I'm trying to use a Dell mouse and keyboard via a single USB port using the USB splitter hub, but the devices seem to misbehave. Just one of the devices work when I connect both. I figured out it's a power issue. But, generally, the output of a USB port must be maximum 500mA and my mouse only needs 100mA, and the keyboard, 50mA at most. So, I assumed that both should work.
I checked the voltages using the multimeter and the result was this: voltage of other 3 ports in my 4 port hub drops to 0.81 volts as soon as I plug in any device. The current output was maximum 0.18~ 0.2 Amperes. Is there a problem with my USB port (it's a USB 3.0 port)?