Bug#1113936: powerdevil: PowerDevil periodically pokes DPMS while the screen is off
Package: powerdevil
Version: 4:6.3.6-1
Severity: normal
X-Debbugs-Cc: heikki@lsd.dk
Dear Maintainer,
* What led up to the situation?
After upgrading to Debian Trixie, I noticed that the usb hub in my monitor
was switching on periodically, when the screen was off. This caused the
backlight that I have plugged in the hub to blink, approx 20 seconds off,
5 second on. I have seen similar things in Bookworm, but only a few times
an hour.
To make the debugging even more confusing, this seemed to happen randomly,
typically after I had been at the computer for a while. I finally traced
that to the fact that the issue did not happen if I was playing music on
Audacious. I did not see anything on D-Bus or other places that might
trigger the power-ups.
With the help of ChatGpt, I found a workaround:
editing ~/.config/powermanagementprofilesrc to set [AC][DimDisplay] idleTime=0
fixed the problem, the backlight is not getting on any more.
I tried to file this directly to KDE, see
https://bugs.kde.org/show_bug.cgi?id=509100
but KDE refused it, as being too old version, and because you like to get
the first reports directly. There may be useful info in that bug.
I don't think it matters, but my monitor is BenQ PD3200U
-- System Information:
Debian Release: 13.0
APT prefers stable-security
APT policy: (500, 'stable-security'), (500, 'stable')
Architecture: amd64 (x86_64)
Kernel: Linux 6.12.41+deb13-amd64 (SMP w/12 CPU threads; PREEMPT)
Locale: LANG=en_DK.UTF-8, LC_CTYPE=en_DK.UTF-8 (charmap=UTF-8), LANGUAGE=en_US:en
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled
Versions of packages powerdevil depends on:
ii libc6 2.41-12
ii libcap2-bin 1:2.75-10+b1
ii libkf6authcore6 6.13.0-1
ii libkf6configcore6 6.13.0-2
ii libkf6coreaddons6 6.13.0-1
ii libkf6crash6 6.13.0-1
ii libkf6dbusaddons6 6.13.0-1
ii libkf6globalaccel6 6.13.0-1
ii libkf6i18n6 6.13.0-1
ii libkf6idletime6 6.13.0-1
ii libkf6kcmutilscore6 6.13.0-2
ii libkf6kcmutilsquick6 6.13.0-2
ii libkf6runner6 6.13.0-1
ii libkf6screen8 4:6.3.4-1
ii libkf6screendpms8 4:6.3.4-1
ii libkf6service-bin 6.13.0-1
ii libkf6service6 6.13.0-1
ii libkf6solid6 6.13.0-1
ii libkf6xmlgui6 6.13.0-1
ii libkirigamiplatform6 6.13.0-2
ii libkscreen-bin 4:6.3.4-1
ii libkworkspace6-6 4:6.3.6-2
ii libpowerdevilcore2 4:6.3.6-1
ii libqcoro6dbus0t64 0.12.0-1
ii libqt6core6t64 [qt6-base-private-abi] 6.8.2+dfsg-9
ii libqt6dbus6 6.8.2+dfsg-9
ii libqt6gui6 6.8.2+dfsg-9
ii libqt6qml6 6.8.2+dfsg-7
ii libqt6quick6 6.8.2+dfsg-7
ii libstdc++6 14.2.0-19
ii powerdevil-data 4:6.3.6-1
Versions of packages powerdevil recommends:
ii power-profiles-daemon 0.30-1.1
ii systemsettings 4:6.3.4-2
powerdevil suggests no packages.
-- no debconf information
Reply to: