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U2722DE, two U2722D, daisy chain blinking issue
Hi
I have U2722DE and two U2722D connected in daisy chain after that over DP (DisplayPort).
There is strange ongoing issue where the two monitors lose picture for a second or two and gets the signal back again from the source U2722DE monitor. It happens randomly and it doesn't seem to be software or driver, because sometimes there is like AC power glitch on the two monitors.
Both monitors blink after temporary signal loss from the U2722DE monitor. At some point it does that several times over and over. And sometimes it doesn't do it for like 1 day.
I have tried replacing the DP cables with DP 1.4 certified for like 8K resolution, same issue continues.
CPU and motherboard I am using are =
AMD Ryzen 7 pro 5750G
Gigabyte B550i AORUS Pro AX
Thanks
DELL-Chris M
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May 16th, 2023 05:00
To receive assistance from Dell Chat support, they need to verify the warranty status and ownership. Then you must troubleshoot with them. Click the "Get help now" icon on the right to start a live private chat session. Provide to them all three private Service Tags.
What GPU/video card is installed on that desktop motherboard?
Am I correct in that you are trying to daisy chain two U2722D from the primary U2722DE? Meaning the single GPU/video card DP out port is driving three monitors at 2560x1440 60Hz?
PC GPU/video card DP out port --> DP to DP cable --> U2722DE #4 DP in port (Menu- Display- MST On)
U2722DE #6 DP out port --> DP to DP cable --> First U2722D #4 DP in port (Menu- Display- MST On)
First U2722D #5 DP out port --> DP to DP cable --> Second U2722D #4 DP in port (Menu- Display- MST Off)
kamenov
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May 25th, 2023 15:00
Hey
this is the exact configuration, there is no dedicated GPU, that CPU has internal GPU in it(APU).. any possible reasons why this is happening?
DELL-Chris M
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May 26th, 2023 04:00
In Windows Display settings, do all three monitors show as using 2560x1440 60Hz?
List every video out port on that motherboard.
kamenov
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July 25th, 2023 03:00
yes 4 monitors are @ 2560x1440 60Hz
display outputs on the motherboard are:
1 x DisplayPort
2 x HDMI ports
any other ideas? it is super odd blinking randomly, it is like renegotiating display port signal from time to time, can't catch when exactly.. I am starting to think one of the monitors has electrical issue of some sort.. and I have to say D monitor variants do it more frequently then DE variant monitor
DELL-Chris M
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Community Manager
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55.2K Posts
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July 25th, 2023 08:00
4 monitors? I thought we were working with 3 monitors =
U2722DE
U2722D
U2722D
Since the PC has three video out ports, why not forget daisy chain and connect all three monitors like this =
PC DP --> U2722DE DP to DP cable --> U2722DE DP in port
PC USB-A port --> U2722DE USB-A to USB-C cable --> U2722DE USB-C upstream port
PC HDMI --> retail HDMI to HDMI cable --> 1st U2722D HDMI in port
PC HDMI --> retail HDMI to HDMI cable --> 2nd U2722D HDMI in port