MP 7,1 AMD W5700x HDMI, usb-c issue

[Gr1f]

Hi Folks,
I was using a USB-C to DVI Adapter for my Samsung SA850 which 'works' until I restart. Then I have to unplug/plug the cable to get it to display anything. Fine on sleep etc. Just a restart is the issue.

So I ordered a HDMI - DisplayPort cable: Up to 4K@30Hz backward compatible with 1440P@60hz, 1080P@120hz, etc thinking this would resolve the restart issue. Seems not. Doesn't display anything at all. Monitor doesn't detect a connection.

Any ideas?

Cheers

 

[tsialex]

Hi Folks,
I was using a USB-C to DVI Adapter for my Samsung SA850 which 'works' until I restart. Then I have to unplug/plug the cable to get it to display anything. Fine on sleep etc. Just a restart is the issue.

So I ordered a HDMI - DisplayPort cable: Up to 4K@30Hz backward compatible with 1440P@60hz, 1080P@120hz, etc thinking this would resolve the restart issue. Seems not. Doesn't display anything at all. Monitor doesn't detect a connection.

Any ideas?

Cheers

DisplayPort can be converted to HDMI, but HDMI can't be converted to DP without an active adapter and a lot of times don't work. People tested several HDMI to DP active adapters with 2019 Mac Pro and AFAIK no one worked.

How you are using it?

 

[flowrider]

Any ideas?

FOINNEX HDMI to DisplayPort Adapter, 4K@60Hz Not-Bidirectional HDMI to Display Port, Unidirectional HDMI Source to DP Display Male to Female for Computer, Monitor, PS4, NS

FOINNEX HDMI to DisplayPort Adapter, 4K@60Hz Not-Bidirectional HDMI to Display Port, Unidirectional HDMI Source to DP Display Male to Female for Computer, Monitor, PS4, NS

www.amazon.com

This one worked for me.

Lou

 

[Gr1f]

OK thanks. I tried it from my MBP via a hub and it didn't work either. So I'm guessing cable issue

 

[Gr1f]

DisplayPort can be converted to HDMI, but HDMI can't be converted to DP without an active adapter and a lot of times don't work. People tested several HDMI to DP active adapters with 2019 Mac Pro and AFAIK no one worked.

How you are using it?

With the cable - HDMI port on 5700 plugged into Displayport on the monitor. Doesn't work
With the adapter, USB-C on 5700 then DVI cable to DVI on monitor. Does work but need to unplug/plug after restart

I would have never guessed HDMI to DP doesn't work....

 

[joevt]

OK thanks. I tried it from my MBP via a hub and it didn't work either. So I'm guessing cable issue

You are replying to flowrider about the HDMI to DisplayPort Adapter? A similar adapter is the Club 3D CAC-1331

 

[joevt]

With the cable - HDMI port on 5700 plugged into Displayport on the monitor. Doesn't work

I would have never guessed HDMI to DP doesn't work....

It works with the proper adapter.

DisplayPort to HDMI cables do not work as HDMI (source) to DisplayPort (display) unless that is specifically mentioned in the product description (in which case the cable does not work as DisplayPort source to HDMI display).

There are only a small number of display cables/adapters that are bidirectional:
- Mini DisplayPort to/from DisplayPort (because both sides are DisplayPort - same signal but different port shape).
- single link DVI to/from HDMI (not dual link DVI; same signal but different port shape).
- USB-C to/from DisplayPort (only those adapters marked as bidirectional are bidirectional).

 

[Gr1f]

Got this

uni USB C to DisplayPort Cable (4K@60Hz, 2K@165Hz), Sturdy Aluminum USB Type C Thunderbolt 3/4 to DP Cable Compatible for iPhone 15 Pro Max, MacBook Pro/Air, iPad Pro, iMac, XPS, S23 etc. 1.8m

📌Important Note 1: Please ensure that your device's USB-C port supports video output function "DP Alt Mode". Thunderbolt 4/3 output ports are also compatible. 📌Important Note 2: Unidirectional transmission: It can only transmit from the USB-C port to the DP interface. 📌Important Note 3: The final...

www.amazon.co.uk

Works perfectly. Thanks all!