From a258f0c86127cb32ee1cab7c391d3c1d58d76584 Mon Sep 17 00:00:00 2001
From: Jordan Holt <jordan@vimium.com>
Date: Sat, 3 May 2025 21:56:51 +0100
Subject: [PATCH] hyprland: GSK_RENDERER=ngl

Mitigate an issue with GTK4 apps becoming unresponsive and logging the
message:

vkWaitForFences(): The logical or physical device has been lost. (VK_ERROR_DEVICE_LOST) (-4)

According to https://gitlab.gnome.org/GNOME/gtk/-/issues/7441 this
manifests when running:
- Fractional scaling
- GTK < 4.18
- nvidia driver <= 570
---
 users/jordan/common/optional/graphical/hyprland/default.nix | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/users/jordan/common/optional/graphical/hyprland/default.nix b/users/jordan/common/optional/graphical/hyprland/default.nix
index 55b6297..aa8f948 100644
--- a/users/jordan/common/optional/graphical/hyprland/default.nix
+++ b/users/jordan/common/optional/graphical/hyprland/default.nix
@@ -12,6 +12,7 @@ let
     elem
     mapAttrs
     mkIf
+    versionOlder
     ;
   inherit (lib.generators)
     toINI
@@ -36,6 +37,8 @@ let
       if elem "nvidia" osConfig.services.xserver.videoDrivers then
         {
           GBM_BACKEND = "nvidia-drm";
+          GSK_RENDERER =
+            if versionOlder osConfig.hardware.nvidia.package.version "570" then "ngl" else "vulkan";
           LIBVA_DRIVER_NAME = "nvidia";
         }
       else