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screenshot of a terminal showing the following: sudo modprobe ddcci ls /sys/class/backlight it shows the internal laptop screen and ddcci11. Then I cat the value of /sys/class/backlight/ddcci11/brightness and it shows 100 then I show that brightnessctl can control the screen.

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screenshot of a terminal showing the following: sudo modprobe ddcci ls /sys/class/backlight it shows the internal laptop screen and ddcci11. Then I cat the value of /sys/class/backlight/ddcci11/brightness and it shows 100 then I show that brightnessctl can control the screen.
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fiona (vidister@chaos.social)'s status on Sunday, 26-Feb-2023 14:50:34 JST fiona

fyi, since many people don't know this exists:
Almost all computer screens made in the last decade support DDC/CI. (The Display Data Channel Command Interface).
You can use it to control stuff like the backlight brightness without fiddling with the awful screen buttons and OSD.
On Linux once you load the ddcci kernel module the screens appear in /sys/class/backlights and can be controlled like a laptop screen.

In conversation Sunday, 26-Feb-2023 14:50:34 JST from chaos.social permalink