Fedora 36, plocate-1.1.15-3.fc36.x86_64, systemd-250.8-1.fc36.x86_64
/usr/lib/systemd/system/plocate-updatedb.service has
ConditionACPower=true because they don't want updatedb to run
when on a laptop battery.
Now, my machine is an Intel NUC which has an Intel mobile chipset but
is very definitely not a laptop. It doesn't have a battery and always
runs off AC power.
But ...
$ sudo systemctl status plocate-updatedb.service |& cat
○ plocate-updatedb.service - Update the plocate database
Loaded: loaded (/usr/lib/systemd/system/plocate-updatedb.service; static)
Active: inactive (dead)
TriggeredBy: ● plocate-updatedb.timer
Condition: start condition failed at Fri 2022-08-05 10:29:57 BST; 5min ago
└─ ConditionACPower=true was not met
Aug 03 14:59:37 dev5 systemd[1]: plocate-updatedb.service - Update the
plocate database was skipped because of a failed condition check
(ConditionACPower=true).
Aug 04 09:29:21 dev5 systemd[1]: plocate-updatedb.service - Update the
plocate database was skipped because of a failed condition check
(ConditionACPower=true).
Aug 05 10:29:35 dev5 systemd[1]: plocate-updatedb.service - Update the
plocate database was skipped because of a failed condition check
(ConditionACPower=true).
Aug 05 10:29:57 dev5 systemd[1]: plocate-updatedb.service - Update the
plocate database was skipped because of a failed condition check
(ConditionACPower=true).
Looking at systemd sources it seems as if ConditionACPower is checked
here:
https://github.com/systemd/systemd/blob/14e7bc2e77d2699498a1f74d7e4f905f11eca335/src/shared/udev-util.c#L662
It's a bit hard to follow what the code is doing, but I think it's
looking in /sys for power_supply devices. This hardware has two, both
with type == USB. (I believe these are the two USB ports on the front
panel that can provide power to other devices, they cannot power the
machine itself.)
$ ll /sys/devices/platform/USBC000:00/power_supply
total 0
drwxr-xr-x. 5 root root 0 Aug 3 09:00 ucsi-source-psy-USBC000:001
drwxr-xr-x. 5 root root 0 Aug 3 09:00 ucsi-source-psy-USBC000:002
$ cat /sys/devices/platform/USBC000:00/power_supply/*/type
USB
USB
$ cat
/sys/devices/platform/USBC000\:00/power_supply/ucsi-source-psy-USBC000\:00*/device/typec/port*/power_role
[sink]
[sink]
[sink]
[sink]
$ cat
/sys/devices/platform/USBC000\:00/power_supply/ucsi-source-psy-USBC000\:00*/online
0
0
Anyway, I think this is a systemd bug, right?
Rich.
--
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
virt-top is 'top' for virtual machines. Tiny program with many
powerful monitoring features, net stats, disk stats, logging, etc.
http://people.redhat.com/~rjones/virt-top
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