Confirmed. Unfortunately Alt presently triggers an active synchronous keyboard grab, in order to tell the difference between Alt taps and Alt+other_key. This grab sends events causing the current widget to lose focus.
The only two solutions to this bug I can think of are:
1. Don't bind the lone "Alt" key to the HUD in Unity 5. This is a Unity team design decision.
2. Rewrite the tapping detection in compiz to not use active grabs. Unfortunately I have tried this several times over the past month and again today and not yet succeeded.
Confirmed. Unfortunately Alt presently triggers an active synchronous keyboard grab, in order to tell the difference between Alt taps and Alt+other_key. This grab sends events causing the current widget to lose focus.
The only two solutions to this bug I can think of are:
1. Don't bind the lone "Alt" key to the HUD in Unity 5. This is a Unity team design decision.
2. Rewrite the tapping detection in compiz to not use active grabs. Unfortunately I have tried this several times over the past month and again today and not yet succeeded.