Mouse clicks don't work though mouse moves the pointer.
This happens infrequently, once in a day or two. I am using two pc's, a
raspberrypi and a Ubuntu Studio each with its own Logitech usb keyboard
and have experienced this problem on both systems.
I have tried to recover with various keyboard entries - ctl-c, cti-d,
esc, q and by disconnecting and reconnecting the keyboard. Nothing but a
reboot solves the problem. I use ctl-alt-f1 to open a terminal, sign in
and enter shutdown -r now to do this. There is no problem with the
keyboard.
Is this a known problem? Is there a known solution?