My Surface Pro 9 has 2 USB-C ports with Thunderbolt 4.
So as to run 2 HDMI displays from it I thought it would be simplest to
buy a HDMI splitter cable from eBay.
The one to two option didn't work, nor the one to one.
It might be that there are splitters that work, possibly more
expensive ones.
Anyway, I have two UGreen hubs. They each have a single HDMI socket.
I plugged them both into the USB-C sockets and ran a HDMI cable from
each to each monitor. Only one monitor came live.
Is this a more likely to be a config problem or hardware limitations?
My Surface Pro 9 has 2 USB-C ports with Thunderbolt 4.
So as to run 2 HDMI displays from it I thought it would be simplest to
buy a HDMI splitter cable from eBay.
The one to two option didn't work, nor the one to one.
It might be that there are splitters that work, possibly more
expensive ones.
Anyway, I have two UGreen hubs. They each have a single HDMI socket.
I plugged them both into the USB-C sockets and ran a HDMI cable from
each to each monitor. Only one monitor came live.
Is this a more likely to be a config problem or hardware limitations?
My Surface Pro 9 has 2 USB-C ports with Thunderbolt 4.
On 29/09/2023 in message <7s5dhi5qkh879sjm361u1ln6ijho4fc1eb@4ax.com> Mike >Halmarack wrote:
My Surface Pro 9 has 2 USB-C ports with Thunderbolt 4.
So as to run 2 HDMI displays from it I thought it would be simplest to
buy a HDMI splitter cable from eBay.
The one to two option didn't work, nor the one to one.
It might be that there are splitters that work, possibly more
expensive ones.
Anyway, I have two UGreen hubs. They each have a single HDMI socket.
I plugged them both into the USB-C sockets and ran a HDMI cable from
each to each monitor. Only one monitor came live.
Is this a more likely to be a config problem or hardware limitations?
Just to clarify are you trying to run 2 external monitors from 1 x >Thunderbolt port?
Do you still want the display on the laptop as well?
Spent the last 2 days hanging upside down behind my monitors trying to >convert signals, at one stage I convinced myself the signal ran FROM the >monitor TO the computer :-(
Mike Halmarack <mikehalmarack@gmail.com> wrote:
My Surface Pro 9 has 2 USB-C ports with Thunderbolt 4.
So as to run 2 HDMI displays from it I thought it would be simplest to
buy a HDMI splitter cable from eBay.
The one to two option didn't work, nor the one to one.
It might be that there are splitters that work, possibly more
expensive ones.
Anyway, I have two UGreen hubs. They each have a single HDMI socket.
I plugged them both into the USB-C sockets and ran a HDMI cable from
each to each monitor. Only one monitor came live.
Is this a more likely to be a config problem or hardware limitations?
You can't 'split' HDMI. You need the machine to generate two HDMI outputs >(in reality Displayport plus a DP->HDMI conversion). It appears Microsoft >reckons it can output to two monitors: >https://support.microsoft.com/en-us/surface/troubleshoot-connecting-surface-to-an-external-display-bc8f5121-a4cb-cf0b-5770-2df7a66a3b28#bkmk_changesupportedresolution_w11
but that's mostly about the Surface Dock.
It's possible the second display is only accessible from a Thunderbolt dock >rather than USB. You'd need to dig into how to do it with that specific >machine.
I think the original Surface Dock is pure USB though, so it sounds like it's >possible to do it with USB alone.
You could try switching around the Ugreen hubs. Try one in one port, then >move it to the second port. Each time later add a second hub to the other >port. It might give some clues as to what works.
Also, drive the monitors to something easy like 1080p, so you're not running >into bandwidth limitations.
Theo
Andy Burns wrote:
CalDigit TS4 dock [...] not cheap, but it sure is good.
It stikes me that Thunderbolt can be a costly upgrade.
Mike Halmarack wrote:
My Surface Pro 9 has 2 USB-C ports with Thunderbolt 4.
I have a Lenovo with dual Thunderbolt4 ports
One port is hooked to a CalDigit TS4 dock and from there to a 4K DP
monitor and a WQXGA DP-altmode monitor (plus other stuff)
That dock's not cheap, but it sure is good.
Thanks so much for the variety of advice. I was sufficiently scared
off the super expensive hubs, just to get my dual monitor display
functioning again So I took the simplest option offered and just
swapped and jiggled the two relatively cheap UGreen hubs around in
various configurations and both monitors sprang into life.
So one hub in each USB-C socket and one HDMI cable to each hub worked
in the end after much shuffling.
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