Comment # 20 on bug 111077 from Matt Turner

Great. We've got a bisect, and reverting the commit from 19.0.8 fixes the
issue.

commit 9176703788c66de8287c6224650b1ff8d4238126
Author: Marek Olšák <marek.olsak@amd.com>
Date:   Wed Aug 8 15:37:21 2018 -0400

    radeonsi: increase the maximum UBO size to 2 GB

    Same as the closed driver.

    This causes a failure in GL45-CTS.compute_shader.max, which has a trivial
    bug.

    Tested-by: Dieter Nützel <Dieter@nuetzel-hh.de>

(see https://bugs.gentoo.org/690066#c33)