Keyboard layout selector only supports max of 4 layouts

[Alan Pope 🍺🐧🐱 🦄]

I am trying to debug a keyboard layout issue. I have added four keyboard layouts and can no longer add any more. This seems a rather arbitrary limit on the number of keyboard layouts allowed. Can it be increased?

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: gnome-control-center 1:3.2.2-2ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-9.16-generic 3.2.1
Uname: Linux 3.2.0-9-generic x86_64
NonfreeKernelModules: nvidia wl
ApportVersion: 1.91-0ubuntu1
Architecture: amd64
Date: Fri Jan 20 08:12:21 2012
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta amd64 (20110901)
SourcePackage: gnome-control-center
UpgradeStatus: Upgraded to precise on 2011-12-22 (28 days ago)
usr_lib_gnome-control-center:
 deja-dup 21.2-0ubuntu4
 gnome-bluetooth 3.2.1-1ubuntu3
 indicator-datetime 0.3.1-0ubuntu3

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Alan Bell (alanbell)]

I think it might be because the libxklavier engine is reporting it can do a maximum of 4 keyboard layouts
http://xlibs.freedesktop.org/xkbdesc/doc/libxklavier-xkl-engine.html#xkl-engine-get-max-num-groups
no idea where it gets this from, but the limit does not appear to be in gnome-control-center itself

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.