Help Setting Up Dual Monitors w/Work Laptop

Hmm. That doesn’t have to also drive the monitors, does it?

That’s not an issue for me because i use the integrated keyboard of each of the laptops (work, personal, gaming, travel) and i rarely use a mouse. I usually use the integrated touchpad. And when i do use a mouse, i use wireless mice, in a way that’s not relevant to your set up.

I may just start going into the office five days a week. :worried:

Yeah, unfortunately my desk has a little recessed keyboard shelf so I can’t easily just use a laptop at my desk. Replacing the whole desk would be prohibitively expensive, because it’s a fancy hydraulic standing desk (which I can’t use for that purpose due to my setup, but oh well.)

Can you raise and lower it a few inches? Because that would let you use the shelf for the stand-asking keyboard and the desktop for the laptop.

But if you don’t mind plugging into a couple of things instead of just one tidy port, you can plug in your keyboard to a USB C port on your laptop.

Or use something like this

I may end up having to do this.

Note that the docking station i linked to also connects to two monitors. It’s designed to connect to a mouse, a keyboard, and two monitors. But im pretty sure it doesn’t do power, you’d need a separate power cord.

I’m gonna try the KVM switch with thunderbolt and see where it gets me. If that doesn’t work, I’ll try the docking station. Worst case scenario I guess is actually having to go to work.

At least I’ll have two new gaming home PC monitors for games I never have time to play!

Fwiw, according to your link, your monitor has two hdmi ports and a dp port. It almost certainly has a way to switch between inputs built-in. You can probably leave both devices attached to it and toggle through some screen menus to switch back and forth.

Not the most convenient solution, but it’s an option.

My uncle is the one who bought me Clair Obscur and he keeps badgering me to play it and I’ve been putting off playing it. He’s a computer engineer. I just texted him: “I’m sorry to do this to you, but if you help me, I’ll play Clair Obscur over break.”

We’ll see if he has any ideas.

I mean, I already have the switch for the keyboard and mouse, right? If I have to spend five minutes or less every morning before work to set things up, is it really the end of the world?

Sorry for the late reply. Had fam visiting last night.

Can you just double-check real quick to make sure your laptop actually has Thunderbolt, please? It should look like this, with the little lightning logo:

If so, I believe this KVM will work. It’s worth a shot, IMHO. You would:

  • Connect laptop via a Thunderbolt 3 cable (if you want to be safe, try to buy one that’s actually a Thunderbolt 3+ cable (with the logo on the cable itself), as opposed to plain USB-C… some USB-C cables will work, but genuine Thunderbolt cables help eliminate the guessing game)
  • Connect desktop via the USB port and two separate DisplayPort cables (hopefully your desktop PC has two? I’m not sure if this setup will allow daisy-chaining from one DP cable). You shouldn’t need to plug in HDMI anywhere.
  • Connect switch to both monitors via a DisplayPort cable each
  • You shouldn’t need HDMI anywhere, just the switch, a Thunderbolt 3 cable, 2x DisplayPort male-to-male cables, and a USB 3.2 male-to-male cable.

I am not 100% certain of this setup, but I think it’s worth a try. Maybe @What_Exit can take a look too, or @echoreply or @SenorBeef? I’ll also page the nerds over at PC Gaming general discussion (Gaming PCs, game sales, news, etc...) to see if they might have ideas.

I think those only mirror the one outgoing display, so they won’t be helpful unless you really want to see the same emails on both monitors :slight_smile:

Oh geeze, certainly we can figure SOMETHING less of a hassle than that!

But on that note, maybe take a pic and note down what kind of dock/hub they have at the office the next time you’re in? It would help confirm the kind of setup that does work with your laptop (though you’d still have to figure out the KVM part for your desktop, and also consider the slightly higher bandwidth of your new monitors).

Yeah, this is another option too. You can just use a keyboard + mouse switch and manually move the monitor plugs… but you would STILL need a solution to go from your laptop to the two monitors (either Thunderbolt → dock → DisplayPort → monitors, or Thunderbolt to DisplayPort → monitor and HDMI → monitor).

As far as I know — I’m not positive on this — you can’t go from one HDMI port to two separate displays (unless you want to just mirror them). Thunderbolt/DisplayPort can do that via a dock/hub or daisy-chaining, but I don’t think HDMI can.

I think the KVM you listed is worth a shot, but let’s also see if anyone more knowledgeable chimes in…

You’ve helped me. I think I figured out one piece. This is not a KVM switch solution.

Thunderbolt port with two HDMI hooked up to laptop, for laptop configuration.

One HDMI and one DP hooked up to both monitors, for PC configuration.

Rotate through inputs on monitors accordingly.

Unsure about keyboard and mouse.

This is an aside (because it doesn’t mean that KVM won’t work for your needs, just a slight clarification):

That KVM you listed actually isn’t a certified Thunderbolt device (as in, it didn’t go through the Thunderbolt testing + certification process and thus doesn’t carry the trademarked Thunderbolt logo). It just says “for Thunderbolt laptops”, a common weasel-wording strategy on Amazon listings.

Despite that, it’s probably OK (since both computers are Windows PCs). True, certified, Thunderbolt devices are more expensive — it makes sense to buy Thunderbolt cables because they’re only a few dollars more and eliminate much of the guesswork, but it isn’t necessary to find a more expensive true Thunderbolt dock if this one will work (according to its specs and reviews, at least).

