I have dual 4K Samsung U32R59 models
I have a Hyperdrive VIPER 10-in-2 USB-C Hub with 2 x HDMI adapters
My main screen is nice and bright as I expect
The second screen is much dimmer - like yellowish instead of white and all colours dimmer
Tried all adjustments on screen, swapped screens and cables
But the one you setup as the second screen is dimmer
Both however is full 4K
Any ideas of how to resolve
To fully support TWO hardware-accelerated displays on one cable to your Mac, the first device (Display or Dock) MUST be a genuine ThunderBolt device and connect with a genuine ThunderBolt cable.
The Mac does not fully support two hardware-accelerated displays on a USB Dock, unless it connects with TWO USB cables.
¿WHAT model MacBook Pro, exactly?
menu > about this Mac
To fully support TWO hardware-accelerated displays on one cable to your Mac, the first device (Display or Dock) MUST be a genuine ThunderBolt device and connect with a genuine ThunderBolt cable.
The Mac does not fully support two hardware-accelerated displays on a USB Dock, unless it connects with TWO USB cables.
¿WHAT model MacBook Pro, exactly?
menu > about this Mac
Hi BobTheFisherman
Nope what i see on youtube and read on google is it supports 1 x 8k or 2 x 4k external monitors
I do have a USBC hub that gives more ports - including 2 x HDMI
The monitors all work and i can setup to mirror or be external on either and i can display different views on Mac screen two 4K displays
iI did read a couple of posts on various groups that the second 4K screen is dimmer
But on the Mac onboard HDMI port all is fine
So regardless of which port you use, the second 4K display is dimmer
I am waiting for the new Docking Station Caldigit TS4
From what i saw on youtube itbis all ok with dual 4K displays
Grant
It is a new Macbook Pro 16”, 2021 model
Only got it two weeks ago
The Dock I have is a Hyperdrive VIPER 10-in-2 USB-C Hub
It does use a double USBC plug into the Mac
Spec on their Website is as follow
Ports
2 x HDMI 4K60Hz
3 x USB-A 5Gbps
Gigabit Ethernet
SD UHS-I 104MB/s
MicroSD UHS-I 104MB/s
USB-C PD (Power Delivery) 60W
3.5mm Audio Jack
I think the issue is maybe the USB-A 5gb is the problem
Definately the Caldigit TS4 evaluations does not point this as an issue
Same Mac Pro and same 4K screens but different USB ports - they are Thunderbolt 4 ports
Sorry. When I read the specs for the M1 I only see support for one external display.
MacBook Pro 14- and 16-inch - Technical Specifications - Apple
The M1 Pro and M1 Max support additional external displays.
Actually I read the spec wrong
I really have no reason to say that is the problem
The ports I referred to was the ones on the dock, and that has no effect on the HDMI ports
For a moment I though that was the ports on the Mac
So I really have no idea what the cause of this dimming of second screen is
Still think the Caldigit TS4 will be my solution
Just wasted 229$
If I understand you correctly, you are attaching two external displays. The MacBook Pro M1 only supports one external display.
<< I think the issue is maybe the USB-A 5gb is the problem >>
How did you decide that?
Dual 4k monitors on mac pro 2021 (M1 CPU)
