Situation: Two laptops using the same USB keyboard and USB mouse (that are both connected to the display which also serves as a USB hub; switching is done by USB cable from the display to the respective laptop). One laptop has Ubuntu 10.04 and works fine, the other Ubuntu 12.04 and this one appears to have the following problem.
When I start it with USB cable from monitor connected everything works OK, but when I either connect USB cable after logging in or disconnect the cable (to use the keyboard for the other laptop) and then reconnect it again, some Unity shortcuts, such as Super + S for showing multiple desktops grid or Super + A for that Unity application menu, do not work.
I have to logout and login back, which of course mean to close everything and is very inconvenient.
Is there any easier way to make it work, restarting some service or something? Thx.