Without Thunderbolt, I think the dock uses multi-stream transport over USB-C… same end result (2x computers to 2x monitors), just through a slightly different technology, despite being sent over the same cable. Confusing, innit? Doesn’t matter, I still think it’s worth a shot.

If you want to be even more confused, I think it breaks down into something like this…

Expand to self-confuse
  • USB-C is just the physical shape of the port and cable. It carries many things and causes much confusion and suffering.
  • Over USB-C you can send various protocols, including but not just DisplayPort video
  • This particular dock probably receives DisplayPort “multi-stream transport” (MST) (one output to many monitors) from your computer. Then it does internal processing to split the stream onto two DisplayPort monitors (and optionally, converts the signal to HDMI for another). This only works with Windows, because Macs don’t support MST.
  • Thunderbolt is another competing protocol, really more of a “carrier” protocol that embeds video, audio, USB, ethernet, power, and more. It is a strict superset of regular USB-C, so anything Thunderbolt should be able to do all the other normal USB-C functions too. ← This is the reason the dock would still likely work, despite not being a strict Thunderbolt device.
  • (Not relevant here) If you instead had a Thunderbolt computer, cables, and dock, it would then use Thunderbolt’s own different multi-monitor implementation instead of DisplayPort MST. It’s just a packaging difference… the end result is still the same.
  • In any sort of USB-C setup, the “weakest link” dominates. Your TB3 laptop and cable probably aren’t technically sending Thunderbolt to the dock, just DisplayPort Alt Mode MST over USB-C, but because the Thunderbolt cables are a superset of regular USB-C, it’s fine. The dock is actually your “weakest link”, but in this case even the weakest link supports 2x 4k@120Hz, so you can still power those two monitors via DisplayPort (at 120 Hz or maybe even 144 Hz since your resolution is less than 4k).
  • TLDR I still think it will work. All Thunderbolt (the cable) is doing in this case is helping to ensure that you’re getting a higher-quality USB-C cable that has the bandwidth for all this stuff the dock wants.

So I checked, and I don’t have the correct thunderbolt port to use this. Mine is charging and data transfer only. But it should work for HDMI to two monitors (one HDMI and one thunderbolt port on laptop) and it does work exactly like that, with the dock at my work setup.

And my home PC should work with one DP and one HDMI.

All I need to figure out now is if my switch for switching the keyboard and mouse will work with two monitors.

So, if you can’t get the switch to work for the monitors, i think you can plug one displayport cable and one HDMI cable into each monitor, and then manually plug one of each into each computer. And you might be able to leave those plugged in and toggle at the monitor level.

I looked and the input on my switch is directly to my PC (not any monitors) so I think the switch will work regardless of the number of monitors.

I found this for the laptop:

This is all very confusing to me, but I think I’m starting to understand.

Your desk contains:

  1. Dell S2722DGM curvy monitor
  2. Other Dell S2722DGM curvy monitor
  3. keyboard
  4. mouse
  5. camera
  6. microphone (possibly built into camera)
  7. bluetooth speaker

You want to be able to use all of this on your work laptop, and your home desktop, preferably without having to swap a bunch of cables every time you switch.

Lots of advice on various docks and KVMs that I didn’t investigate in detail, but I may be able to help with:

Does it bother you if you have to control your TV with 3 or more remote controls? Just asking…

My advice is to get a USB hub and plug the keyboard, mouse, and camera (with mic?) into it. Now you only have a single USB port that needs to be moved between your laptop and desktop. The KVM can probably handle this, unless! it only supports ancient USB1 for mice and keyboards.

Can you use the bluetooth speaker for Teams calls now? As described, you can select the available audio and video devices that Teams uses. Connect the bluetooth speaker to your laptop, then go into Teams and select that as the audio out device. Connect the camera/mic (somehow…) and do the same.

Fair warning though, bluetooth uses different profiles protocols four letter words to do audio depending on exactly what kind of audio it’s doing. A2DP is for music, and probably what your bluetooth speaker defaults to. For two-way audio it will use HFP or HSP.

If your bluetooth speaker has a builtin microphone, it may be able to switch to HFP mode, and you can use it like a speaker phone. I have a bluetooth speaker that can do that, but because all software is junk, when the speaker switches to HFP mode, the speaker notices it isn’t in A2DP mode, and the auto-off feature engages. It works great as a speaker phone for 120 seconds, and then turns off.

Anyway, that is all a diversion to say if your bluetooth speaker only does A2DP, Teams or Windows or the speaker might refuse to work as the audio device for calls, even if you’re using a different microphone. You can try this without messing with any of the monitor stuff.

You can always get a USB soundbar and plug it into the hub with the keyboard, mouse, and camera.

I do have this, with a switch, so I don’t have to remove and plug in the USB, I just push a button. I guess I just need a bigger one so I can add in the webcam. My stupid keyboard uses 2 USB ports.

Okay, I think I see all this working now. What a mess.

For the laptop, how does it connect to the dock at the office? You say it uses a single USB C cable for two monitors? Then why can’t you do the same with the KVM switch?

Even if it’s not Thunderbolt, if it works at the office, it’s probably using DisplayPort MST, which is what the KVM uses too.

Do you already own the kvm?

No, it connects at work with a thunderbolt + HDMI cable, so two cables. I understand now why it can’t work at home without a two-HDMI thunderbolt dock.

All I need is the thunderbolt dock

And a switch that supports 4 USB devices.

It’s pure blind luck that this might work, because of the exact configuration of ports on the monitors.

Wait, at work do you plug the laptop into a single dock, that has both an hdmi and a displayport cable coming out of it, it do you plug into two monitors with two cables?