Guido Günther  

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

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Guido Günther  

@purism And here's the 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:

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amosbatto  

@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.

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Guido Günther

@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.

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amosbatto  

@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.

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Guido Günther  

@amosbatto @purism my data sheet says @60Hz so looking forward to try that on a suitable screen.

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Guido Günther  

@amosbatto @purism I'm pretty sure now that we can drive 4K UHD with the :

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amosbatto  

@agx @purism, Awesome. I have updated the community FAQ with info about convergence on the Librem 5:
source.puri.sm/Librem5/communi

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Guido Günther  

@amosbatto @purism Regarding 4K@60Hz check social.librem.one/@agx/1049102 - i've confirmed that working.

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