Hello, This information, might be usefull. I've encounter the same problem with a snap and found the problem. It's quite odd. It s linked to AppArmor, it secure the snaps.
In my Home directory in Linux I've replaced the default folder (images, music, videos, etc... ) with symlink with the same name pointing to other drives. Looks like that was causing security issue with AppArmor, I've removed the symlink and put back the folders, rebooted and the snap is now launching now. You can apply that solution to other snaps. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1991691 Title: cannot change mount namespace Status in Linux: Fix Released Status in linux package in Ubuntu: Fix Released Status in snapd package in Ubuntu: Invalid Bug description: Multiple snaps are either broken or "only" display permission denied messages. slack snap is not starting at all with: > update.go:85: cannot change mount namespace according to change mount (/run/user/1000/doc/by-app/snap.slack /run/user/1000/doc none bind,rw,x-snapd.ignore-missing 0 0): cannot inspect "/run/user/1000/doc": lstat /run/user/1000/doc: permission denied firefox snap does start, but also logs errors: update.go:85: cannot change mount namespace according to change mount (/var/lib/snapd/hostfs/usr/share/doc /usr/share/doc none bind,ro 0 0): cannot inspect "/var/lib/snapd/hostfs/usr/share/doc": lstat /var/lib/snapd/hostfs/usr/share/doc: permission denied update.go:85: cannot change mount namespace according to change mount (/var/lib/snapd/hostfs/usr/share/fonts /usr/share/fonts none bind,ro 0 0): cannot inspect "/var/lib/snapd/hostfs/usr/share/fonts": lstat /var/lib/snapd/hostfs/usr/share/fonts: permission denied update.go:85: cannot change mount namespace according to change mount (/var/lib/snapd/hostfs/usr/local/share/fonts /usr/local/share/fonts none bind,ro 0 0): cannot inspect "/usr/local/share/fonts": lstat /usr/local/share/fonts: permission denied update.go:85: cannot change mount namespace according to change mount (/var/lib/snapd/hostfs/usr/share/cups/doc-root /usr/share/cups/doc-root none bind,ro 0 0): cannot create directory "/usr/share/cups/doc-root": permission denied update.go:85: cannot change mount namespace according to change mount (/var/lib/snapd/hostfs/usr/share/gimp/2.0/help /usr/share/gimp/2.0/help none bind,ro 0 0): cannot create directory "/usr/share/gimp/2.0": permission denied update.go:85: cannot change mount namespace according to change mount (/var/lib/snapd/hostfs/usr/share/gtk-doc /usr/share/gtk-doc none bind,ro 0 0): cannot inspect "/var/lib/snapd/hostfs/usr/share/gtk-doc": lstat /var/lib/snapd/hostfs/usr/share/gtk-doc: permission denied update.go:85: cannot change mount namespace according to change mount (/var/lib/snapd/hostfs/usr/share/libreoffice/help /usr/share/libreoffice/help none bind,ro 0 0): cannot create directory "/usr/share/libreoffice/help": permission denied update.go:85: cannot change mount namespace according to change mount (/var/lib/snapd/hostfs/usr/share/xubuntu-docs /usr/share/xubuntu-docs none bind,ro 0 0): cannot inspect "/var/lib/snapd/hostfs/usr/share/xubuntu-docs": lstat /var/lib/snapd/hostfs/usr/share/xubuntu-docs: permission denied update.go:85: cannot change mount namespace according to change mount (/run/user/1000/doc/by-app/snap.firefox /run/user/1000/doc none bind,rw,x-snapd.ignore-missing 0 0): cannot inspect "/run/user/1000/doc": lstat /run/user/1000/doc: permission denied ProblemType: Bug DistroRelease: Ubuntu 22.10 Package: snap (not installed) ProcVersionSignature: Ubuntu 5.19.0-19.19-generic 5.19.7 Uname: Linux 5.19.0-19-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.23.0-0ubuntu2 Architecture: amd64 CasperMD5CheckResult: unknown CurrentDesktop: XFCE Date: Tue Oct 4 17:29:01 2022 InstallationDate: Installed on 2017-09-26 (1834 days ago) InstallationMedia: Ubuntu-Server 17.10 "Artful Aardvark" - Alpha amd64 (20170924) SourcePackage: snap UpgradeStatus: Upgraded to kinetic on 2022-05-22 (134 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1991691/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
