Might be worth double checking there's no difference between the USB/Trackpad behaviour when powered, versus running on battery. I have sometimes seen artefacts similar to those you describe (lost input events) on my Q15R (N5100) when unpowered, which resolve themselves the moment you plug in the power cable.
Might be worth double checking there's no difference between the USB/Trackpad behaviour when powered, versus running on battery. I have sometimes seen artefacts similar to those you describe (lost input events) on my Q15R (N5100) when unpowered, which resolve themselves the moment you plug in the power cable.