Comment 15 for bug 1773033

Verified 1.1ubuntu1.18.04.7~16.04.2 on Xenial:

root@x-uu-verify:~# on_ac_power ; echo $?
1
root@x-uu-verify:~# unattended-upgrade --dry-run --verbose
Initial blacklisted packages: ebtables
Initial whitelisted packages:
Starting unattended upgrades script
Allowed origins are: o=Ubuntu,a=xenial, o=Ubuntu,a=xenial-security, o=UbuntuESM,a=xenial
System is on battery power, stopping
root@x-uu-verify:~# on_ac_power ; echo $?
0
root@x-uu-verify:~# unattended-upgrade --dry-run --verbose
Initial blacklisted packages: ebtables
Initial whitelisted packages:
Starting unattended upgrades script
Allowed origins are: o=Ubuntu,a=xenial, o=Ubuntu,a=xenial-security, o=UbuntuESM,a=xenial
No packages found that can be upgraded unattended and no pending auto-removals
root@x-uu-verify:~# echo ' Unattended-Upgrade::OnlyOnACPower "false";' | tee /etc/apt/apt.conf.d/51unattended-upgrades-on-battery
 Unattended-Upgrade::OnlyOnACPower "false";
root@x-uu-verify:~# on_ac_power ; echo $?
1
root@x-uu-verify:~# unattended-upgrade --dry-run --verbose
Initial blacklisted packages: ebtables
Initial whitelisted packages:
Starting unattended upgrades script
Allowed origins are: o=Ubuntu,a=xenial, o=Ubuntu,a=xenial-security, o=UbuntuESM,a=xenial
No packages found that can be upgraded unattended and no pending auto-removals
root@x-uu-verify:~# dpkg -l unattended-upgrades | cat
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description
+++-===================-==========================-============-===========================================
ii unattended-upgrades 1.1ubuntu1.18.04.7~16.04.2 all automatic installation of security upgrades