Indeed, the current state of VM support for Mir/Unity8 is:
(1) QXL works already (modulo that mouse problem, please log a new bug)
(2) VirtualBox will be next (aiming before 17.04): bug 1584894
(3) Generalised software rendering on fbdev or SimpleDRM later (still hoping for 17.04): this bug 1118903
Indeed, the current state of VM support for Mir/Unity8 is:
(1) QXL works already (modulo that mouse problem, please log a new bug)
(2) VirtualBox will be next (aiming before 17.04): bug 1584894
(3) Generalised software rendering on fbdev or SimpleDRM later (still hoping for 17.04): this bug 1118903