Dear Developers,
I had a challenging and frustrating experience with snapd.
Your task is to diagnose these errors and, if possible, to prevent this type of bug from recurring in future development.
The error began when I attempted to uninstall the Opera snap version. However, the uninstallation process became stuck and could not be resolved by any means. Subsequently, I uninstalled the entire snapd package and deleted all associated snap data, but even this extreme measure did not help.
I ultimately solved the problem by completely reinstalling the entire Kubuntu system.
I had a very bad day yesterday, spending the entire day only repairing my computer due to this snapd bug. This is a critical error and should be prioritized for immediate repair.
All software versions were current; the operating system was Kubuntu 25.10.
The root cause of the failure appears to be related to the mounting and initialization of fundamental Snap system components (such as loop devices, core, bare).
Any attempts to install a Snap (e.g., Opera, Firefox, LosslessCut) failed with a mounting error (cannot proceed, expected snap X to be mounted but is not).
**********************************************************
BUG REPORT: Persistent "remove-snap" Deadlock (ID 298)
Title: Snap "opera" permanently blocked in "remove-snap" state despite database repair attempts.
Snapd Version: (Fill in your version, e.g., from snap version command) Distribution: Kubuntu (or your current distribution)
Problem Description
Upon attempting to remove the opera snap package, transaction ID 298 is permanently stuck in Undo / Hold status. This error blocks all further actions (remove, install) for this snap, creating a permanent deadlock.
Command snap remove opera
error: snap "opera" has "remove-snap" change in progress
Command snap list opera - 411 latest/stable opera-softwareâś“ disabled,broken
Command snap changes
Transaction ID 298 is permanently in Undo status.
Log Error ERROR failed to remove snap "opera" base directory: remove /home/uzivatel/snap/opera: directory not empty (The initial error that triggered the failed Undo.)
*************************************************************************
sudo snap remove opera
[sudo: authenticate] Password:
error: snap "opera" has "remove-snap" change in progress
*********************************
$ uzivatel@uzivatel:~$ sudo snap abort 298
$ uzivatel@uzivatel:~$ sudo systemctl restart snapd
$ uzivatel@uzivatel:~$ sudo snap remove opera
error: snap "opera" has "remove-snap" change in progress
$ uzivatel@uzivatel:~$ snap changes
ID Status Spawn Ready Summary
280 Done today at 13:05 CET today at 13:05 CET Running service command for snap "onlyoffice-ds"
281 Done today at 13:05 CET today at 13:05 CET Running service command for snap "onlyoffice-ds"
282 Done today at 13:10 CET today at 13:11 CET Pre-download "firefox" for auto-refresh
283 Done today at 13:10 CET today at 13:15 CET Auto-refresh snap "opera"
284 Done today at 14:18 CET today at 14:18 CET Auto-refresh snap "firefox"
285 Done today at 14:19 CET today at 14:19 CET Running service command for snap "onlyoffice-ds"
286 Done today at 14:19 CET today at 14:19 CET Running service command for snap "onlyoffice-ds"
