I came across two bugs in gnu/services/pm.scm in tlp-configuration. 1. disks-devices should be disk-devices, because the name after serialization, DISKS_DEVICES, is not recognized. https://linrunner.de/tlp/settings/disks.html#disk-devices
2. ahci-runtime-pm-on-ac? and ahci-runtime-pm-on-bat? shouldn't be of the type maybe-on-off-boolean. These get serialized to "on" or "off", but the accepted values are "on" and "auto". https://linrunner.de/tlp/settings/disks.html#ahci-runtime-pm-on-ac-bat
