fix: added workaround for work with nvk

Signed-off-by: Boris Yumankulov <boria138@altlinux.org>

usr/bin/portproton-gamescope

@@ -7,23 +7,19 @@ for i in "${HOME}"/.config/environment.d/*.conf; do
 done
 set +a
 
-# Fix intel color corruption
-# might come with some performance degradation but is better than a corrupted
-# color image
-export INTEL_DEBUG=norbc
-export mesa_glthread=true
+# Gamescope parameters
+GAMESCOPE_PARAMS=""
 
-# This should be used by default by gamescope. Cannot hurt to force it anyway.
-# Reported better framelimiting with this enabled
-export ENABLE_GAMESCOPE_WSI=1
-
-# Some environment variables by default (taken from Deck session)
-export SDL_VIDEO_MINIMIZE_ON_FOCUS_LOSS=0
-
-# Add custom vulkan adapter if specified
-if [ -n "$VULKAN_ADAPTER" ]; then
-	GAMESCOPECMD= " --prefer-vk-device $VULKAN_ADAPTER"
+# Check if NVK driver is in use
+if vulkaninfo 2>/dev/null | grep -i "driverName" | grep -q "NVK"; then
+	# Workaround for https://gitlab.freedesktop.org/mesa/mesa/-/issues/13478
+	GAMESCOPE_PARAMS+=" --backend sdl -f"
 fi
 
-# Start client application
-gamescope $GAMESCOPECMD -- portprotonqt --fullscreen
+# Prefer a specific Vulkan adapter if defined
+if [ -n "$VULKAN_ADAPTER" ]; then
+	GAMESCOPE_PARAMS+=" --prefer-vk-device $VULKAN_ADAPTER"
+fi
+
+# Start client application with Gamescope
+gamescope $GAMESCOPE_PARAMS -- portprotonqt --fullscreen