[mythtv-users] How To Prevent Disabling of USB Devices When Idle

[Jay Foster]

I have an Intel NUC 7I5BNH as a frontend.  I use an IO Gear wireless 
keyboard/mouse with it.  The interface to the frontend is a USB dongle.  
When the frontend is idle for enough time, the screen saver kicks in.  
Usually, pressing a key or moving the mouse (trackball) will wake up the 
frontend.  However, if more time passes by, the frontend kernel goes to 
sleep too, and no amount of key pressing or mouse moving will wake it 
up.  I suspect that the kernel is disabling the USB keyboard/mouse 
wireless dongle.  Is there some way to prevent this?
Ubuntu 14.04.
Jay