U2723QE, black screen when switching inputs, #2

I also got the same problem. software freeze and I need to unplug power cable.

I am having the same problem.

I have the same issue, but even without switching inputs. It seems like if I let this display go to sleep while I have another screen connected to my macbook, it's software crashes and yanking the power cord is the only way to get it to come back to life.

I haven't seen it occur when it's the only display connected, but I've been using it less than 24 hours and have had it freeze twice when connected at the same time as another LG screen. Nothing on the other end of the cable should be capable of making the screen's own buttons stop working. Pretty shoddy.

To refresh the topic I decided to add some additional information.
1. On all computers I have installed the Dell Display manager application
2. I have installed all drivers for monitors and color profiles
3. Firmware version: M2T101 - on the both monitors
4. DDC/CI is on
Because I am not alone with this problem from few months I hope that someone finally solve this issue because it starts getting annoying and frustrating.

I'm seeing a similar problem here. M1 MacBook Pro connected to a CalDigit TS3+, which in turn is connected to the U2723QE over USB-C and a P2415Q over DisplayPort. The U2723QE doesn't wake from sleep at times and won't recover unless the power is cycled. My spouse has a similar setup with a U2723QE and is observing the same problem on a Windows PC and M1 MacBook Pro.

One more information - which I forgot to write from the beginning of this topic. On Windows computers I have an error like in the screenshot (s/n is removed). Of course OSD does not work as I mentioned, cables does not matter. Same error appears for both my monitors, difference is only in s/n.

I am having the same issue.

Anyone got the solution? Looking for someone form Dell 

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I'm quite sure its decide problem so no solution would be provide.

Alone with the HDR flicker problem

the issue occurred again 2 times yesterday, I have 2 U2723QE, one usb-c to DP, another usb-c to usb-c, both are having this issues.

I have the exact same problem as many others and the behavior is 100% reproducible.

 RCBANANA,

Following up to see if you were able to update and resolve the issue? 

Having the same issue here as well, has persisted since I purchased the display a month ago.

Connections:

• Daisy-chained DP monitor is a Dell U2412M, connection is made using the DP cable provided with the U2327QE.
• KVM is used, with a wired MS USB keyboard and PS/2 to USB adapter for a wired trackball
• USB-C 90W is connected to a HP Elitebook 850 G8. Realtek GbE Ethernet is used instead of WiFi for this laptop.
• DP is connected via "8K" DP cable to a Hades Canyon NUC Mini-DP out + USB-A to USB-C for the side channel connection. The NUC has the Realtek USB GbE driver disabled as it uses the 2 onboard Ethernet controllers to create a bonded link with a wired switch.
• Dell Display Manager was tried on all systems, along with the latest monitor drivers for both primary and secondary displays.

Symptoms:

Any time the laptop is connected, even if slept but probably "charging", the NUC's DP will not wake the display. Usually, this happens after the HP has been driving the screens and KVM over USB-C, so it's unclear if I can "move the mouse" or "push a key" to send a wake signal to the NUC if it's decided to sleep due to inactivity. When I go to use the NUC, I will usually unplug the HP first before powering the NUC on.  9/10 times the result is usually:

• The U2327QE and U2412M screens remains blank
• The U2327QE power LED is solidly illuminated
• The U2327QE power button has no effect (short push or long hold push hoping for a power cycle like a PC)
• The U2327QE joystick press or movement has no effect (no on-screen menu displayed)
• It takes removal of physical power to the U2723QE to clear the condition, via removing and plugging the power cable back in

This smells of firmware + lack of a hardware watchdog to pet occasionally, leading to a soft hang or deadlock.