287 Done today at 14:39 CET today at 14:39 CET Connect opera:wayland to snapd:wayland
288 Done today at 15:53 CET today at 15:55 CET Install "beekeeper-studio" snap from "latest/stable" channel
289 Done today at 15:58 CET today at 15:58 CET Remove "beekeeper-studio" snap
290 Done today at 17:23 CET today at 17:23 CET Running service command for snap "onlyoffice-ds"
291 Done today at 17:23 CET today at 17:23 CET Running service command for snap "onlyoffice-ds"
292 Done today at 17:55 CET today at 17:55 CET Connect losslesscut:wayland to snapd:wayland
293 Done today at 17:55 CET today at 17:55 CET Connect opera:wayland to snapd:wayland
294 Done today at 17:55 CET today at 17:55 CET Connect opera:wayland to snapd:wayland
295 Done today at 17:55 CET today at 17:55 CET Connect losslesscut:wayland to snapd:wayland
296 Done today at 18:10 CET today at 18:10 CET Remove "losslesscut" snap
297 Done today at 18:10 CET today at 18:10 CET Install "losslesscut" snap from "latest/stable" channel
298 Undo today at 18:33 CET - Remove "opera" snap
299 Done today at 18:40 CET today at 18:40 CET Running service command for snap "onlyoffice-ds"
300 Done today at 18:40 CET today at 18:40 CET Running service command for snap "onlyoffice-ds"
$ uzivatel@uzivatel:~$ sudo snap abort 298
$ uzivatel@uzivatel:~$ sudo snap abort 283
error: cannot abort change 283 with nothing pending
$ uzivatel@uzivatel:~$ sudo snap abort 287
error: cannot abort change 287 with nothing pending
$ uzivatel@uzivatel:~$ sudo snap abort 293
error: cannot abort change 293 with nothing pending
$ uzivatel@uzivatel:~$ sudo snap abort 294
error: cannot abort change 294 with nothing pending
$ uzivatel@uzivatel:~$ sudo snap abort 298
$ uzivatel@uzivatel:~$ sudo snap abort 298
$ uzivatel@uzivatel:~$ sudo systemctl restart snapd
$ uzivatel@uzivatel:~$ killall opera
opera: no process found
$ uzivatel@uzivatel:~$ sudo snap remove opera
error: snap "opera" has "remove-snap" change in progress
$ uzivatel@uzivatel:~$
********************
$ uzivatel@uzivatel:~$ sudo snap tasks 298
Status Spawn Ready Summary
Undo today at 18:33 CET today at 18:33 CET Stop snap "opera" services
Undo today at 18:33 CET today at 18:33 CET Run remove hook of "opera" snap if present
Done today at 18:33 CET today at 18:50 CET Disconnect interfaces of snap "opera"
Undone today at 18:33 CET today at 18:35 CET Save data of snap "opera" in automatic snapshot set #13
Undone today at 18:33 CET today at 18:35 CET Remove aliases for snap "opera"
Undone today at 18:33 CET today at 18:35 CET Make snap "opera" unavailable to the system
Undone today at 18:33 CET today at 18:35 CET Remove security profile for snap "opera" (411)
Done today at 18:33 CET today at 18:50 CET Remove data for snap "opera" (406)
Done today at 18:33 CET today at 18:50 CET Remove snap "opera" (406) from the system
Error today at 18:33 CET today at 18:35 CET Remove data for snap "opera" (411)
Hold today at 18:33 CET today at 18:35 CET Remove snap "opera" (411) from the system
Undone today at 18:33 CET today at 18:35 CET Disconnect opera:gsettings from snapd:gsettings
Undone today at 18:33 CET today at 18:35 CET Disconnect opera:pulseaudio from snapd:pulseaudio
Undone today at 18:33 CET today at 18:35 CET Disconnect opera:home from snapd:home
