Dear Debian Developers,

While installing Debian 13 "Trixie" using the GNOME live ISO
(`debian-live-testing-amd64-gnome.iso`), I encountered a GRUB installation
failure during the final step of Calamares.

The error message was:

  /usr/sbin/grub-probe: error: failed to get canonical path of `/dev/sda1`.

Calamares terminated with exit code 1 from the helper script:

  /usr/share/calamares/helpers/calamares-bootloader-config

This appears to be related to bug #1104552, which describes inconsistent
Btrfs subvolume layouts between Calamares and the classic installer. In my
case, Calamares created `@` and `@home` subvolumes, while GRUB seems unable
to resolve the canonical path correctly, possibly due to the subvolume
structure.

I am attaching a screenshot of the error message for reference.

System details:
- ISO: debian-live-testing-amd64-gnome.iso (dated August 2025)
- Calamares version: 3.2.60-2
- GRUB version: grub-pc 2.12-9
- Device: /dev/sda1 (Btrfs)

Please let me know if further logs or system details are needed.

Best regards,
Andrea
Misilmeri, Sicilia

Gentili sviluppatori,

confermo che il problema si verifica sia con Calamares (live ISO) che con
il Debian Installer classico (netinst ISO).
In entrambi i casi, l’installazione di GRUB fallisce con il seguente errore:

`
grub-probe: error: failed to get canonical path of /dev/sda1
`

Ho allegato due screenshot che mostrano il fallimento in ciascun contesto.

L’ISO è stata generata con live-build su Debian 13 “Trixie”, quindi i
pacchetti provengono direttamente dai repository ufficiali.
La versione di Calamares è 3.2.60-2, GRUB è 2.12-9, e il filesystem è Btrfs
con subvolumi @ e @home.

Questo suggerisce che il bug è legato alla gestione dei subvolumi Btrfs e
alla configurazione automatica di GRUB, indipendentemente dal tipo di
installer usato.

Resto disponibile per fornire ulteriori log o testare eventuali workaround.

Cordiali saluti,
Andrea

Il lun 11 ago 2025, 00:17 Debian Bug Tracking System <owner@bugs.debian.org>
ha scritto:

We believe that the bug you reported is fixed in the latest version of
calamares, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 1110763@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Jonathan Carter <jcc@debian.org> (supplier of updated calamares package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)
Format: 1.8
Date: Mon, 21 Sep 2026 11:39:10 +0200
Source: calamares
Architecture: source
Version: 3.4.3-1
Distribution: unstable
Urgency: medium
Maintainer: Debian Qt/KDE Maintainers <debian-qt-kde@lists.debian.org>
Changed-By: Jonathan Carter <jcc@debian.org>
Closes: 1050292 1104552 1110763 1143448 1148139
Changes:
 calamares (3.4.3-1) unstable; urgency=medium
 .
   [ Nicholas D Steeves ]
   * Add 0001-use-Debian-rootfs-btrfs-subvol.patch to create the same
     layout as debian-installer. (Closes: #1104552, #1110763, #1050292)
 .
   [ Jonathan Carter ]
   * New upstream release (Closes: #1143448)
   * Update some dangling locations for Codeberg move: (Closes: #1148139)
     - Update homepage in debian/control
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Files:
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Git-Tag-Info: tag=24d7a168167e7023914c0b4f5507c73380bb35df fp=c7203c0a920670bf94f00bb1b01d1a72ac8dc9a1
Git-Tag-Tagger: Jonathan Carter <jcc@debian.org>
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