Led to show alternative layout don't work

[Alexander Anisimov]

I have "Use keyboard LED to show alternative layout" set to "Scroll Lock". When I switch to alternative layout led blink once and off, although it should light steadily.

[Test case]
1. gnome-control-center > Region & Language > Input Sources > + > Add a non-latin keyboard layout. I tested with English (US) and Russian.
2. gnome-control-center > Keyboard > Shortcuts > Typing > Modifiers-only switch to next source. Choose a key combination like "Left Win".
3. gnome-tweek-tool > Typing > Use keyboard LED to show alternative layout > Scroll Lock
4. Tap the key combination to switch layout. Led will blink once and off. But it should light steadily.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: gnome-settings-daemon 3.8.6.1-0ubuntu11.1
ProcVersionSignature: Ubuntu 3.13.0-27.50-generic 3.13.11
Uname: Linux 3.13.0-27-generic i686
ApportVersion: 2.14.1-0ubuntu3.1
Architecture: i386
CurrentDesktop: GNOME
Date: Tue May 20 10:32:25 2014
SourcePackage: gnome-settings-daemon
UpgradeStatus: Upgraded to trusty on 2014-05-14 (5 days ago)