This reverts commit
393143615d9f2f581d87387268dc11b95adc339c, which
was commit
f05bb0c7b624252a5e768287e340e8e45df96e42 upstream.
This has been found to cause GPU hangs when backported to 3.2, though
not in mainline.
References: http://bugs.launchpad.net/bugs/1140716
Cc: Steve Conklin <sconklin@canonical.com>
Cc: Stefan Bader <stefan.bader@canonical.com>
Cc: Bradd Figg <brad.figg@canonical.com>
Cc: Luis Henriques <luis.henriques@canonical.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>