I recently purchased an Aten KVM cs84u switch and just installed two pcs.
The first one is command line linux and works.
The second pc is Windows 10 and behaved well for about a week.
After that i installed a third one (Windows 10 also) and after the initial booting to Windows i faced the "D-SUB OUT OF RANGE 91.2 Khz /85 Hz" message.
But now the same happens on the second pc which originally worked well
Can anyone help me?