Undone today at 18:33 CET today at 18:35 CET Disconnect opera:audio-playback from snapd:audio-playback
Undone today at 18:33 CET today at 18:35 CET Disconnect opera:browser-sandbox from snapd:browser-support
Undone today at 18:33 CET today at 18:35 CET Disconnect opera:wayland from snapd:wayland
Undone today at 18:33 CET today at 18:35 CET Disconnect opera:gnome-42-2204 from gnome-42-2204:gnome-42-2204
Undone today at 18:33 CET today at 18:35 CET Disconnect opera:network from snapd:network
Undone today at 18:33 CET today at 18:35 CET Disconnect opera:unity7 from snapd:unity7
Undone today at 18:33 CET today at 18:35 CET Disconnect opera:screen-inhibit-control from snapd:screen-inhibit-control
Undone today at 18:33 CET today at 18:35 CET Disconnect opera:opengl from snapd:opengl
Undone today at 18:33 CET today at 18:35 CET Disconnect opera:removable-media from snapd:removable-media
Undone today at 18:33 CET today at 18:35 CET Disconnect opera:sound-themes from gtk-common-themes:sound-themes
Undone today at 18:33 CET today at 18:35 CET Disconnect opera:upower-observe from snapd:upower-observe
Undone today at 18:33 CET today at 18:35 CET Disconnect opera:chromium-ffmpeg-121586 from chromium-ffmpeg:chromium-ffmpeg-121586
Undone today at 18:33 CET today at 18:35 CET Disconnect opera:gtk-3-themes from gtk-common-themes:gtk-3-themes
Undone today at 18:33 CET today at 18:35 CET Disconnect opera:desktop-legacy from snapd:desktop-legacy
Undone today at 18:33 CET today at 18:35 CET Disconnect opera:u2f-devices from snapd:u2f-devices
Undone today at 18:33 CET today at 18:35 CET Disconnect opera:camera from snapd:camera
Undone today at 18:33 CET today at 18:35 CET Disconnect opera:desktop from snapd:desktop
Undone today at 18:33 CET today at 18:35 CET Disconnect opera:x11 from snapd:x11
Undone today at 18:33 CET today at 18:35 CET Disconnect opera:icon-themes from gtk-common-themes:icon-themes
......................................................................
Make snap "opera" unavailable to the system
2025-11-26T18:35:26+01:00 INFO cannot link snap "opera" back, some of its data has already been removed
......................................................................
Remove data for snap "opera" (411)
2025-11-26T18:35:26+01:00 ERROR failed to remove snap "opera" base directory: remove /home/uzivatel/snap/opera: directory not empty
$ uzivatel@uzivatel:~$ sudo systemctl stop snapd
Stopping 'snapd.service', but its triggering units are still active:
snapd.socket
$ uzivatel@uzivatel:~$ sudo umount -l /var/snap/opera/common/ns
umount: /var/snap/opera/common/ns: no mount point specified.
$ uzivatel@uzivatel:~$ sudo umount -l /snap/opera/*
$ uzivatel@uzivatel:~$ sudo systemctl start snapd
$ uzivatel@uzivatel:~$ sudo snap remove opera
error: snap "opera" has "remove-snap" change in progress
****************************
$ uzivatel@uzivatel:~$ sudo snap remove opera
[sudo: authenticate] Password:
error: snap "opera" has "remove-snap" change in progress
$ uzivatel@uzivatel:~$ sudo systemctl stop snapd.socket snapd.service
$ uzivatel@uzivatel:~$ sudo umount -l /snap/opera/* 2>/dev/null
$ uzivatel@uzivatel:~$ sudo umount -l /var/snap/opera/common/ns 2>/dev/null
