Backlight: Difference between revisions
Hughobrien (talk | contribs) Add section on controlling external monitors |
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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. <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. | ||
To make this permanent, add {{nixos:package|ddcutil}} to your system packages, and enable i2c support.<syntaxhighlight lang="nix"> | |||
hardware.i2c.enable = true | |||
</syntaxhighlight> | |||
=== Via <code>ddcci-driver</code> === | === Via <code>ddcci-driver</code> === | ||
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Device autodetection is tricky with i2c so we need to trigger it manually with the <code>0x37</code> code. The <code>sleep</code> is often unfortunately necessary. | Device autodetection is tricky with i2c so we need to trigger it manually with the <code>0x37</code> code. The <code>sleep</code> is often unfortunately necessary. | ||
The driver has had some issues with kernels > 6.8, the below overlay should allow it to build if you encounter issues. | The driver has had some issues with kernels > 6.8, the below overlay should allow it to build if you encounter issues ([https://gitlab.com/ddcci-driver-linux/ddcci-driver-linux/-/merge_requests/17 source]). | ||
<syntaxhighlight lang=nix> | <syntaxhighlight lang=nix> | ||