nixos/v4l2-relayd: Don't create dummy video device

2026-04-18 03:29:57 +02:00
parent bb22c84e70
commit 6fa956a730
1 changed files with 5 additions and 0 deletions
@@ -221,6 +221,11 @@ in
      boot = mkIf ((length enabledInstances) > 0) {
        extraModulePackages = [ kernelPackages.v4l2loopback ];
        kernelModules = [ "v4l2loopback" ];
+        # Prevent v4l2loopback from auto-creating a device at load time. An
+        # unconfigured device has a degenerate framerate range that breaks
+        # GStreamer caps negotiation. All devices are created at runtime via
+        # v4l2loopback-ctl add in each instance's preStart instead.
+        extraModprobeConfig = "options v4l2loopback devices=0";
      };

      systemd.services = mkInstanceServices enabledInstances;