https://bugs.kde.org/show_bug.cgi?id=512820
Bug ID: 512820
Summary: Powerdevil not reporting/not letting me change DDC/CI
Brightness
Classification: I don't know
Product: kde
Version First unspecified
Reported In:
Platform: Arch Linux
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
SUMMARY
The tray icon where you'd normally change the brightness of a monitor
disappeared.
STEPS TO REPRODUCE
1. Open up the tray icon
2. The monitor brightness briefly appears, you can change it
3. The slider disappears and the systemd service throws warnings
OBSERVED RESULT
The brightness slider disappears
EXPECTED RESULT
Change the brightness.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Arch Linux
KDE Plasma Version: 6.5.3
KDE Frameworks Version: 6.20.0
Qt Version: 6.10.1
ADDITIONAL INFORMATION
[DDCutilDisplay]: ddca_set_non_table_vcp_value -3023
DDCutilDisplay]: "Odyssey G40B" retrying to set DDC/CI brightness in 2000
milliseconds - attempt no. 2
[DDCutilDisplay]: ddca_set_non_table_vcp_value -3023
[DDCutilDisplay]: "Odyssey G40B" retrying to set DDC/CI brightness in 3000
milliseconds - attempt no. 3
[DDCutilDisplay]: ddca_set_non_table_vcp_value -3023
[DDCutilDisplay]: "Odyssey G40B" failed to set DDC/CI brightness
Here's the SystemD service log
running "ddcutil detect" outputs
Display 1
I2C bus: /dev/i2c-2
DRM_connector: card0-DP-1
EDID synopsis:
Mfg id: SAM - Samsung Electric Company
Model: Odyssey G40B
Product code: ----------------
Serial number: -----------------
Binary serial number: -----------------
Manufacture year: 2024, Week: 10
VCP version: 2.0
and trying to change the brightness with "ddcutil setvcp 10 {brightness%}"
works perfectly fine
tried clearing kde config and reinstalling the whole plasma group
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