After finishing the installation and reboot, this issue could be observed 
before connecting to internet. snapd restarts again and again and consuming 
high percentage of cpu.
(Daily Build image: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 
(20180508)%)

May  9 06:40:11 u-XPS-13-9360 systemd[1]: Starting Snappy daemon...
May  9 06:40:11 u-XPS-13-9360 systemd[1]: Started Snappy daemon.
May  9 06:40:17 u-XPS-13-9360 systemd[1]: snapd.service: Service hold-off time 
over, scheduling restart.
May  9 06:40:17 u-XPS-13-9360 systemd[1]: Stopped Snappy daemon.
May  9 06:40:17 u-XPS-13-9360 systemd[1]: Starting Snappy daemon...
May  9 06:40:18 u-XPS-13-9360 systemd[1]: Started Snappy daemon.
May  9 06:40:22 u-XPS-13-9360 systemd[1]: snapd.service: Service hold-off time 
over, scheduling restart.
May  9 06:40:22 u-XPS-13-9360 systemd[1]: Stopped Snappy daemon.
May  9 06:40:22 u-XPS-13-9360 systemd[1]: Starting Snappy daemon...
May  9 06:40:22 u-XPS-13-9360 systemd[1]: Started Snappy daemon.
May  9 06:40:29 u-XPS-13-9360 systemd[1]: snapd.service: Service hold-off time 
over, scheduling restart.
May  9 06:40:29 u-XPS-13-9360 systemd[1]: Stopped Snappy daemon.
May  9 06:40:29 u-XPS-13-9360 systemd[1]: Starting Snappy daemon...
May  9 06:40:30 u-XPS-13-9360 systemd[1]: Started Snappy daemon.


$ snap version 
snap    2.32.6
snapd   2.32.6
series  16
ubuntu  18.04
kernel  4.15.0-20-generic

$ snap changes 
ID   Status  Spawn                 Ready                 Summary
1    Error   2018-05-09T10:40:16Z  2018-05-09T10:40:23Z  Initialize system state
2    Done    2018-05-09T10:40:16Z  2018-05-09T10:45:20Z  Initialize device
3    Error   2018-05-09T10:40:27Z  2018-05-09T10:40:35Z  Initialize system state
4    Error   2018-05-09T10:40:38Z  2018-05-09T10:40:45Z  Initialize system state
5    Error   2018-05-09T10:40:48Z  2018-05-09T10:40:56Z  Initialize system state
6    Error   2018-05-09T10:40:59Z  2018-05-09T10:41:07Z  Initialize system state
7    Error   2018-05-09T10:41:10Z  2018-05-09T10:41:18Z  Initialize system state
8    Error   2018-05-09T10:41:21Z  2018-05-09T10:41:30Z  Initialize system state
9    Error   2018-05-09T10:41:33Z  2018-05-09T10:41:42Z  Initialize system state
10   Error   2018-05-09T10:41:45Z  2018-05-09T10:41:54Z  Initialize system state
11   Error   2018-05-09T10:41:57Z  2018-05-09T10:42:07Z  Initialize system state
12   Error   2018-05-09T10:42:10Z  2018-05-09T10:42:19Z  Initialize system state
13   Error   2018-05-09T10:42:22Z  2018-05-09T10:42:32Z  Initialize system state
14   Error   2018-05-09T10:42:35Z  2018-05-09T10:42:45Z  Initialize system state
15   Error   2018-05-09T10:42:48Z  2018-05-09T10:42:58Z  Initialize system state
16   Error   2018-05-09T10:43:02Z  2018-05-09T10:43:13Z  Initialize system state
17   Error   2018-05-09T10:43:16Z  2018-05-09T10:43:27Z  Initialize system state
18   Error   2018-05-09T10:43:30Z  2018-05-09T10:43:42Z  Initialize system state
19   Error   2018-05-09T10:43:46Z  2018-05-09T10:43:58Z  Initialize system state
20   Error   2018-05-09T10:44:01Z  2018-05-09T10:44:13Z  Initialize system state
21   Error   2018-05-09T10:44:16Z  2018-05-09T10:44:28Z  Initialize system state
22   Error   2018-05-09T10:44:31Z  2018-05-09T10:44:50Z  Initialize system state
23   Error   2018-05-09T10:44:53Z  2018-05-09T10:46:37Z  Initialize system state

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https://bugs.launchpad.net/bugs/1767896

Title:
  Live 18.04 with persistence snapd high CPU usage

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