Hello!

I have finished testing of latest packages 
gnome-control-center        1:3.6.3-0ubuntu45.1, 
gnome-settings-daemon       3.8.5-0ubuntu11.1.

You can view my Google Docs table.
Here I can summarize the results.

1. For Unity Session:
For all hotkeys non-latin shortcuts are still broken - see bug 1226962 (for example Ctrl+Alt+T does not open gnome-terminal).

* Default Super+Space and Shift+Super+Space in not working at all.
* Alt+Shift works
* Ctrl+Shift works (but Ctrl+Shift+C/V, +arrows is broken - see bug 1246656)
* Shift+Shift works
* Ctrl+Space works
* Ctrl+Shift+Space works
* Shift+Space works
* Super+Shift works
* Ctrl+Alt+Space works
* Alt+Shift+Space works
* Ctrl+Super works
* Shift+Backspace works
* Shift+Ctrl+Alt works
* Alt+CapsLock works, but opens HUD (bug to be posted)
* Alt+Ctrl works
* Alt+Alt works
* Ctrl+Ctrl works
* CapsLock works
* Caps Lock (to first layout), Shift+Caps Lock (to last layout)  works
* Caps Lock, Alt+CapsLock works, but opens HUD (bug to be posted)
* Left Ctrl+LeftWin (to first layout), RightCtrl+Menu (to second layout) works
* ScrollLock works
* Shift+CapsLock works

Single keys hotkeys are not working: Alt (opens HUD), Shift, Ctrl, Win (opens HUD). But IMHO they used very seldom as layout switchers.

2. For GNOME FlashBack (with effects)
For all shortcuts non-latin shortcuts are working (at least gnome-terminal open with Ctrl+Alt+T).

* Default Super+Space and Shift+Super+Space works.
* Alt+Shift works
* Ctrl+Shift works (but Ctrl+Shift+C/V, +arrows is broken - see bug 1246656)
* Shift+Shift works
* Ctrl+Space works
* Ctrl+Shift+Space works
* Shift+Space does not work (produce message [The shortcut "Shift+Space" cannot be used because it will become impossible to type using this key. Please try with a key such as Control, Alt or Shift at the same time. ])
* Super+Shift works
* Ctrl+Alt+Space works
* Alt+Shift+Space works
* Ctrl+Super works
* Shift+Backspace works
* Shift+Ctrl+Alt works
* Alt+CapsLock works, but type in capitals
* Alt+Ctrl works
* Alt+Alt works
* Ctrl+Ctrl works
* CapsLock works
* Caps Lock (to first layout), Shift+Caps Lock (to last layout)  works
* Caps Lock, Alt+CapsLock works
* Left Ctrl+LeftWin (to first layout), RightCtrl+Menu (to second layout) works
* ScrollLock works
* Shift+CapsLock works, but type in capitals

Single keys hotkeys are not working: Alt (opens HUD), Shift, Ctrl, Win. But IMHO they used very seldom as layout switchers.


3. For GNOME FlashBack (without effects)
For all hotkeys non-latin shortcuts are still broken - see bug 1226962 (for example Ctrl+Alt+T does not open gnome-terminal).

* Default Super+Space and Shift+Super+Space in not working at all.
* Alt+Shift works
* Ctrl+Shift works (but Ctrl+Shift+C/V, +arrows is broken - see bug 1246656)
* Shift+Shift works
* Ctrl+Space works
* Ctrl+Shift+Space works
* Shift+Space does not work (produce message [The shortcut "Shift+Space" cannot be used because it will become impossible to type using this key. Please try with a key such as Control, Alt or Shift at the same time. ])
* Super+Shift works (but reports this combination as Mod4+Super+Hyper+Shift L)
* Ctrl+Alt+Space works
* Alt+Shift+Space works
* Ctrl+Super works
* Shift+Backspace works
* Shift+Ctrl+Alt works
* Alt+CapsLock works
* Alt+Ctrl works
* Alt+Alt works
* Ctrl+Ctrl works
* CapsLock works
* Caps Lock (to first layout), Shift+Caps Lock (to last layout)  works
* Caps Lock, Alt+CapsLock works, but opens HUD (bug to be posted)
* Left Ctrl+LeftWin (to first layout), RightCtrl+Menu (to second layout) works
* ScrollLock works
* Shift+CapsLock works

Single keys hotkeys are not working: Alt, Shift, Ctrl, Win. But IMHO they used very seldom as layout switchers.



So there is a big progress of fixing this bug. Thank you, William Hua!

But there are remaining issues:
* default Super+Space and Shift+Super+Space does not work (bug 1245136)
* non-latin shortcuts are broken (see bug 1226962), 
* shortcuts starting with Ctrl+Shift+ got broken if layout switchin set to Ctrl+Shift (bug 1246656). 
* some shortcut combinations started with Win or Alt open a HUD.