I'm running 16.04 with Unity desktop enviro, and periodically my desktop environment looses responsiveness. It often happens when I open Blender, Krita, Cura, and many other apps (just did it now when I opened the Calculator!)
The mouse still moves, but I can't click anything. I've discovered that I can recover my opening a terminal with the keyboard, then using
xkill. I click anywhere on the screen and
xkill causes the screen to flash, like it's killing some overlay that covered the entire screen blocking me from clicking anything. Then everything works again.
xkill doesn't actually kill the app that seemed to trigger the "freeze", all apps are still running fine.
How do I fix this?
Just occured again. Here's the output of
$ xprop _NET_WM_ICON_GEOMETRY(CARDINAL) = 5, 710, 54, 54 WM_STATE(WM_STATE): window state: Normal icon window: 0x0 _NET_WM_DESKTOP(CARDINAL) = 0 _NET_WM_ALLOWED_ACTIONS(ATOM) = _NET_WM_ACTION_ABOVE, _NET_WM_ACTION_BELOW XdndAware(ATOM) = BITMAP WM_PROTOCOLS(ATOM): protocols WM_TAKE_FOCUS WM_HINTS(WM_HINTS): Client accepts input or input focus: False WM_NAME(STRING) = "Hud" _NET_WM_PID(CARDINAL) = 7753 WM_CLIENT_MACHINE(STRING) = "mymachine" _NET_WM_WINDOW_TYPE(ATOM) = _NET_WM_WINDOW_TYPE_DOCK _NET_WM_STATE(ATOM) = _NET_WM_STATE_STICKY, _NET_WM_STATE_SKIP_TASKBAR, _NET_WM_STATE_SKIP_PAGER $ xkill Select the window whose client you wish to kill with button 1.... xkill: killing creator of resource 0x320001c