Comment 5 for bug 1663062

OK, bisected and triaged.

Yesterday's Mesa 13.0.4 release has nothing to do with this as I have confirmed the same problem exists in Mesa 13.0.3.

Bisection reveals the regression occurred back in October and somehow we didn't notice:

revno: 3746 [merge]
author: Kevin DuBois <email address hidden>
committer: Tarmac
branch nick: development-branch
timestamp: Mon 2016-10-10 07:49:38 +0000
  nested: optimize fullscreen client surfaces by passing their buffers through the nested server to the host server without composing.
  (LP: #1262116). Fixes: https://bugs.launchpad.net/bugs/1262116.

  Approved by Daniel van Vugt, Cemil Azizoglu, mir-ci-bot.

Revision 3745 was the last known working.