The problem here is lack of entropy in the kernel. A CVE was reported in
the kernel related to low entropy, and the modification prevented the
data from going out. Unfortunately that means any programs at early boot
that attempted to obtain a few bytes of random data would get stuck,
potentially for several minutes. That's of course unreasonable, so the
patch in the kernel has since been reverted.
In the snapd end we've also modified the particular logic that used the
random data to use a different strategy, since the entropy was not
important for the particular use we had for the data at play.
So this should be fixed on both ends by now: the kernel was reverted,
and snapd won't get blocked if that happens elsewhere. So an update
should guarantee that you won't observe this anymore.
** Changed in: snapd (Ubuntu)
Status: Confirmed => Fix Released
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https://bugs.launchpad.net/bugs/1779948
Title:
Snapd gets stuck when starting Ubuntu.
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