Backlight: Difference between revisions

@@ Line 75: / Line 75: @@
 </syntaxhighlight>
-You can then bind this to a hotkey or similar. <code>sudo</code> may be avoidable if your user is in the correct group, or udev rules have set the appropriate <code>/sys</code> permissions.
+You can then bind this to a hotkey or similar.
-Add <code>i2c-dev</code> to <code>boot.kernelModules</code> and {{nixos:package|ddcutil}} to your system packages to make permanent.
+To make this permanent, add {{nixos:package|ddcutil}} to your system packages, and enable i2c support.<syntaxhighlight lang="nix">
+hardware.i2c.enable = true
+</syntaxhighlight>To interact with DDC/CI without root, also add your user to the <code>i2c</code> group (or the group defined by <code>[https://search.nixos.org/options?show=hardware.i2c.group&query=hardware.i2c.group hardware.i2c.group]</code>), or [https://www.ddcutil.com/i2c_permissions/ set udev rules manually].
 === Via <code>ddcci-driver</code> ===