Author Topic: HDMI Output  (Read 3485 times)

MadMac

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HDMI Output
« on: November 12, 2018, 05:49:53 am »
Hi!

Any information if the Cosmo will have a standard HDMI-Output so any USB-C to HDMI cable can be used? Or is the same cable required as for the Gemini?

Marc

gidds

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HDMI Output
« Reply #1 on: November 12, 2018, 06:17:57 am »
Good question!

Other USB-related questions:
  • Will the Cosmo use the standard USB Power Delivery?  (Or just Mediatek's proprietary Pump Express, like the Gemini?)
  • Will the Cosmo be able to charge from a USB hub?
   Andy/
Psion 3a → Psion 5 → Psion 5mx → Gemini → Astro

Elevennails

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HDMI Output
« Reply #2 on: January 20, 2020, 02:36:52 pm »
All is good so far I'm now working on the 20200117_1823.

I'm wondering what the requirements for the hdmi support are. I have a startech hdmi to usb c adapter but it doesn't seem to work.

Has anyone else been able to connect to hdmi? Is the planet hdmi adapter proprietary?

I've tried both USB c ports.
« Last Edit: January 20, 2020, 02:39:05 pm by Elevennails »

mithrandir

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HDMI Output
« Reply #3 on: January 20, 2020, 04:58:31 pm »
Quote from: Elevennails
All is good so far I'm now working on the 20200117_1823.

I'm wondering what the requirements for the hdmi support are. I have a startech hdmi to usb c adapter but it doesn't seem to work.

Has anyone else been able to connect to hdmi? Is the planet hdmi adapter proprietary?

I've tried both USB c ports.
Yes,  it is proprietary. Third party adapters are unlikely to work (never heard a success with Gemini or Cosmo). Displaylink should work, alternatively.

Elevennails

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« Reply #4 on: January 20, 2020, 06:14:34 pm »
Quote from: mithrandir
Quote from: Elevennails
All is good so far I'm now working on the 20200117_1823.

I'm wondering what the requirements for the hdmi support are. I have a startech hdmi to usb c adapter but it doesn't seem to work.

Has anyone else been able to connect to hdmi? Is the planet hdmi adapter proprietary?

I've tried both USB c ports.
Yes,  it is proprietary. Third party adapters are unlikely to work (never heard a success with Gemini or Cosmo). Displaylink should work, alternatively.


Do you think that will also be the case under debian. I know Samsung galaxy note 10 works with the starhdmi to usbc cable I have. So it sounds like its just a driver issue.

spook

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« Reply #5 on: January 21, 2020, 11:27:12 pm »
I think it's a hardware thing. From what I have read, the PC HDMI adaptor is wired specifically and will only work on the Gemini or Cosmo. Conversely, any other USB-C-HDMI adaptor doesn't seem to work. The only reason the DisplyLink adaptors work is because they actually have a small graphics chip inside them - so they don't rely on the host computer to send a display signal (AFAIK).