External 5K Monitor for the Libreum 15 rev3

I’m looking to get some more resolution for the Libreum 15 rev3 . I’m trying to go with 5k … In the LG UltraFine monitor I can use the thunderbold 3 port utilizing 8 video channels …

1 Thunderbold 3 Input 882 mega pixels per second

Todd says as of rev2 “[USB-C] supports video output on par with the first-gen Thunderbolt channel” … A few search titles imply this is a version of thunderbolt 3. :wink:


LG 27MD5KB-B UltraFine 27" 16:9 5K (5120 x 2880) IPS Monitor, 500 cd/m² Brightness, Thunderbolt 3/USB Type-C Inputs

The monitor does have a mic and camera that could by-pass the hardware cut switch. I’ll have to live with that, probably OK though given coreboot should make unauthorized access more difficult.

There are various thunderbolt 3 adapters that accept an HDMI + USB-C (or just USB) and provide a thunderbolt connection. I’m not finding any other 5k displays that are known to work on Linux so I guess it is back to the question: is the Librem’s first-gen Thunderbolt support going to work at 5k with this monitor?

No, this is old post. Current models, Librem 15v3 and Librem 13v3, do not have USB 3.1, only USB 3.0. So no video support, I’m afraid.

The current spec page has this:

External monitor output 1 micro HDMI Port 1 HDMI Port (4K capable) 1 HDMI Port (4K capable)

Does this go up to 4096 × 2160? It looks like there are 2 versions of 4k:

(UHD 4K) 3840 × 2160 pixels 16:9 Approx. 185 ppi Approx. 0.14 mm
(DCI 4K) 4096 × 2160 pixels Approx. 17:9 Approx. 149 ppi Approx. 0.17 mm

Guess I’ll give up on the adapter, looks like there is not much support hre for that. I do appreciate clarification though so I can make the best purchase.

You can get 4K UHD output but only at 30Hz. Please have a look here: https://tracker.pureos.net/T298#8485