I'm having a similar issue on Ubuntu 20.04 on a Lenovo P340, which is a desktop workstation system and thus doesn't even have any capability for battery operation without an external UPS. I'm attaching a copy of selected directories in /sys and /proc that the script inspects.
** Attachment added: "Tar of selected directories in /sys and /proc" https://bugs.launchpad.net/ubuntu/+source/powermgmt-base/+bug/1823521/+attachment/5515514/+files/on_ac_power_bug.tgz -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to powermgmt-base in Ubuntu. https://bugs.launchpad.net/bugs/1823521 Title: on_ac_power returns 1 if battery is not present Status in Xfce4 Power Manager: New Status in powermgmt-base package in Ubuntu: Confirmed Bug description: on_ac_power should return 0 (as exit code). Besides Xfce Power Manager tells in Devices tab that Line power is "Not plugged in". Tested by an old Macbook. (I don't have battery to test with.) ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: powermgmt-base 1.33 ProcVersionSignature: Ubuntu 4.18.0-17.18~18.04.1-generic 4.18.20 Uname: Linux 4.18.0-17-generic x86_64 NonfreeKernelModules: wl nvidia ApportVersion: 2.20.9-0ubuntu7.6 Architecture: amd64 CurrentDesktop: XFCE Date: Sun Apr 7 14:02:36 2019 Dependencies: EcryptfsInUse: Yes InstallationDate: Installed on 2017-01-05 (821 days ago) InstallationMedia: Xubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719) PackageArchitecture: all SourcePackage: powermgmt-base UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/xfce4-power-manager/+bug/1823521/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
