ERROR cannot deliver device serial request: unexpected status 400

[Bruno Morelli]

I've created kernel and gadget snaps for my new board.
I successfully deployed the image created by ubuntu-image into the emmc of
my board.

I can complete the device configuration (console-conf terminates with the
message "Congratulations! This device is now registered to" ...).

Logging into my device and typing:

snap changes

I obtain the following output:
ID   Status  Spawn                 Ready                 Summary
1    Done    2017-01-30T09:02:08Z  2017-01-30T09:04:08Z  Initialize system
state
2    Doing   2017-01-30T09:02:18Z  -                     Initialize device

The system change with ID 2 ("Initialize device") seems to be in progress.
More in detail with the command:

snap change 2

I obtain:

Status  Spawn                 Ready                 Summary
Done    2017-01-30T09:02:18Z  2017-01-30T09:04:08Z  Generate device key
Doing   2017-01-30T09:02:18Z  -                     Request device serial
......................................................................
Request device serial
2017-01-30T09:24:06Z ERROR cannot deliver device serial request: unexpected
status 400
2017-01-30T09:25:09Z ERROR cannot deliver device serial request: unexpected
status 400
2017-01-30T09:26:12Z ERROR cannot deliver device serial request: unexpected
status 400
2017-01-30T09:27:15Z ERROR cannot deliver device serial request: unexpected
status 400
[...]


Am I missing something in my gadget snap implementation?
Is only an Ubuntu server side problem?

Regards,
Bruno
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