I have recently been given a PWAY 4 way KVM switch (Model PW-SH0401B) so I can use one screen/mouse/keyboard with 4 Raspberry Pi I am using for some research work. Although it works when I attach my desktop or my laptop, it will not seem to detect that the Pi is attached. Is this a HDMI issue as it states it is compliant with HDMI 1.4 standard but also that it supports maximum video resolution up to 4K x 2K @ 30Hz or lower. Any ideas?
Additional: Apologies for the rather vague and poorly worded question.