[Bug 71789] [r300g] Visuals not found in (default) depth = 24

https://bugs.freedesktop.org/show_bug.cgi?id=71789

--- Comment #27 from erhard_f@mailbox.org --- Built piglit from svn on Ubuntu MATE 16.04 ppc. Already the sanity test fails, specifically: root@T800:~/build/piglit# /root/build/piglit/bin/gl-1.0-readpixsanity -auto -fbo RGB(A) worst-case error was 6.641274 bits at (32, 80) expected (0.840188, 0.394383, 0.783099, 0.798440) got (0.799995, 0.784309, 0.396076, 0.839211) Depth worst-case error was 23.862089 bits at (107, 6) expected 0.911647; got 0.002813. Stencil failed at (0, 1). Expected 255; got 233. PIGLIT: {"result": "fail" }

But I must admit that I've no experience with piglit, built and used it for the first time.