$ uzivatel@uzivatel:~$ sudo rm -rf /home/uzivatel/snap/opera
$ uzivatel@uzivatel:~$ sudo rm -rf /var/snap/opera
$ uzivatel@uzivatel:~$ sudo rm -rf /var/lib/snapd/snaps/opera_*.snap
$ uzivatel@uzivatel:~$ sudo systemctl start snapd.socket snapd.service
$ uzivatel@uzivatel:~$ sudo snap abort 298
$ uzivatel@uzivatel:~$ snap list
Name Version Rev Tracking Publisher Notes
bare 1.0 5 latest/stable canonicalâś“ base
chromium 142.0.7444.175 3313 latest/stable canonicalâś“ -
chromium-ffmpeg 120726-120170-119605-119293-etc 88 latest/stable canonicalâś“ -
core18 20251029 2976 latest/stable canonicalâś“ base
core20 20250822 2682 latest/stable canonicalâś“ base
core22 20251009 2163 latest/stable canonicalâś“ base
core24 20251001 1225 latest/stable canonicalâś“ base
cups 2.4.12-2 1130 latest/stable openprintingâś“ -
firefox 145.0.2-1 7423 latest/stable/… mozilla✓ -
gnome-3-28-1804 3.28.0-19-g98f9e67.98f9e67 198 latest/stable canonicalâś“ -
gnome-3-38-2004 0+git.efb213a 143 latest/stable canonicalâś“ -
gnome-42-2204 0+git.837775c-sdk0+git.7b07595 226 latest/stable/… canonical✓ -
gnome-46-2404 0+git.df85349-sdk0+git.54e4d8f 145 latest/stable canonicalâś“ -
gnome-calculator 48.1 972 latest/stable canonicalâś“ -
gtk-common-themes 0.1-81-g442e511 1535 latest/stable/… canonical✓ -
gtk-theme-breeze 1.3 5 latest/stable/… kde✓ -
icon-theme-breeze 1.3 5 latest/stable/… kde✓ -
losslesscut 3.67.1 139 latest/stable mifino -
mesa-2404 25.0.7-snap211 1165 latest/stable canonicalâś“ -
ocrmypdf v16.4.2+git1.39010dd2 171 latest/stable shael7aerien -
ocrthypdf v0.7.0-65-g92959b4 169 latest/stable digidigital-software -
onlyoffice-ds 9.0.4 741 latest/stable onlyofficeâś“ -
opera - 411 latest/stable opera-softwareâś“ disabled,broken
snapd 2.72 25577 latest/stable canonicalâś“ snapd
thunderbird 140.5.0esr-2 877 latest/stable canonicalâś“ -
whisper-gael v20250625 8 latest/stable gael-legoff -
wine-platform-6-stable 6.0.4 19 latest/stable mmtrt -
wine-platform-runtime v1.0 397 latest/stable mmtrt -
$ uzivatel@uzivatel:~$ ^C
$ uzivatel@uzivatel:~$ sudo snap tasks 411
error: cannot find change with id "411"
$ uzivatel@uzivatel:~$ sudo snap remove opera
error: snap "opera" has "remove-snap" change in progress
*************************
$ uzivatel@uzivatel:~$ sudo systemctl stop snapd.socket snapd.service
$ uzivatel@uzivatel:~$ sudo snapctl forget 298
error: cannot communicate with server: Post "http://localhost/v2/snapctl": dial unix /run/snapd-snap.socket: connect: connection refused
$ uzivatel@uzivatel:~$ sudo systemctl stop snapd.socket snapd.service
$ uzivatel@uzivatel:~$ sudo rm -f /var/lib/snapd/seq
$ uzivatel@uzivatel:~$ sudo rm -f /var/lib/snapd/lock/*
$ uzivatel@uzivatel:~$ sudo systemctl start snapd.socket snapd.service
$ uzivatel@uzivatel:~$ sudo snap abort 298
$ uzivatel@uzivatel:~$ snap changes
sudo snap remove opera
ID Status Spawn Ready Summary
280 Done today at 13:05 CET today at 13:05 CET Running service command for snap "onlyoffice-ds"
281 Done today at 13:05 CET today at 13:05 CET Running service command for snap "onlyoffice-ds"
282 Done today at 13:10 CET today at 13:11 CET Pre-download "firefox" for auto-refresh
283 Done today at 13:10 CET today at 13:15 CET Auto-refresh snap "opera"
