I had an issue with NoMachine set up. The default key was alt+ctrl+left key or zero. But somehow it did not work.
I had a shortcut assigned to speaker volume by alt+ctrl+up arrow. This helped.
One solution is to uncheck the mouse and keyboard "grab" option in the setting.
I had a shortcut assigned to speaker volume by alt+ctrl+up arrow. This helped.
One solution is to uncheck the mouse and keyboard "grab" option in the setting.