KVM Model:
1.4 Display Port KVM Switch - Dual Monitor - Two Computer
USB Interface (5-gigabit or 10-gigbit):
10-gigbit
Problems:
My work laptop only has hdmi out, so I’m using powered hdmi>DP adapters and i’m assuming my problems with connectivity are related to these adapters
One monitor only works when KVM set to PC 1. On PC 2 there is no signal
The Other monitor is capped at 60hz or 75hz, it should do 144hz (probably the adapters im using)
adapters I’m using is a ‘Cable Matters HDMI to DisplayPort Adapter’
any suggestions for what would make this setup functional? the refresh rate isnt important but getting both monitors to work would be great
appreciate any help ~
Other Notes:
Shot in the dark, but, [Win ctrl shift B] on laptop.
Oh, also, “custom resolution” (and refresh rate) settings, on laptop.
Other thing to consider. USB C alt mode DP, and a DP MST hub.
And if it’s a thunderbolt USB C port, there are dirt cheap used OEM hubs that have multiple DP ports.
One is a miniDP, but that’s a passive pin-to-pin conversion.
That would seem like it’s the case. If you look at their website → here
it shows:
This adapter isn’t the best. You’ll want a proper DP 1.4 adapter for stable 1440p @ 144hz.
We like to use the Club3D active adapter:
What is monitor 1? How long are the cables? Do you have an adapter here too?
Thank you -
Yeah I overlooked the resolution and refresh capabilities of the adapters and assumed any powered adapter would be capable. I have a proper adapter now for the one monitor and the refresh rate on the other is fine for what I need.
Monitor one is an Aorus FO48U - it has a built in KVM switch which might have been causing issues since disconnecting the extra usb cables and having it only connected to the KVM made it work.
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HDMI → DP is a surprisingly difficult connection because HDMI has less pins than DP. It needs an “active” connection to compensate for the lack of pins. Good adapters are a little difficult to find.
Is your problem resolved or do you need further help?
… No.
EDIT: Both have 4 crucial differential pairs, plus hot plug/EDID.
Hm? Yes? HDMI has 19 and DP has 20
That’s not why it’s hard.
And the only reason they’re less common, is because the use case is far less common.
hmm I don’t know about that…
Going from 19 pins to 20 pins requires this special "active connection that requires power and additional PCB.
This is from Dell’s website:
Active adapters use additional chips to make the conversion inside the adapter, regardless of whether the source supports DP++. This means that active adapters are more expensive than passive adapters.
Needing more consideration and being expensive because of this in turn would make it harder to produce than a passive connection like DP → HDMI
Let me just say, DP to VGA, and HDMI to VGA.
Also “This is from Dell’s website:” kind of speaks for itself.
Any adapter/scaler is hard, it might not seem that way with how common and cheap some are.