284 Done today at 14:18 CET today at 14:18 CET Auto-refresh snap "firefox"
285 Done today at 14:19 CET today at 14:19 CET Running service command for snap "onlyoffice-ds"
286 Done today at 14:19 CET today at 14:19 CET Running service command for snap "onlyoffice-ds"
287 Done today at 14:39 CET today at 14:39 CET Connect opera:wayland to snapd:wayland
288 Done today at 15:53 CET today at 15:55 CET Install "beekeeper-studio" snap from "latest/stable" channel
289 Done today at 15:58 CET today at 15:58 CET Remove "beekeeper-studio" snap
290 Done today at 17:23 CET today at 17:23 CET Running service command for snap "onlyoffice-ds"
291 Done today at 17:23 CET today at 17:23 CET Running service command for snap "onlyoffice-ds"
292 Done today at 17:55 CET today at 17:55 CET Connect losslesscut:wayland to snapd:wayland
293 Done today at 17:55 CET today at 17:55 CET Connect opera:wayland to snapd:wayland
294 Done today at 17:55 CET today at 17:55 CET Connect opera:wayland to snapd:wayland
295 Done today at 17:55 CET today at 17:55 CET Connect losslesscut:wayland to snapd:wayland
296 Done today at 18:10 CET today at 18:10 CET Remove "losslesscut" snap
297 Done today at 18:10 CET today at 18:10 CET Install "losslesscut" snap from "latest/stable" channel
298 Undo today at 18:33 CET - Remove "opera" snap
299 Done today at 18:40 CET today at 18:40 CET Running service command for snap "onlyoffice-ds"
300 Done today at 18:40 CET today at 18:40 CET Running service command for snap "onlyoffice-ds"
301 Done today at 19:03 CET today at 19:03 CET Running service command for snap "onlyoffice-ds"
302 Done today at 19:03 CET today at 19:04 CET Running service command for snap "onlyoffice-ds"
error: snap "opera" has "remove-snap" change in progress
$ uzivatel@uzivatel:~$
****************************************************
****************************************************
sudo snap install opera
[sudo: authenticate] Password:
2025-11-26T20:53:23+01:00 INFO Waiting for automatic snapd restart...
error: cannot perform the following tasks:
- Mount snap "core22" (2163) (cannot proceed, expected snap "core22" revision 2163 to be mounted but is not)
*************************
$ uzivatel@uzivatel:~$ sudo snap install opera
error: cannot perform the following tasks:
- Download snap "opera" (411) from channel "stable" (the download has been cancelled: context canceled)
- Mount snap "bare" (5) (cannot proceed, expected snap "bare" revision 5 to be mounted but is not)
********************
$ uzivatel@uzivatel:~$ sudo systemctl status snapd
â—Ź snapd.service - Snap Daemon
Loaded: loaded (/usr/lib/systemd/system/snapd.service; enabled; preset: enabled)
Active: active (running) since Wed 2025-11-26 20:57:28 CET; 3min 58s ago
Invocation: d33c7e4434a042b08592b1bcf8215094
TriggeredBy: â—Ź snapd.socket
Main PID: 6864 (snapd)
Tasks: 15 (limit: 18872)
Memory: 101.3M (peak: 108.6M)
CPU: 9.676s
CGroup: /system.slice/snapd.service
└─6864 /usr/lib/snapd/snapd
nov 26 20:57:27 uzivatel snapd[6864]: backends.go:70: AppArmor status: apparmor is enabled and all features are available
nov 26 20:57:27 uzivatel snapd[6864]: backend.go:145: reloading profiles for snap-confine
nov 26 20:57:28 uzivatel systemd[1]: Started snapd.service - Snap Daemon.
