Snaps don't open on Debian 11

JD-9 · October 26, 2021, 3:58pm

Hi, snaps don’t open after upgrading from Debian 10 to 11. Commands like, sudo snap refresh && snap list are working fine on my computer. But running, snap run <appname> throws me an error: WARNING: cgroup v2 is not fully supported yet, proceeding with partial confinement cannot change profile for the next exec call: No such file or directory snap-update-ns failed with code 1.

snap --version

snap    2.52.1
snapd   2.52.1
series  16
debian  11
kernel  5.10.0-9-amd64

I’m hopeless at this time. I tried clearing font cache, reinstalled snapd, removed and installed again. I even reinstalled all the snaps. What could be wrong with my system? Or am I doing something wrong?

ogra · October 26, 2021, 5:09pm

are snapd.apparmor.service and apparmor.service running ?

ijohnson · October 26, 2021, 5:37pm

You might also try refreshing to the beta channel of snapd which will have the necessary fix to support cgroupsv2. Try snap install snapd --beta or if that says snapd is already installed snap refresh snapd --beta.

Lee · October 28, 2021, 12:51am

See my posts on another thread:
This might be of help

Some snaps will only launch the first time

JD-9 · October 31, 2021, 1:01pm

How do I see the status of those services you mentioned?

JD-9 · October 31, 2021, 1:03pm

I’ll try updating to beta when I’m on my Debian computer. Thanks! Hope this’ll fix the issues.

JD-9 · October 31, 2021, 1:04pm

Will do if updating to snap beta wouldn’t work

ogra · November 1, 2021, 8:46am

you check them with:

systemctl status apparmor.service

and

systemctl status snapd.apparmor.service

JD-9 · November 1, 2021, 2:36pm

Well, thanks for the response. Here are the results. AppArmor inactive.

myself@debian:~$ systemctl status apparmor.service

    apparmor.service - Load AppArmor profiles
         Loaded: loaded (/lib/systemd/system/apparmor.service; disabled; vendor preset: enabled)
         Active: inactive (dead)
           Docs: man:apparmor(7)
                 https://gitlab.com/apparmor/apparmor/wikis/home/

and

myself@debian:~$ systemctl status snapd.apparmor.service
Unit snapd.apparmor.service could not be found.

JD-9 · November 1, 2021, 2:39pm

Tried to reinstall apparmor and got the following:

myself@debian:~$ sudo apt install --reinstall apparmor
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following packages were automatically installed and are no longer required:
  apper apper-data cdparanoia cdrdao cups-pk-helper dvd+rw-tools espeak-ng-data fonts-symbola gir1.2-atspi-2.0 gir1.2-secret-1 growisofs
  hyphen-en-us k3b k3b-data k3b-i18n kdeaccessibility kmag kmousetool kmouth kontrast libatk-adaptor libbrlapi0.8 libdotconf0 libespeak-ng1
  libiso9660-11 libk3b7 libk3b7-extracodecs libkf5cddb5 libmusicbrainz5cc2v5 libneon27-gnutls libpcaudio0 libperl4-corelibs-perl
  libqaccessibilityclient-qt5-0 libsonic0 libvcdinfo0 mythes-en-us orca perl-tk print-manager python3-brlapi python3-cups
  python3-cupshelpers python3-louis python3-pyatspi python3-smbc python3-speechd sound-icons speech-dispatcher
  speech-dispatcher-audio-plugins speech-dispatcher-espeak-ng system-config-printer-common system-config-printer-udev task-desktop vcdimager
  x11-apps x11-session-utils xbrlapi xinit xkbset xorg
Use 'sudo apt autoremove' to remove them.
0 upgraded, 0 newly installed, 1 reinstalled, 0 to remove and 98 not upgraded.
Need to get 640 kB of archives.
After this operation, 0 B of additional disk space will be used.
Get:1 http://deb.debian.org/debian bullseye/main amd64 apparmor amd64 2.13.6-10 [640 kB]
Fetched 640 kB in 1s (786 kB/s)  
Preconfiguring packages ...
(Reading database ... 279852 files and directories currently installed.)
Preparing to unpack .../apparmor_2.13.6-10_amd64.deb ...
Unpacking apparmor (2.13.6-10) over (2.13.6-10) ...
Setting up apparmor (2.13.6-10) ...
Reloading AppArmor profiles 
Warning from /var/lib/snapd/apparmor/profiles (/var/lib/snapd/apparmor/profiles/snap.lxd.migrate line 571): Unconfined exec qualifier (ux) allows some dangerous environment variables to be passed to the unconfined process; 'man 5 apparmor.d' for details.
Warning from /var/lib/snapd/apparmor/profiles (/var/lib/snapd/apparmor/profiles/snap.lxd.buginfo line 571): Unconfined exec qualifier (ux) allows some dangerous environment variables to be passed to the unconfined process; 'man 5 apparmor.d' for details.
Warning from /var/lib/snapd/apparmor/profiles (/var/lib/snapd/apparmor/profiles/snap.lxd.activate line 571): Unconfined exec qualifier (ux) allows some dangerous environment variables to be passed to the unconfined process; 'man 5 apparmor.d' for details.
Warning from /var/lib/snapd/apparmor/profiles (/var/lib/snapd/apparmor/profiles/snap.lxd.lxd line 571): Unconfined exec qualifier (ux) allows some dangerous environment variables to be passed to the unconfined process; 'man 5 apparmor.d' for details.
Warning from /var/lib/snapd/apparmor/profiles (/var/lib/snapd/apparmor/profiles/snap.lxd.lxc-to-lxd line 571): Unconfined exec qualifier (ux) allows some dangerous environment variables to be passed to the unconfined process; 'man 5 apparmor.d' for details.
Warning from /var/lib/snapd/apparmor/profiles (/var/lib/snapd/apparmor/profiles/snap.lxd.daemon line 620): Unconfined exec qualifier (ux) allows some dangerous environment variables to be passed to the unconfined process; 'man 5 apparmor.d' for details.
Warning from /var/lib/snapd/apparmor/profiles (/var/lib/snapd/apparmor/profiles/snap.lxd.lxc line 571): Unconfined exec qualifier (ux) allows some dangerous environment variables to be passed to the unconfined process; 'man 5 apparmor.d' for details.
Warning from /var/lib/snapd/apparmor/profiles (/var/lib/snapd/apparmor/profiles/snap.lxd.check-kernel line 571): Unconfined exec qualifier (ux) allows some dangerous environment variables to be passed to the unconfined process; 'man 5 apparmor.d' for details.
Warning from /var/lib/snapd/apparmor/profiles (/var/lib/snapd/apparmor/profiles/snap.lxd.benchmark line 571): Unconfined exec qualifier (ux) allows some dangerous environment variables to be passed to the unconfined process; 'man 5 apparmor.d' for details.
Warning from /var/lib/snapd/apparmor/profiles (/var/lib/snapd/apparmor/profiles/snap.lxd.hook.remove line 571): Unconfined exec qualifier (ux) allows some dangerous environment variables to be passed to the unconfined process; 'man 5 apparmor.d' for details.
Processing triggers for man-db (2.9.4-2) ...