Initialize GPU backend in background by rendering a 1x1 image.

2 files changed, 12 insertions, 3 deletions

diff --git a/tests/python/eevee_render_tests.py b/tests/python/eevee_render_tests.py
index 89737fa8010..34c15872a11 100644
--- a/tests/python/eevee_render_tests.py
+++ b/tests/python/eevee_render_tests.py
@@ -103,6 +103,7 @@ def get_gpu_device_type(blender):
     command = [
         blender,
         "-noaudio",
+        "--background"
         "--factory-startup",
         "--python",
         str(pathlib.Path(__file__).parent / "gpu_info.py")
diff --git a/tests/python/gpu_info.py b/tests/python/gpu_info.py
index f964816c5cf..159eafed94e 100644
--- a/tests/python/gpu_info.py
+++ b/tests/python/gpu_info.py
@@ -1,13 +1,21 @@
 """
     Prints GPU backend information to the console and exits.
     
-    Use this script as `blender --python gpu_info.py`.
-    Doesn't work with `--background` parameter as then the GPU backend won't
-    be initialized.
+    Use this script as `blender --background --python gpu_info.py`.
 """
+import bpy
 import gpu
 import sys
 
+# Render with workbench to initialize the GPU backend otherwise it would fail when running in 
+# background mode as the GPU backend won't be initialized.
+scene = bpy.context.scene
+scene.render.resolution_x = 1
+scene.render.resolution_y = 1
+scene.render.engine = "BLENDER_WORKBENCH"
+bpy.ops.render.render(animation=False, write_still=False)
+
+
 print('GPU_VENDOR:' + gpu.platform.vendor_get())
 print('GPU_RENDERER:' + gpu.platform.renderer_get())
 print('GPU_VERSION:' + gpu.platform.version_get())