nov 26 20:57:37 uzivatel snapd[6864]: api_snaps.go:536: Installing snap "opera" revision unset
nov 26 20:57:44 uzivatel snapd[6864]: handlers.go:1312: expected snap "bare" revision 5 to be mounted but is not
nov 26 20:57:54 uzivatel snapd[6864]: taskrunner.go:304: Change 5 task (Mount snap "bare" (5)) failed: cannot proceed, expected snap "bare" revision 5 to be mounted but is not
nov 26 20:57:54 uzivatel snapd[6864]: taskrunner.go:304: Change 5 task (Download snap "opera" (411) from channel "stable") failed: the download has been cancelled: context canceled
nov 26 20:59:15 uzivatel snapd[6864]: api_snaps.go:536: Installing snap "losslesscut" revision unset
nov 26 20:59:57 uzivatel snapd[6864]: handlers.go:1312: expected snap "core20" revision 2682 to be mounted but is not
nov 26 21:00:07 uzivatel snapd[6864]: taskrunner.go:304: Change 6 task (Mount snap "core20" (2682)) failed: cannot proceed, expected snap "core20" revision 2682 to be mounted but is not
$ uzivatel@uzivatel:~$ losetup -a
/dev/loop0: []: (/var/lib/snapd/snaps/snapd_25577.snap)
$ uzivatel@uzivatel:~$ sudo systemctl stop snapd
Stopping 'snapd.service', but its triggering units are still active:
snapd.socket
$ uzivatel@uzivatel:~$ sudo systemctl start snapd
$ uzivatel@uzivatel:~$ sudo snap install opera
error: cannot perform the following tasks:
- Mount snap "opera" (411) (cannot proceed, expected snap "opera" revision 411 to be mounted but is not)
- Mount snap "gtk-common-themes" (1535) (cannot proceed, expected snap "gtk-common-themes" revision 1535 to be mounted but is not)
- Mount snap "chromium-ffmpeg" (88) (cannot proceed, expected snap "chromium-ffmpeg" revision 88 to be mounted but is not)
- Mount snap "gnome-42-2204" (226) (cannot proceed, expected snap "gnome-42-2204" revision 226 to be mounted but is not)
$ uzivatel@uzivatel:~$
******************************
Spätná väzba. Super. Tvoje rady mi pomohli. Opera je úspešne nainštalovaná
$ uzivatel@uzivatel:~$ sudo snap install opera
error: cannot perform the following tasks:
- Mount snap "opera" (411) (cannot proceed, expected snap "opera" revision 411 to be mounted but is not)
- Mount snap "gtk-common-themes" (1535) (cannot proceed, expected snap "gtk-common-themes" revision 1535 to be mounted but is not)
- Mount snap "chromium-ffmpeg" (88) (cannot proceed, expected snap "chromium-ffmpeg" revision 88 to be mounted but is not)
- Mount snap "gnome-42-2204" (226) (cannot proceed, expected snap "gnome-42-2204" revision 226 to be mounted but is not)
$ uzivatel@uzivatel:~$ sudo systemctl stop snapd.service snapd.socket
$ uzivatel@uzivatel:~$ ps aux | grep snapd
uzivatel 15619 0.0 0.0 12020 2544 pts/1 S+ 21:12 0:00 grep snapd
$ uzivatel@uzivatel:~$ sudo systemctl start snapd.socket snapd.service
$ uzivatel@uzivatel:~$ cd /var/lib/snapd/snaps
$ uzivatel@uzivatel î‚° /var/lib/snapd/snaps î‚° ls -l | grep snap
-rw------- 2 root root 4096 Nov 26 21:02 bare_5.snap
-rw------- 2 root root 77545472 Nov 26 21:02 core22_2163.snap
-rw------- 2 root root 53399552 Nov 26 20:53 snapd_25577.snap
$ uzivatel@uzivatel î‚° /var/lib/snapd/snaps î‚° sudo mount -o loop /var/lib/snapd/snaps/bare_5.snap /mnt
mount: /mnt: WARNING: source write-protected, mounted read-only.
$ uzivatel@uzivatel:~$ sudo mount -o loop /var/lib/snapd/snaps/bare_5.snap /mnt
[sudo: authenticate] Password:
mount: /mnt: /var/lib/snapd/snaps/bare_5.snap is already mounted.
$ uzivatel@uzivatel:~$ sudo snap install opera
opera 124.0.5705.42 from Opera (opera-softwareâś“) installed
$ uzivatel@uzivatel:~$
*************************************
$ uzivatel@uzivatel:~$ sudo snap install losslesscut
[sudo: authenticate] Password:
error: cannot perform the following tasks:
- Mount snap "losslesscut" (139) (cannot proceed, expected snap "losslesscut" revision 139 to be mounted but is not)
- Mount snap "gnome-3-28-1804" (198) (cannot proceed, expected snap "gnome-3-28-1804" revision 198 to be mounted but is not)
$ uzivatel@uzivatel:~$ ls -l | grep snap
drwx------ 3 uzivatel uzivatel 3488 Nov 26 21:18 snap
**********************************
$ î‚° uzivatel@uzivatel:~$ sudo snap install firefox
[sudo: authenticate] Password:
error: cannot perform the following tasks:
- Mount snap "snapd" (25577) (cannot proceed, expected snap "snapd" revision 25577 to be mounted but is not)
$ î‚° uzivatel@uzivatel:~$ sudo snap install firefox
2025-11-26T22:10:21+01:00 INFO Waiting for automatic snapd restart...
