iPad iPad Pro M1 won't output 4K over USB-C - HDMI

[alexjholland]

Hey, I've got an iPad Pro 11-inch M1 and a 27" 4K monitor.

When I connect via this USB-C to HDMI cable it appears to be in 1080p (or similar) - grainy.

But when I connect via the official Apple AV dock it's clearly in 4K - detailed.

Why is this?

Obviously, it's more elegant to use a single, white USB-C cable at my desk.

Thanks

 

[jaytv111]

I think you have a DP 1.2 cable (internally, externally it's HDMI but internally it uses DP protocol, only certified for 1.2). So you get downgraded with the iPad and some Macs.

You need a cable with DP 1.4 version, hard to know unfortunately unless you have a cable tester or the manufacturer says so.

 

[JPack]

Maybe try the firmware update?

USB-C to HDMI Cable - 4K Ready

Cable Matters USB Type-C to HDMI Cable is specifically designed to connect new release thin computers and some smartphones to a UHD TV, 4K monitor, or projector with HDMI.

www.cablematters.com

 

[alexjholland]

I think you have a DP 1.2 cable (internally, externally it's HDMI but internally it uses DP protocol, only certified for 1.2). So you get downgraded with the iPad and some Macs.

You need a cable with DP 1.4 version, hard to know unfortunately unless you have a cable tester or the manufacturer says so.

Thanks for the tip - CableMatters confirmed that it's only DP 1.2.

I don't get how they can advertise this as a 4K cable?

 

[sparksd]

Thanks for the tip - CableMatters confirmed that it's only DP 1.2.

I don't get how they can advertise this as a 4K cable?

DP 1.2 supports 4K -

https://www.electronicshub.org/displayport-1-2-vs-1-4/

I use their DP 1.4 cable with my M1 12.9 & LG 4K monitor -

https://www.amazon.com/gp/product/B01J6DT070

 

[jaytv111]

Thanks for the tip - CableMatters confirmed that it's only DP 1.2.

I don't get how they can advertise this as a 4K cable?

4K with the right kind of GPU, the iPad and M1 Macs don’t have it and need 1.4.