New in snapd 2.62:

• Aspects based configuration schema support (experimental)
• Refresh app awareness support for UI (experimental)
• Support for user daemons by introducing new control switches --user/--system/--users for service start/stop/restart (experimental)
• Add AppArmor prompting experimental flag (feature currently unsupported)
• Installation of local snap components of type test
• Packaging of components with snap pack
• Expose experimental features supported/enabled in snapd REST API endpoint /v2/system-info
• Support creating and removing recovery systems for use by factory reset
• Enable API route for creating and removing recovery systems using /v2/systems with action create and /v2/systems/{label} with action remove
• Lift requirements for fde-setup hook for single boot install
• Enable single reboot gadget update for UC20+
• Allow core to be removed on classic systems
• Support for remodeling on hybrid systems
• Install desktop files on Ubuntu Core and update after snapd upgrade
• Upgrade sandbox features to account for cgroup v2 device filtering
• Support snaps to manage their own cgroups
• Add support for AppArmor 4.0 unconfined profile mode
• Add AppArmor based read access to /etc/default/keyboard
• Upgrade to squashfuse 0.5.0
• Support useradd utility to enable removing Perl dependency for UC24+
• Support for recovery-chooser to use console-conf snap
• Add support for --uid/--gid using strace-static
• Add support for notices (from pebble) and expose via the snapd REST API endpoints /v2/notices and /v2/notice
• Add polkit authentication for snapd REST API endpoints /v2/snaps/{snap}/conf and /v2/apps
• Add refresh-inhibit field to snapd REST API endpoint /v2/snaps
• Add refresh-inhibited select query to REST API endpoint /v2/snaps
• Take into account validation sets during remodeling
• Improve offline remodeling to use installed revisions of snaps to fulfill the remodel revision requirement
• Add rpi configuration option sdtv_mode
• When snapd snap is not installed, pin policy ABI to 4.0 or 3.0 if present on host
• Fix gadget zero-sized disk mapping caused by not ignoring zero sized storage traits
• Fix gadget install case where size of existing partition was not correctly taken into account
• Fix trying to unmount early kernel mount if it does not exist
• Fix restarting mount units on snapd start
• Fix call to udev in preseed mode
• Fix to ensure always setting up the device cgroup for base bare and core24+
• Fix not copying data from newly set homedirs on revision change
• Fix leaving behind empty snap home directories after snap is removed (resulting in broken symlink)
• Fix to avoid using libzstd from host by adding to snapd snap
• Fix autorefresh to correctly handle forever refresh hold
• Fix username regex allowed for system-user assertion to not allow '+'
• Fix incorrect application icon for notification after autorefresh completion
• Fix to restart mount units when changed
• Fix to support AppArmor running under incus
• Fix case of snap-update-ns dropping synthetic mounts due to failure to match desired mount dependencies
• Fix parsing of base snap version to enable pre-seeding of Ubuntu Core Desktop
• Fix packaging and tests for various distributions
• Add remoteproc interface to allow developers to interact with Remote Processor Framework which enables snaps to load firmware to ARM Cortex microcontrollers
• Add kernel-control interface to enable controlling the kernel firmware search path
• Add nfs-mount interface to allow mounting of NFS shares
• Add ros-opt-data interface to allow snaps to access the host /opt/ros/ paths
• Add snap-refresh-observe interface that provides refresh-app-awareness clients access to relevant snapd API endpoints
• steam-support interface: generalize Pressure Vessel root paths and allow access to driver information, features and container versions
• steam-support interface: make implicit on Ubuntu Core Desktop
• desktop interface: improved support for Ubuntu Core Desktop and limit autoconnection to implicit slots
• cups-control interface: make autoconnect depend on presence of cupsd on host to ensure it works on classic systems
• opengl interface: allow read access to /usr/share/nvidia
• personal-files interface: extend to support automatic creation of missing parent directories in write paths
• network-control interface: allow creating /run/resolveconf
• network-setup-control and network-setup-observe interfaces: allow busctl bind as required for systemd 254+
• libvirt interface: allow r/w access to /run/libvirt/libvirt-sock-ro and read access to /var/lib/libvirt/dnsmasq/**
• fwupd interface: allow access to IMPI devices (including locking of device nodes), sysfs attributes needed by amdgpu and the COD capsule update directory
• uio interface: allow configuring UIO drivers from userspace libraries
• serial-port interface: add support for NXP Layerscape SoC
• lxd-support interface: add attribute enable-unconfined-mode to require LXD to opt-in to run unconfined
• block-devices interface: add support for ZFS volumes
• system-packages-doc interface: add support for reading jquery and sphinx documentation
• system-packages-doc interface: workaround to prevent autoconnect failure for snaps using base bare
• microceph-support interface: allow more types of block devices to be added as an OSD
• mount-observe interface: allow read access to /proc/{pid}/task/{tid}/mounts and proc/{pid}/task/{tid}/mountinfo
• polkit interface: changed to not be implicit on core because installing policy files is not possible
• upower-observe interface: allow stats refresh
• gpg-public-keys interface: allow creating lock file for certain gpg operations
• shutdown interface: allow access to SetRebootParameter method
• media-control interface: allow device file locking
• u2f-devices interface: support for Trustkey G310H, JaCarta U2F, Kensington VeriMark Guard, RSA DS100, Google Titan v2