it is possible to install only using old snapd...
SNAPD_DEBUG=1 snap run hello
2025/10/10 13:19:50.010319 tool_linux.go:94: DEBUG: snap (at
"/snap/snapd/current") is older ("2.70") than distribution package
("2.71.1+ubuntu25.10.1")
2025/10/10 13:19:50.011534 logger.go:289: DEBUG: -- snap startup
{"stage":"start", "time":"1760087990.011530"}
2025/10/10 13:19:50.011791 apparmor.go:945: DEBUG: checking distro
apparmor_parser at /usr/sbin/apparmor_parser
2025/10/10 13:19:50.011816 apparmor.go:954: DEBUG: apparmor 4.0 ABI detected
but ignored
2025/10/10 13:19:50.014741 cmd_run.go:1390: DEBUG: executing snap-confine from
/usr/lib/snapd/snap-confine
2025/10/10 13:19:50.015156 cmd_run.go:512: DEBUG: SELinux not enabled
2025/10/10 13:19:50.015209 tracking.go:48: DEBUG: creating transient scope
snap.hello.hello
2025/10/10 13:19:50.015231 tracking.go:220: DEBUG: session bus is not
available: cannot find session bus
2025/10/10 13:19:50.015236 tracking.go:222: DEBUG: falling back to system bus
2025/10/10 13:19:50.015834 tracking.go:227: DEBUG: using system bus now,
session bus was not available
2025/10/10 13:19:50.016940 tracking.go:350: DEBUG: create transient scope job:
/org/freedesktop/systemd1/job/23208
2025/10/10 13:19:50.026439 tracking.go:450: DEBUG: job result is "done"
2025/10/10 13:19:50.026454 tracking.go:457: DEBUG: transient scope
snap.hello.hello-0a75bea7-6262-4883-bfe4-a3fa929349bb.scope created
2025/10/10 13:19:50.026644 tracking.go:153: DEBUG: waited 10.768757ms for
tracking
2025/10/10 13:19:50.026672 logger.go:289: DEBUG: -- snap startup {"stage":"snap
to snap-confine", "time":"1760087990.026670"}
DEBUG: -- snap startup {"stage":"snap-confine enter",
"time":"1760087990.027444"}
DEBUG: caps at startup:
cap_chown,cap_dac_override,cap_dac_read_search,cap_setgid,cap_setuid,cap_net_admin,cap_sys_chroot,cap_sys_ptrace,cap_sys_admin,cap_sys_resource,cap_perfmon,cap_bpf=ep
DEBUG: ruid: 0, euid: 0, suid: 0
DEBUG: rgid: 0, egid: 0, sgid: 0
DEBUG: apparmor label on snap-confine is: /usr/lib/snapd/snap-confine
DEBUG: apparmor mode is: enforce
DEBUG: initial caps:
cap_chown,cap_dac_override,cap_dac_read_search,cap_setgid,cap_setuid,cap_net_admin,cap_sys_chroot,cap_sys_ptrace,cap_sys_admin,cap_sys_resource,cap_perfmon,cap_bpf=ep
cannot set capabilities: Operation not permitted
This
snap (at "/snap/snapd/current") is older ("2.70") than distribution package
("2.71.1+ubuntu25.10.1")
looks strange...
And apt says that snapd needs
libfuse3-3 (>= 3.12.0)
but there is no, so I installed it using
apt --fix-broken install
Don't remember such error during upgrade from 25.04 to 25.10.
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https://bugs.launchpad.net/bugs/2127224
Title:
all snaps fail to run
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