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> HDMI resolution, Resolution of external display via HDMI question
Radovan Garabík
post Jan 23 2019, 07:07 AM
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I am a (semiproud) new owner of the Gemini, and I am considering buying the Planet's HDMI adapter. However, I have a crucial question - what resolutions does the HDMI output support? Basically from the hardware point of view; by reading various discussion I am starting to suspect that this is fixed at the LCD resolution of 2160×1080. Since there are monitors (and especially projectors) that support only certain resolutions (or up to a certain resolution), is there a way of changing it? Has anyone here successfully connected Gemini HDMI in lower than native resolution mode? I am mostly interested in Android and Linux, but I am not sure if the current Debian supports HDMI at all.

Failing that, I would go rather for {chrome,mira}cast instead of the cable, but the same question remains, I am not sure if it is possible to change the resolution here.
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Adam Boardman
post Jan 26 2019, 01:38 AM
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I've not tried the cable much as we've not enabled it in Debian just yet so I cannot help with the output resolution options, actually I don't think I have any non 1080P HDMI screens anyway. I suspect/hope it just scales to fit. It is an independent output at the hardware level as can be seen in the presentation software. One rumour* that I have heard is that they might be trying to get the Cosmo to work with generic USB-C HDMI cables, and that this work might then also be back portable to the Gemini. So depending on how urgently you want external displays support it might be worth waiting the 6-12 months or whatever it takes for the Cosmo release to see if that ended up being possible. Then you could just get a generic cable that would work across many devices.

* - someone in Telegram chat room asked Planet and reported back
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