https://bugs.kde.org/show_bug.cgi?id=507087
Bug ID: 507087
Summary: DDC/CI turns back on when monitor dims on idle
Classification: Plasma
Product: kwin
Version First 6.4.2
Reported In:
Platform: Other
OS: Linux
Status: REPORTED
Severity: minor
Priority: NOR
Component: output configuration
Assignee: kwin-bugs-n...@kde.org
Reporter: nikolay_anza...@abv.bg
CC: xaver.h...@kde.org
Target Milestone: ---
SUMMARY
(not sure if I reported this in the correct category, please re-categorize if
it's not)
I decided to turn off DDC/CI control for my screens, and ran into a bug that
turns it back on when the screen dims due to idleness, unless you reboot first.
I have 2 monitors connected via Display Port.
STEPS TO REPRODUCE
1. Turn on "Control hardware brightness with DDC/CI" from Display Configuration
2. From Power Management, turn on "Dim automatically" (set to 30 seconds for
testing)
3. Reboot (just in case)
4. Turn OFF "Control hardware brightness with DDC/CI" from Display
Configuration
5. Wait for the screen to dim.
6. Observe that "Control hardware brightness with DDC/CI" is turned back on.
WORKAROUND:
-Reboot before step 5, and it stays off now.
SOFTWARE/OS VERSIONS
Operating System: Nobara Linux 42
KDE Plasma Version: 6.4.2
KDE Frameworks Version: 6.15.0
Qt Version: 6.9.1
Kernel Version: 6.15.6-201.nobara.fc42.x86_64 (64-bit)
Graphics Platform: Wayland
Processors: 12 × AMD Ryzen 5 5500
Memory: 32 GiB of RAM
Graphics Processor: AMD Radeon RX 6600 XT
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