error: cannot perform the following tasks:
- Mount snap "core22" (2163) (cannot proceed, expected snap "core22" revision 2163 to be mounted but is not)
$ î‚° uzivatel@uzivatel:~$ sudo systemctl stop snapd.service snapd.socket
$ î‚° uzivatel@uzivatel:~$ sudo systemctl start snapd.socket snapd.service
$ î‚° uzivatel@uzivatel:~$ ls -l /var/lib/snapd/snaps | grep
Použitie: grep [VOĽBA]... VZORY [SÚBOR]...
ÄŽalšie informácie zĂskate prĂkazom „grep --help“.
$ î‚° uzivatel@uzivatel:~$ ls -l /var/lib/snapd/snaps | grep firefox
$ î‚° uzivatel@uzivatel:~$ FILE_NAME=$(ls /var/lib/snapd/snaps | grep 'firefox' | head -n 1)
$ î‚° uzivatel@uzivatel:~$ sudo mount -o loop "/var/lib/snapd/snaps/$FILE_NAME" /mnt
mount: /mnt: failed to setup loop device for /var/lib/snapd/snaps.
$ î‚° uzivatel@uzivatel:~$
************************
$ uzivatel@uzivatel:~$ dmesg | grep loop
dmesg: read kernel buffer failed: Operácia nie je povolená
$ uzivatel@uzivatel:~$ sudo dmesg | grep loop
[ 0.109945] Calibrating delay loop (skipped), value calculated using timer frequency.. 5786.89 BogoMIPS (lpj=2893448)
[ 0.291104] loop: module loaded
[ 6.908593] loop0: detected capacity change from 0 to 8
[ 87.013249] loop0: detected capacity change from 0 to 8
**********************
$ uzivatel@uzivatel:~$ sudo dmesg | grep loop
[ 0.109945] Calibrating delay loop (skipped), value calculated using timer frequency.. 5786.89 BogoMIPS (lpj=2893448)
[ 0.291104] loop: module loaded
[ 6.908593] loop0: detected capacity change from 0 to 8
[ 87.013249] loop0: detected capacity change from 0 to 8
$ uzivatel@uzivatel:~$ ls -l /var/lib/snapd/snaps/ | grep -E "snapd|core22|firefox"
$ uzivatel@uzivatel:~$ sudo mkdir -p /mnt/snap-snapd /mnt/snap-core22
$ uzivatel@uzivatel:~$ sudo mount -o loop /var/lib/snapd/snaps/snapd_25577.snap /mnt/snap-snapd
mount: /mnt/snap-snapd: failed to setup loop device for /var/lib/snapd/snaps/snapd_25577.snap.
$ uzivatel@uzivatel:~$ sudo mount -o loop /var/lib/snapd/snaps/snapd_25577.snap /mnt/snap-snapd
mount: /mnt/snap-snapd: failed to setup loop device for /var/lib/snapd/snaps/snapd_25577.snap.
$ uzivatel@uzivatel:~$ sudo snap install firefox
2025-11-26T22:33:43+01:00 INFO Waiting for automatic snapd restart...
error: cannot perform the following tasks:
- Download snap "firefox" (7423) from channel "stable" (the download has been cancelled: context canceled)
- Setup snap "snapd" (25577) security profiles (cannot get current snapd snap info: cannot find current revision for snap snapd: readlink /snap/snapd/current: no such file or directory)
- Mount snap "bare" (5) (cannot proceed, expected snap "bare" revision 5 to be mounted but is not)
$ uzivatel@uzivatel:~$
