ci: Don't allow HW backends for CI runs

Reviewed-By: Gert Wollny <gert.wollny@collabora.com>
Signed-off-by: Robert Foss <robert.foss@collabora.com>
Signed-off-by: Jakob Bornecrantz <jakob@collabora.com>

ci/.gitlab-ci.yml

@@ -6,7 +6,10 @@ cache:
 
 variables:
   DOCKER_DRIVER: overlay2
-  RENDER_DEVICE: /dev/dri/renderD128
+# When running CI jobs, don't allow
+# HW backed renderes, due to the
+# variability it introduces.
+#  RENDER_DEVICE: /dev/dri/renderD128
 
 stages:
   - build

ci/run_ci_locally.sh

@@ -9,6 +9,10 @@ DOCKER_IMAGE=virglrenderer/ci
 
 # Use slightly less than half of available threads
 NUM_THREADS=$(expr $(expr $(nproc) + 2) / 3)
+
+# When running the erhm, CI, locally,
+# do use HW based backends, which
+# may introduce variabity.
 RENDER_DEVICE=/dev/dri/renderD128
 
 LOCAL_MESA_PATH="../$PROJECT_PATH/mesa"