You may want to try ddcrontrolTo probe I2C devices to find monitor buses use:To read value of control 0x10 (brightness on VESA compliant monitors) for device:
(HDMI0 on Pi4 is I2C-20, HDMI1 on Pi4 is I2C-21)To set value of control 0x10 (brightness on VESA compliant monitors) to 75 for device:See 'ddccontrol -h' for more information (as it's a while since I've used ddcontrol the last time).
Code:
sudo apt install ddccontrol gddccontrolCode:
sudo ddccontrol -p(HDMI0 on Pi4 is I2C-20, HDMI1 on Pi4 is I2C-21)
Code:
sudo ddccontrol -r 0x10 dev:/dev/i2c-20Code:
sudo ddccontrol -r 0x10 -w 75 dev:/dev/i2c-20Statistics: Posted by aBUGSworstnightmare — Tue Feb 13, 2024 10:48 am