From 84e6784aaed60fe10d322fa50ad9a44339a9e9e0 Mon Sep 17 00:00:00 2001
From: worldofpeace <worldofpeace@protonmail.ch>
Date: Fri, 27 Sep 2019 18:07:43 -0400
Subject: [PATCH] nixos/gdm: add nvidiaWayland option

---
 .../services/x11/display-managers/gdm.nix     | 23 ++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/nixos/modules/services/x11/display-managers/gdm.nix b/nixos/modules/services/x11/display-managers/gdm.nix
index e5990aec4b9c..4830ec0030b2 100644
--- a/nixos/modules/services/x11/display-managers/gdm.nix
+++ b/nixos/modules/services/x11/display-managers/gdm.nix
@@ -88,11 +88,21 @@ in
       wayland = mkOption {
         default = true;
         description = ''
-          Allow GDM run on Wayland instead of Xserver
+          Allow GDM to run on Wayland instead of Xserver.
+          Note to enable Wayland with Nvidia you need to
+          enable the <option>nvidiaWayland</option>.
         '';
         type = types.bool;
       };
 
+      nvidiaWayland = mkOption {
+        default = false;
+        description = ''
+          Whether to allow wayland to be used with the proprietary
+          NVidia graphics driver.
+        '';
+      };
+
       autoSuspend = mkOption {
         default = true;
         description = ''
@@ -197,6 +207,17 @@ in
 
     services.dbus.packages = [ gdm ];
 
+    # We duplicate upstream's udev rules manually to make wayland with nvidia configurable
+    services.udev.extraRules = ''
+      # disable Wayland on Cirrus chipsets
+      ATTR{vendor}=="0x1013", ATTR{device}=="0x00b8", ATTR{subsystem_vendor}=="0x1af4", ATTR{subsystem_device}=="0x1100", RUN+="${gdm}/libexec/gdm-disable-wayland"
+      # disable Wayland on Hi1710 chipsets
+      ATTR{vendor}=="0x19e5", ATTR{device}=="0x1711", RUN+="${gdm}/libexec/gdm-disable-wayland"
+      ${optionalString (!cfg.gdm.nvidiaWayland) ''
+        DRIVER=="nvidia", RUN+="${gdm}/libexec/gdm-disable-wayland"
+      ''}
+    '';
+
     systemd.user.services.dbus.wantedBy = [ "default.target" ];
 
     programs.dconf.profiles.gdm =