@purism …and here's a quick Quake II demo using the #librem5 docked via usb-c (audio is from L5's built in speaker) - might be a bit more exciting than running #libreoffice (which also works):
@amosbatto DisplayPort alt-mode is in fact how most USB-C to HDMI adapters work. HDMI alt-mode, although it exists, is rather rare and not supported that well across various hardware.
@dos, OK, that makes sense, but if DisplayPort Alt Mode is carrying an HDMI signal, we still have the same question for RYF certification.
Does the DCSS driver for the iMX8MQ no longer require the HDMI DRM blob or is the video being converted to HDMI outside the iMX8MQ?
@amosbatto DisplayPort alt-mode is carrying a DisplayPort signal, not HDMI. It's usually the adapter that converts it to HDMI.
@dos, Oh I assumed that DP alt-mode was like normal DP, but I Googled it and found that there is no DP Dual Mode (DP++) over DP alt-mode, so it isn't possible to send an HDMI signal over DP alt-mode. We will need an active adapter to convert from DP to HDMI.
This article explains it:
@amosbatto Yes, I know, and I said that earlier - most USB-C to HDMI adapters use DP alt-mode, which is universally supported, and not HDMI alt-mode, which is rather rare and can't be used together with USB signal at the same time.
@dos, HDMI alt-mode not being common gives me hope for the future. As more devices move to USB-C, we can get rid of HDMI, which requires licensing fees, and just use DisplayPort, which is a freer standard. Nice to find something positive in this dreary world.
@Phaserune @purism I need somebody holding the camera, then i can operate keybod and mouse.
@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 @purism my data sheet says @60Hz so looking forward to try that on a suitable screen.
@amosbatto @purism I'm pretty sure now that we can drive 4K UHD with the #Librem5:
@agx @purism, Awesome. I have updated the community FAQ with info about convergence on the Librem 5:
@amosbatto @purism Regarding 4K@60Hz check https://social.librem.one/@agx/104910284376175421 - i've confirmed that working.
@goatwildernesscollective @agx @purism Do you have the latest version of iOS?
@agx @purism Since we are taking PureOS; a full-blown desktop OS; and putting it on the Librem 5 phone, we have turned the entire market on its head. Android and iOS have been trying (and failing) to make their mobile OS a productivity desktop OS. This is very exciting to show the future already functioning.
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@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: