Public bug reported: About twice a month or so, my laptop exhibits the following symptoms:
1. Adjusting the brightness with the usual keys no longer works. 2. Closing the lid no longer suspends 3. Plugging in or unplugging no longer updates the battery charging icon. When this happens, I run this command: systemctl suspend and after opening the lid and unlocking, everything works again. Based on these symptoms and workaround, I believe this is a bug in powerdevil. I first recorded it occurring in version 5.12.7-0ubuntu0.1 in 2019, but it persists in version 5.12.8. Note that this is not a duplicate of bug #1766683: https://bugs.launchpad.net/ubuntu/+source/powerdevil/+bug/1766683 Most of the time, closing the lid does suspend my laptop, and I have lidAction=1 already set (see attached powermanagementprofilesrc). I would greatly appreciate suggestions for debugging. Currently I have tried looking at the output of: systemctl status upower.service systemctl status org.kde.powerdevil.backlighthelper.service acpi -V systemd-inhibit --list journalctl --boot --lines=all | grep powerdevil grep powerdevil ~/.xsession-errors as well as running strace and gdb on the powerdevil process when it is unresponsive, but I haven't turned up anything useful. (I've attached it anyway in case anyone can make use of it.) $ lsb_release -rd Description: Ubuntu 18.04.5 LTS Release: 18.04 $ apt-cache policy powerdevil powerdevil: Installed: 4:5.12.8-0ubuntu0.1 Candidate: 4:5.12.8-0ubuntu0.1 Version table: *** 4:5.12.8-0ubuntu0.1 500 500 http://us.archive.ubuntu.com/ubuntu bionic-updates/universe amd64 Packages 100 /var/lib/dpkg/status 4:5.12.4-0ubuntu1 500 500 http://us.archive.ubuntu.com/ubuntu bionic/universe amd64 Packages ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: powerdevil 4:5.12.8-0ubuntu0.1 ProcVersionSignature: Ubuntu 5.4.0-72.80~18.04.1-generic 5.4.101 Uname: Linux 5.4.0-72-generic x86_64 ApportVersion: 2.20.9-0ubuntu7.23 Architecture: amd64 CurrentDesktop: KDE Date: Wed May 19 20:21:10 2021 InstallationDate: Installed on 2020-02-01 (473 days ago) InstallationMedia: Ubuntu 18.04.2 LTS "Bionic Beaver" - Release amd64 (20190210) SourcePackage: powerdevil UpgradeStatus: No upgrade log present (probably fresh install) ** Affects: powerdevil (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug bionic ** Attachment added: "powermanagementprofilesrc" https://bugs.launchpad.net/bugs/1928997/+attachment/5498831/+files/powermanagementprofilesrc -- You received this bug notification because you are a member of Kubuntu Bugs, which is subscribed to powerdevil in Ubuntu. https://bugs.launchpad.net/bugs/1928997 Title: powerdevil occasionally stops responding until manually suspended To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/powerdevil/+bug/1928997/+subscriptions -- kubuntu-bugs mailing list kubuntu-b...@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs