**Guido Günther** @agx@librem.one · Jul 30, 2020, 14:37

**Guido Günther** @agx@librem.one · Jul 30, 2020, 14:37

Guido Günther @agx@librem.one

Jul 30, 2020, 14:37

Guido Günther @agx@librem.one

@purism Glimpse of a #librem5 driving an external screen via usb-c's #dp-alt-mode:

dece16f61594c451.mp4?1596119745

**Guido Günther** @agx@librem.one · Sep 08, 2020, 16:32

**Guido Günther** @agx@librem.one · Sep 08, 2020, 16:32

Sep 08, 2020, 16:32

Guido Günther @agx@librem.one

@purism And here's the #librem5 connected to a usb-c hub that has a keyboard/mouse connected via usb and driving the external screen via dp-alt-mode. Needs some hacks still but we're getting there:

984853561b90bed8.png?1599582561

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**amosbatto** @amosbatto@librem.one · Sep 10, 2020, 08:48

**amosbatto** @amosbatto@librem.one · Sep 10, 2020, 08:48

Sep 10, 2020, 08:48

amosbatto @amosbatto@librem.one

@agx @purism , That's awesome!

Do you have any idea what will be the max resolution supported by DisplayPort alt-mode on the Librem 5? That question came up on the Purism forum last year.

**Guido Günther** @agx@librem.one · Sep 10, 2020, 09:24

**Guido Günther** @agx@librem.one · Sep 10, 2020, 09:24

Sep 10, 2020, 09:24

Guido Günther @agx@librem.one

@amosbatto @purism with an adapter that can use all 4 DP lane pairs we should be able to get up to 4k@60Hz , the 'regular' hubs only uses 2 lane pairs (4k@30Hz) - but my screens have way lower resoluiton so that's not tested yet.

**amosbatto** @amosbatto@librem.one · 2020-09-11T02:18:37Z

amosbatto @amosbatto@librem.one

@agx @purism, I checked the i.MX 8M Quad data sheet and it says that it only supports DisplayPort 1.3 with a max resolution of 4K at 30fps. Still nice to know that 4K is theoretically possible. I was only expecting 1080p video, so I will be happy if we can get anything higher than that.