The test requires a framebuffer configuration that softpipe doesn't support
and leads to inconsistent results.
When run directly on softpipe all these tests fail because of the framebuffer
error, but with virglrenderer we don't report this error and the results that
are read back might be random.
Signed-off-by: Gert Wollny <gert.wollny@collabora.com>
Reviewed-by: Gurchetan Singh <gurchetansingh@chromium.org>