Powerdevil isn't enabling external monitor brightness controls in the Battery applet despite ddcutil being detected during compile time. ddcutil detects my external monitor and I can change its brightness values with ddcutil manually. PowerDevil service starts without issue, though there are these odd errors in journalctl: Feb 04 17:26:58 archlinux org_kde_powerdevil[483180]: org.kde.powerdevil: org.kde.powerdevil.backlighthelper.brightness failed Feb 04 17:26:58 archlinux org_kde_powerdevil[483180]: org.kde.powerdevil: The profile "AC" tried to activate "BrightnessControl" a non-existent action. This is usually due to an installation problem, a configuration problem, or because the action is not supported
Was testing Powerdevil again, and realized my previous comment's log output may not have been sufficient: Feb 10 19:04:08 archlinux systemd[2190]: Starting Powerdevil... Feb 10 19:04:08 archlinux libddcutil[31409]: Initializing. ddcutil version 1.3.0 Feb 10 19:04:08 archlinux libddcutil[31409]: Library initialization complete. Feb 10 19:04:08 archlinux dbus-daemon[708]: [system] Activating service name='org.kde.powerdevil.discretegpuhelper' requested by ':1.259' (uid=1000 pid=31409 comm="/run/media/valmar/DataSSD/KDE/usr-20230204-1700/li") (using servicehelper) Feb 10 19:04:08 archlinux dbus-daemon[708]: [system] Successfully activated service 'org.kde.powerdevil.discretegpuhelper' Feb 10 19:04:08 archlinux dbus-daemon[708]: [system] Activating service name='org.kde.powerdevil.chargethresholdhelper' requested by ':1.259' (uid=1000 pid=31409 comm="/run/media/valmar/DataSSD/KDE/usr-20230204-1700/li") (using servicehelp> Feb 10 19:04:08 archlinux dbus-daemon[708]: [system] Successfully activated service 'org.kde.powerdevil.chargethresholdhelper' Feb 10 19:04:08 archlinux dbus-daemon[708]: [system] Activating service name='org.kde.powerdevil.backlighthelper' requested by ':1.259' (uid=1000 pid=31409 comm="/run/media/valmar/DataSSD/KDE/usr-20230204-1700/li") (using servicehelper) Feb 10 19:04:08 archlinux backlighthelper[31441]: org.kde.powerdevil: no kernel backlight interface found Feb 10 19:04:08 archlinux dbus-daemon[708]: [system] Successfully activated service 'org.kde.powerdevil.backlighthelper' Feb 10 19:04:08 archlinux org_kde_powerdevil[31409]: org.kde.powerdevil: org.kde.powerdevil.chargethresholdhelper.getthreshold failed "Charge thresholds are not supported by the kernel for this hardware" Feb 10 19:04:08 archlinux org_kde_powerdevil[31409]: org.kde.powerdevil: org.kde.powerdevil.backlighthelper.brightness failed Feb 10 19:04:08 archlinux systemd[2190]: Started Powerdevil. Feb 10 19:04:08 archlinux org_kde_powerdevil[31409]: org.kde.powerdevil: The profile "AC" tried to activate "BrightnessControl" a non-existent action. This is usually due to an installation problem, a configuration problem, or because the> Feb 10 19:04:08 archlinux org_kde_powerdevil[31409]: org.kde.powerdevil: org.kde.powerdevil.chargethresholdhelper.getthreshold failed "Charge thresholds are not supported by the kernel for this hardware"