| Summary: | "Control hardware brightness with DDC/CI" option is present in the KCM even when DDC/CI is off in the OSD menu of the monitor | ||
|---|---|---|---|
| Product: | [Applications] systemsettings | Reporter: | Patrick Silva <bugseforuns> |
| Component: | kcm_kscreen | Assignee: | kscreen-bugs-null <kscreen-bugs-null> |
| Status: | CONFIRMED --- | ||
| Severity: | normal | CC: | olib141, plasma-bugs-null |
| Priority: | NOR | ||
| Version First Reported In: | 6.5.91 | ||
| Target Milestone: | --- | ||
| Platform: | Arch Linux | ||
| OS: | Linux | ||
| Latest Commit: | Version Fixed/Implemented In: | ||
| Sentry Crash Report: | |||
| Attachments: | screenshot | ||
Does `ddcutil detect` fail to find the monitor with DDC/CI turned off monitor-side? $ ddcutil detect
Invalid display
I2C bus: /dev/i2c-4
DRM_connector: card0-HDMI-A-1
EDID synopsis:
Mfg id: CMT - UNK
Model: GA25FC
Product code: 9650 (0x25b2)
Serial number: xxxxxxxxxxxx
Binary serial number: 0 (0x00000000)
Manufacture year: 2025, Week: 29
This monitor does not support DDC/CI. (I2C slave address x37 is unresponsive.)
I suppose it also shouldn't appear with HDR where brightness is managed by software. I will mark this as CONFIRMED. |
Created attachment 189651 [details] screenshot SUMMARY There is an option to turn DDC/CI on/off in the OSD menu of my monitor. The "Control hardware brightness with DDC/CI" option is unexpectedly present in the KCM (and checked) even when DDC/CI is set to off in the OSD menu of my monitor. And the slider used to set the brightness is missing. STEPS TO REPRODUCE 1. turn DDC/CI fesature off in the OSD menu of the monitor 2. open Display Configuration KCM 3. OBSERVED RESULT "Control hardware brightness with DDC/CI" option is unexpectedly present in the KCM (and checked). Please see the attached screenshot. EXPECTED RESULT hide "Control hardware brightness with DDC/CI" option when DDC/CI feature is off in the OSD menu of the monitor SOFTWARE/OS VERSIONS Operating System: Arch Linux KDE Plasma Version: 6.5.91 KDE Frameworks Version: 6.23.0 Qt Version: 6.11.0 Graphics Platform: Wayland