[Remote] Session missing after Slave wake from S5 WOL

[Ray Chen]

[Summary]
[Remote] Session missing after Slave wake from S5 WOL

[Steps to reproduce]
1. Install checkbox-snappy --devmode on both master and slave
$ snap install checkbox-snappy --devmode

2. Start checkbox-sanppy master from x86 desktop (ubuntu 18.04)
$ checkbox-snappy.checkbox-cli master <ip_address>

3. Start checkbox snappy on slave and enable it as daemon and service
$ checkbox-snappy.checkbox-cli slave

4. select testplan id: snappy-cert-whitelist

5. Running S5 testing and wake the system by pressing power button
( since magic packet not work)

[Expected result]
Slave resume previous session success

[Actual result]
Session missing after Slave wake from S5 WOL, Master enter to Test plan
 selection page

[Failure rate]

[Additional information]
SKU:
system-manufacturer: Intel Corporation
system-product-name: NUC7PJYH
bios-version: JYGLKCPX.86A.0037.2018.0423.1539
CPU: Intel(R) Pentium(R) Silver J5005 CPU @ 1.50GHz (4x)
GPU: 00:02.0 VGA compatible controller [0300]: Intel Corporation Device [8086:3184] (rev 03)
kernel-version: 4.15.0-72-generic

[Ray Chen (ray.chen)]

Automatically attached

[Ray Chen (ray.chen)]

Automatically attached

[Ray Chen (ray.chen)]

Automatically attached

[Ray Chen (ray.chen)]

Automatically attached

[Ray Chen (ray.chen)]

● snap.checkbox-snappy.remote-slave.service - Service for snap application checkbox-snappy.remote-slave
   Loaded: loaded (/etc/systemd/system/snap.checkbox-snappy.remote-slave.service; enabled; vendor preset: enabled)
   Active: active (running) since Fri 2019-12-06 02:19:13 UTC; 6min ago
 Main PID: 1126 (checkbox-slave)
    Tasks: 3 (limit: 4191)
   CGroup: /system.slice/snap.checkbox-snappy.remote-slave.service
           ├─1126 /bin/sh /snap/checkbox-snappy/2012/bin/checkbox-slave
           └─1391 python3 /snap/checkbox-snappy/2012/checkbox-runtime/bin/checkbox-cli slave

Dec 06 02:19:13 localhost systemd[1]: Started Service for snap application checkbox-snappy.remote-slave.
Dec 06 02:19:18 localhost sudo[1456]: root : TTY=unknown ; PWD=/root/snap/checkbox-snappy/2012 ; USER=root ; COMMAND=/bin/true
Dec 06 02:19:18 localhost sudo[1456]: pam_unix(sudo:session): session opened for user root by (uid=0)
Dec 06 02:19:18 localhost sudo[1456]: pam_unix(sudo:session): session closed for user root
Dec 06 02:21:59 localhost checkbox-snappy.remote-slave[1126]: unable to find nested part: com.canonical.certification::led/power
Dec 06 02:21:59 localhost checkbox-snappy.remote-slave[1126]: unable to find nested part: com.canonical.certification::led/power-blink-suspend
Dec 06 02:21:59 localhost checkbox-snappy.remote-slave[1126]: unable to find nested part: com.canonical.certification::led/serial
Dec 06 02:21:59 localhost checkbox-snappy.remote-slave[1126]: unable to find nested part: com.canonical.certification::tpm-smoke-tests
Dec 06 02:22:09 localhost checkbox-snappy.remote-slave[1126]: Ignoring snappy/test-store-config-{store} with missing template parameter store

[Paul Larson (pwlars)]

Don't start the slave manually, instead use:
$ sudo snap set checkbox-snappy slave=enabled
$ sudo snap restart checkbox-snappy.remote-slave

[Betty Lin (bettyl)]

Already follow #6 to enable checkbox slave daemon service.
But this problem is still existed.

rtc/battery also has the same problem.

rtc/battery reproduce steps:
command:
 rtcwake -v -m disable
 rtcwake -v -m off -s 30

checkbox version:
checkbox-snappy 18.14 2012 stable ce-certification-qa devmode
checkbox18 1.11 624 stable ce-certification-qa -

[Sylvain Pineau (sylvain-pineau)]

pretty sure it's a duplicate of the bug affecting classic images where the snappy restart strategy is not working.