https://bugs.kde.org/show_bug.cgi?id=516407
Bug ID: 516407
Summary: DDC library bug prevents Powerdevil from applying
power management actions upon waking laptop from sleep
Classification: Plasma
Product: plasmashell
Version First master
Reported In:
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Power management & brightness
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: 1.0
Created attachment 189878
--> https://bugs.kde.org/attachment.cgi?id=189878&action=edit
Systemd logs of powerdevil when the laptop is plugged, then unplugged while
awake
SUMMARY
Despite the issue being resolved in PowerDevil, there is seemingly a bug in the
DDC library preventing the power management settings from being applied when
the laptop wakes up from sleep.
STEPS TO REPRODUCE
1. In power management, configure the screen brightness to go down when on
battery. Make sure the current brightness is 100% and that the laptop is
charging.
2. Close the lid, putting the laptop in sleep mode.
3. Unplug the laptop.
4. Open the laptop and log in.
OBSERVED RESULT
The brightness has not changed to the desired amount.
EXPECTED RESULT
The brightness should change.
SOFTWARE/OS VERSIONS
Operating System: Arch Linux
KDE Plasma Version: 6.6.0
KDE Frameworks Version: 6.23.0
Qt Version: 6.10.2
Kernel Version: 6.18.9-arch1-2 (64-bit)
Graphics Platform: Wayland
Processors: 32 × 13th Gen Intel® Core™ i9-13900HX
Memory: 32 GiB of RAM (31.1 GiB usable)
Graphics Processor 1: Intel® Graphics
Graphics Processor 2: NVIDIA GeForce RTX 4090 Laptop GPU
ADDITIONAL INFORMATION
Laptop is a Lenovo Legion Pro 7 16IRX8H with Nvidia + Intel GPU
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