diff --git a/dot_config/uwsm/env-hyprland b/dot_config/uwsm/env-hyprland
index 9468ae6..6786229 100644
--- a/dot_config/uwsm/env-hyprland
+++ b/dot_config/uwsm/env-hyprland
@@ -14,3 +14,10 @@ unset igpu
 # though they render on the iGPU; when the eGPU drops off the bus, they
 # would be holding it. CUDA does not go through EGL and is unaffected.
 export __EGL_VENDOR_LIBRARY_FILENAMES=/usr/share/glvnd/egl_vendor.d/50_mesa.json
+
+# Vulkan through RADV only, same reasoning. The eGPU exists for LM Studio's
+# CUDA backend; its Vulkan backend surveying the NVIDIA ICD on first start
+# took the machine down (platform reset, no log) while CUDA work on the same
+# card (voxtype/parakeet) runs fine. Games and every other Vulkan app stay
+# on the iGPU. CUDA does not go through the Vulkan loader.
+export VK_DRIVER_FILES=/usr/share/vulkan/icd.d/radeon_icd.json