if memory serves me right it's feature 10 (Brightness). Will querry the capabilities of my LG UHD monitor later to check it.AFAIK there is no generic command for brightness control over DDC.DDC can be used for HDMI,can't it?
EDIT:
Code:
pi@Pi5-SN530-256:~ $ ddcutil capabilitiesModel: Not specifiedMCCS version: 2.1VCP Features: Feature: 02 (New control value) Feature: 04 (Restore factory defaults) Feature: 05 (Restore factory brightness/contrast defaults) Feature: 08 (Restore color defaults) Feature: 10 (Brightness) Feature: 12 (Contrast) Feature: 14 (Select color preset) Values: 05: 6500 K 08: 9300 K 0b: User 1 Feature: 16 (Video gain: Red) Feature: 18 (Video gain: Green) Feature: 1A (Video gain: Blue) Feature: 52 (Active control) Feature: 60 (Input Source) Values: 11: HDMI-1 12: HDMI-2 0f: DisplayPort-1 00: Unrecognized value Feature: AC (Horizontal frequency) Feature: AE (Vertical frequency) Feature: B2 (Flat panel sub-pixel layout) Feature: B6 (Display technology type) Feature: C0 (Display usage time) Feature: C6 (Application enable key) Feature: C8 (Display controller type) Feature: C9 (Display firmware level) Feature: D6 (Power mode) Values: 01: DPM: On, DPMS: Off 04: DPM: Off, DPMS: Off Feature: DF (VCP Version) Feature: 62 (Audio speaker volume) Feature: 8D (Audio Mute) Feature: F4 (Manufacturer specific feature) Feature: F5 (Manufacturer specific feature) Values: 00 01 02 (interpretation unavailable) Feature: F6 (Manufacturer specific feature) Values: 00 01 02 (interpretation unavailable) Feature: 4D (Unrecognized feature) Feature: 4E (Unrecognized feature) Feature: 4F (Unrecognized feature) Feature: 15 (Unrecognized feature) Values: 01 06 11 13 14 18 28 29 32 48 (interpretation unavailable) Feature: F7 (Manufacturer specific feature) Values: 00 01 02 03 (interpretation unavailable) Feature: F8 (Manufacturer specific feature) Values: 00 01 (interpretation unavailable) Feature: F9 (Manufacturer specific feature) Feature: E4 (Manufacturer specific feature) Feature: E5 (Manufacturer specific feature) Feature: E6 (Manufacturer specific feature) Feature: E7 (Manufacturer specific feature) Feature: E8 (Manufacturer specific feature) Feature: E9 (Manufacturer specific feature) Feature: EA (Manufacturer specific feature) Feature: EB (Manufacturer specific feature) Feature: EF (Manufacturer specific feature) Feature: FD (Manufacturer specific feature) Values: 00 01 (interpretation unavailable) Feature: FE (Manufacturer specific feature) Values: 00 01 02 (interpretation unavailable) Feature: FF (Manufacturer specific feature)pi@Pi5-SN530-256:~ $ ddcutil vcpinfo 10 --verboseVCP code 10: Brightness Increase/decrease the brightness of the image. MCCS versions: 2.0, 2.1, 3.0, 2.2 MCCS specification groups: Image ddcutil feature subsets: PROFILE, COLOR Attributes: Read Write, Continuous (normal)pi@Pi5-SN530-256:~ $ Statistics: Posted by aBUGSworstnightmare — Fri Nov 08, 2024 5:54 am