I sure hope this is a novel problem as I have tried to find a solution to it every time I get really fed up with this, which has been quite a few times, but no luck so far.
Trouble is that when my CPU is under heavy load then my wireless mouse (HP Z4000) starts to lag a LOT.
The strange thing is that if I move the mouse closer to the receiver on the PC, the lag goes away. It's not a solution though, because when I say closer, I mean about 10-15cm from the receiver, which is not feasible when trying to use a laptop with an external monitor, a mouse and keyboard attached.
Also the touchpad works just fine. For example if I load a huge file the wireless mouse refuses to cooperate until either the file has finished loading or I close it using keyboard or touchpad, which remain usable.
I have tried with all four USB ports (2×2.0, 2×3.0) and the problem persists.
Is it possible, that high CPU load draws power from the USB ports so the signal strength weakens?
I'm using an HP Elitebook G840(i5-4200U, 4GB RAM) and Ubuntu 14.04.
Anything else I should add here that would help?
Best Answer
I experienced the same thing on my desktop computer with a Logitech mouse. In my case, I think it was temperature related. High CPU usage caused everything connected to the motherboard to heat up. When I connected the receiver to the far end of a USB extension cord, the problem went away.