diff --unified --recursive --text hyprland-test/src/hyprland/subprojects/wlroots/render/gles2/renderer.c hyprland-git/src/hyprland/subprojects/wlroots/render/gles2/renderer.c
--- render/gles2/renderer.c	2022-10-23 11:18:56.598893482 +1000
+++ render/gles2/renderer.c	2022-10-23 11:16:25.923036282 +1000
@@ -159,7 +159,7 @@
 		assert(wlr_egl_is_current(renderer->egl));
 
 		push_gles2_debug(renderer);
-		glFlush();
+		glFinish();
 		glBindFramebuffer(GL_FRAMEBUFFER, 0);
 		pop_gles2_debug(renderer);
 
diff --unified --recursive --text hyprland-test/src/hyprland/subprojects/wlroots/types/output/render.c hyprland-git/src/hyprland/subprojects/wlroots/types/output/render.c
--- types/output/render.c	2022-10-23 11:18:56.598893482 +1000
+++ types/output/render.c	2022-10-23 11:15:15.110308366 +1000
@@ -325,22 +325,7 @@
 }
 
 uint32_t wlr_output_preferred_read_format(struct wlr_output *output) {
-	struct wlr_renderer *renderer = output->renderer;
-	assert(renderer != NULL);
-
-	if (!renderer->impl->preferred_read_format || !renderer->impl->read_pixels) {
-		return DRM_FORMAT_INVALID;
-	}
-
-	if (!output_attach_back_buffer(output, &output->pending, NULL)) {
-		return false;
-	}
-
-	uint32_t fmt = renderer->impl->preferred_read_format(renderer);
-
-	output_clear_back_buffer(output);
-
-	return fmt;
+	return DRM_FORMAT_XRGB8888;
 }
 
 bool output_is_direct_scanout(struct wlr_output *output,