[Bug 2130843] [NEW] SSH sessions blocked on unavailable automounts by default in Ubuntu 25.10

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Since upgrading to 25.10, incoming ssh sessions hang when unavailable
systemd automounts, local or remote, are present. The creation of the
ssh session hangs from half a minute to several minutes depending on how
many automounts it tries. Stopping the unavailable automounts fixes the
problem. This did not happen prior to 25.10. Is this a bug or is there a
new and preferred way of defining automounts in fstab so that PAM or
systemd does not block incoming ssh sessions by trying to mount
unavailable automounts?

Here are 2 examples of fstab entries that are subsequently read by
systemd and turned into automounts. If the device is not available then
incoming ssh connections hang. This syntax has worked for many years.

servername.local:/volume1/name /mnt/servername/name nfs
x-systemd.automount,_netdev,x-systemd.device-
timeout=10,nfsvers=3,noauto,user,rw,exec 0 0

/dev/disk/by-label/corsair /media/myname/corsair auto
x-systemd.automount,nosuid,nodev,nofail,x-gvfs-show,x-gvfs-
name=corsair,user 0 0

** Affects: rust-coreutils (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: bot-comment dcr-incoming
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SSH sessions blocked on unavailable automounts by default in Ubuntu 25.10
https://bugs.launchpad.net/bugs/2130843
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