16.04 - Gnome3 Freezing / Hanging / Unresponsive - can't restart - Ask Ubuntu


i running ubuntugnome 16.04. gnome3 interface useful because of touch support (helpful various peripherals, desktop), hangs every - specific programs (firefox number of tabs open, virtual box running cad program on windows 7 x64 ultimate, etc).

the mouse responds moving around screen, doesn't accept other inputs (no clicks, , keeps state in - e.g. 'move cross', waiting icon, etc). the keyboard doesn't accept inputs.

i have tried alt+f2-->r-->enter, ctrl+alt+f1, ctl+alt+f2 (or f3, etc). nothing works, keyboard 'unresponsive'

however ... multiseat (2, precise) system. other seat responsive.

q1: how overcome keyboard not being responsive?

q2: can restart gnome instance in seat1 seat2?

thanks!


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