test: exercise usable high-DPI layouts with host-side rendering

2026-09-05 06:24:25 +00:00
parent 88e889bf65
commit 7c24d3639b
2 changed files with 21 additions and 9 deletions
@@ -41,9 +41,13 @@ pkgs.testers.runNixOSTest {
        "-display egl-headless,rendernode=${hostRenderNode}"
      ];
    };
-    environment.sessionVariables = pkgs.lib.optionalAttrs (hostRenderNode == null) {
+    # VirGL exposes OpenGL, not Vulkan. Keep GTK/WGPU off guest-side lavapipe.
+    environment.sessionVariables = {
+      GSK_RENDERER = "gl";
+      WGPU_BACKEND = "gl";
+    }
+    // pkgs.lib.optionalAttrs (hostRenderNode == null) {
      LIBGL_ALWAYS_SOFTWARE = "1";
-      # Prevent llvmpipe from monopolizing every emulated CPU under QEMU TCG.
      LP_NUM_THREADS = "1";
    };
    environment.systemPackages = [ pkgs.python3 ];