New Dell U2725QE

[timmah339]

I use TB daisy-chaining (not DisplayPort MST) with an M3 Pro Mac and haven’t had any issues since I updated the firmware to M2T102, which addresses many of the issues you’re having:

1. Resolve monitor wake-from-sleep issues.
2. Address USB speed reduction to 480Mbps on MacBook.
3. Enhance accuracy of Auto Color Temperature sensing.
4. Correct Auto Brightness sensing errors.
5. To resolve the issue where daisy-chained monitors do not wake from system standby.

Here’s the link to the support page: https://www.dell.com/support/product-details/en-us/product/u2725qe-monitor/drivers.

Note that the readme ambiguously states you must use the "USB-C upstream port" to perform the update. Connect your computer directly to the Thunderbolt host (upstream) port instead.

 

[BLtheP]

I use TB daisy-chaining (not DisplayPort MST) with an M3 Pro Mac and haven’t had any issues since I updated the firmware to M2T102, which addresses many of the issues you’re having:

Here’s the link to the support page: https://www.dell.com/support/product-details/en-us/product/u2725qe-monitor/drivers.

Note that the readme incorrectly states you must use the USB type-c upstream port to perform the update. Connect your computer directly to the Thunderbolt host port instead.

Interesting, I assumed DDM would keep the monitors updated automatically, but I need to check on that when I'm back at the office tomorrow. Thanks for the tip!

 

[PaulD-UK]

@timmah339
"Note that the readme incorrectly states you must use the USB type-c upstream port to perform the update.
Connect your computer directly to the Thunderbolt host port instead."

A Thunderbolt monitor is not a Host device. The Mac is the Host (controller) device, and sends data to the external peripheral devices, including a monitor.

The 'Upstream' port of a peripheral is the one where the incoming data stream arrives from the computer.
On a monitor that is the port where you plug in the cable from the computer.

A Thunderbolt monitor can also have a 'Downstream' USB-C (TB data-out)) port to connect to a daisy-chained second monitor.

For doing a firmware update you would plug in your Mac's monitor output cable into the (normal) Upstream port.
Is that not what the ReadMe says?

 

[timmah339]

A Thunderbolt monitor is not a Host device. The Mac is the Host (controller) device, and sends data to the external peripheral devices, including a monitor.

I fully understand this, was just lazily phrasing "port that connects to the host." I'll use the formal upstream term below to avoid any confusion.

For doing a firmware update you would plug in your Mac's monitor output cable into the (normal) Upstream port.
Is that not what the ReadMe says?

The pdf guide that ships with the update tool was written for a much older monitor and ambiguously states "The USB upstream cable needs to be connected between the monitor and your computer.":

I (incorrectly) thought they meant the USB-C upstream port after quickly skimming the guide. One must use the Thunderbolt 4 upstream (Video + Data) port as specified in the user manual:

Weirdly, the update tool and monitor both attempt the update when connected to the USB-C upstream port, but fail after some time and send the monitor into some kind of semi-functional recovery mode.

 

[BLtheP]

Both of my monitors are on M2T102 already....and again the issue happened this morning. So irritating. I am getting close to ordering something else.