From 6ddfee9a6dca186d20ed986a7ac9a3c54c06ae78 Mon Sep 17 00:00:00 2001
From: TredwellGit <tredwell@tutanota.com>
Date: Thu, 25 Mar 2021 00:35:58 +0000
Subject: [PATCH] nixos/rtl-sdr: blacklist DVB kernel modules

DVB kernel modules conflict with SDR.
https://osmocom.org/projects/rtl-sdr/repository/revisions/0847e93e0869feab50fd27c7afeb85d78ca04631/entry/debian/rtl-sdr-blacklist.conf
---
 nixos/modules/hardware/rtl-sdr.nix | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/nixos/modules/hardware/rtl-sdr.nix b/nixos/modules/hardware/rtl-sdr.nix
index 77c8cb59a3d..9605c7967f6 100644
--- a/nixos/modules/hardware/rtl-sdr.nix
+++ b/nixos/modules/hardware/rtl-sdr.nix
@@ -6,14 +6,13 @@ let
 in {
   options.hardware.rtl-sdr = {
     enable = lib.mkEnableOption ''
-      Enables rtl-sdr udev rules and ensures 'plugdev' group exists.
-      This is a prerequisite to using devices supported by rtl-sdr without
-      being root, since rtl-sdr USB descriptors will be owned by plugdev
-      through udev.
+      Enables rtl-sdr udev rules, ensures 'plugdev' group exists, and blacklists DVB kernel modules.
+      This is a prerequisite to using devices supported by rtl-sdr without being root, since rtl-sdr USB descriptors will be owned by plugdev through udev.
     '';
   };
 
   config = lib.mkIf cfg.enable {
+    boot.blacklistedKernelModules = [ "dvb_usb_rtl28xxu" "e4000" "rtl2832" ];
     services.udev.packages = [ pkgs.rtl-sdr ];
     users.groups.plugdev = {};
   };