It looks like this wasn't actually enabled in the 1.11.4-0ubuntu8 package:
http://anonscm.debian.org/gitweb/?p=pkg-xorg/xserver/xorg-server.git;a=commitdiff;h=d8e24bf6634b0ef80a21ac1d1b13412d88aa7800;hp=3a70935e497c908419a2704e699e615d148718d3
This has been fixed in this packaging commit, and will be applied for 1.11.4-0ubuntu11:
http://anonscm.debian.org/gitweb/?p=pkg-xorg/xserver/xorg-server.git;a=commitdiff;h=5042d16f315953b76dc59a6d8063638a42f23b18;hp=362e84eae058b86a7a67b8993d0a1a2b57fac9a1
It looks like this wasn't actually enabled in the 1.11.4-0ubuntu8 package:
http:// anonscm. debian. org/gitweb/ ?p=pkg- xorg/xserver/ xorg-server. git;a=commitdif f;h=d8e24bf6634 b0ef80a21ac1d1b 13412d88aa7800; hp=3a70935e497c 908419a2704e699 e615d148718d3
This has been fixed in this packaging commit, and will be applied for 1.11.4-0ubuntu11:
http:// anonscm. debian. org/gitweb/ ?p=pkg- xorg/xserver/ xorg-server. git;a=commitdif f;h=5042d16f315 953b76dc59a6d80 63638a42f23b18; hp=362e84eae058 b86a7a67b8993d0 a1a2b57fac9a1