Which USB-C to HDMI adapter to choose for Latitude 5590

This 2019 Latitude 5590 shipped with the onboard Intel UHD 620 GPU. Video out ports =
HDMI 1.4
VGA
USB-C/DP

Our users will need to know to what specific monitor model you are trying to attach and what video in ports it has?

Hi Chris.

I'm trying to hook it up to LG 42" C2 4K EVO - OLED TV

Model: OLED42C24LA

It has 4 x HDMI 2.1 ports available

@jphughan - are you around - and would you happen to know?
I stumbled upon your post about "demystifying usb-c and thunderbolt (link below - if others are interested) - and it made things a lot clearer to me - and explained why I could only get 30 hertz @ 4k on my external monitor.
Now I'm looking for an adapter that will do the job - connecting directly to the usb-c port - hence why I created this topic.

https://www.dell.com/community/en/conversations/laptops-general-locked-topics/demystifying-usb-c-and-thunderbolt-ie-adapter-and-dock-capabilitieslimitations/647f72fdf4ccf8a8de0bdce1

@vik74​ I’m not around much, but I do try to reply if someone mentions me — so here I am!

I’m not sure which system you have, but if it’s the Latitude 5590 mentioned in this thread topic or any other system that only supports DisplayPort 1.2 over USB-C, then if you want 4K 60 Hz out of your USB-C port you need either a USB-C to DisplayPort cable/adapter, or a USB-C to HDMI 2.0 cable/adapter. You would NOT be able to use a multi-purpose / “mini-dock” adapter that provided video output, USB 3.x ports, etc. There are some video output dongles/cables that also incorporate a USB-C power passthrough port, which would allow you to use your USB-C port for 4K 60 Hz and charging the system simultaneously. Those WOULD be usable, but that would be about all you can accomplish in terms of multi-purpose here. (In theory, if you had a multi-purpose dongle that only used USB 2.0 rather than USB 3.x for data, that would work too, but I don’t know of any multi-purpose adapters that offer 4K 60 Hz video output support and restrict all data functionality to USB 2.0.)

If that doesn’t help you find what you need, please provide more info about your system and overall setup/goals.

Great to have you around @jphughan 

I indeed have a Latitude 5590, and can provide you with the service tag in a DM if needed - if you would like to dive deeper into the hardware specifications on my particular device.

To boil it down - I am trying to hook my Latitude 5590 up directly from my USB-C port to my LG OLED TV (model: OLED42C24LA - further specs on the LG - here).

I am not going to use any Dell docking station of any kind - neither any third party docking solution.

(I have already tried the Dell WD15 and WD19s - but could only get 4k @ 30 hertz - which ultimately led me to your post about "demystifying usb-c and thunderbolt" as referred to in the post above).

All I'm looking for - is merely connecting the laptop to the TV directly using the USB-C port - so I am able to get 4k @ 60 hertz.

What I have tried so far - is some cheap no name USB-C to Displayport adapter. (and yes correct - displayport adapter - as my current setup uses a cable with Displayport at one end - and HDMI at the other end).

This yielded no output whatsoever.

The reason for this choice was that I could re-use my current cable - and that I could return the cheap no name adapter in case it didn't work.

Obviously this setup didn't work - adapter returned - done and dusted.

So instead of trying more useless no name adapters - why not buy a Dell branded one - USB-C to HDMI adapter (and then forget about using my existing displayport - hdmi cable) - and use a regular hdmi-hdmi cable?

In my first post - I link to two different Dell adapters - neither of them are "designed" for Latitude 5590 - and I can't find any documentation if one or the other would work regardless.

Question is - do you (or anybody else reading this post) know of a adapter (USB-C to HDMI) that will work for my setup - outputting 4k resolution @ 60 hertz.

Please let me know if you need further elaboration.

@jphughan - thanks for getting back to me.
You're detailed information is much appreciated.

I agree with you that a full USB-C to HDMI 2.0 cable is a simpler setup - but might end up costing more compared to just a USB-C - HDMI adapter.

My LG TV has 4 x HDMI ports which are all 2.1 - so AFAIK I'm all good on that side.

Thank you for your detailed information regarding Displayport - and why it was doomed from the beginning.

It all makes sense why there was no output to my external screen.

Yes my cable is with guarantee passive - and I wasn't aware of the limitations regarding the USB-C connector not supporting what I was trying to do!

Also thank you for elaborating on the "active" DisplayPort to HDMI cables/adapters - which definitely not seem to be the way to go either.

My next step will be to get a USB-C to HDMI adapter - hook it up to proper HDMI cable and see where it takes me (hopefully this time with a 4k output @ 60 hertz :))

Won't be until monday march 24 - but I will report back in this thread to let you (and others interested) know how it all goes.

Have a great weekend!

@jphughan​ 
I am back to report - that I now have the desired output.
4k output @ 60 hertz! YaY

What a relief - and what a journey to get here!

Just like you predicted - using a USB-C to HDMI adapter - and hooking it up to a proper HDMI cable made all the difference.

As soon as I connected the adapter to the HDMI cable coming from my monitor (TV) - I could -> Windows + P - and show output on 2nd screen only.

Now in the much desired 4k @ 60 hertz resolution - c",) ;-)

I'm so delighted that you took your time to elaborate on all the pitfalls that are present when you try to make - what seem to be a simple job of connecting a laptop to a 4k monitor (TV in my case).

I have definitely learned a lot from your detailed descriptions - and I can't thank you enough for taking your time to make it crystal clear what my issue(s) was (were).

I hope others that stumble upon this thread - or maybe your other post about how to 'demystify usb-c and thunderbolt' (for others reading this - there is a link further up in this thread) - can help steer other users struggling with getting their desired output in the right direction.

@vik74​ Thanks for the kind words! Glad you're squared away -- even if it was a bit of a journey to get there! -- and thanks for reporting back so others who might find this later can benefit from the discussion.

No problem :-)
And thanks again!