/bugs/2143299

Title:
  [Ubuntu26.04] Installation Failure with Daily Build 20260303

Status in subiquity package in Ubuntu:
  New

Bug description:
  1. Fresh install Ubuntu server 26.04 with the daily build 20260303 on Lenovo SR850 V4
  2. The installation fails with an "An error occurred" screen.
  3. See attached full report logs for details (captured via "View full report").

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