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April 24th, 2025 20:15

U3225QE, losing LAN after connecting daisy chain

Hi! I lose the 2.5GB Ethernet. Change to 300MB max after Daisy Chain two monitor daisy chain using DisplayPort IN/OUT Connectors. Already change the DP assign to Thunderbolt 140W in the monitor menu and the same happened. Any idea how to resolve?

Community Manager

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56.8K Posts

April 25th, 2025 11:25

Dell Support must verify the ownership and warranty status. Click the blue "Get Help Now" on the right to start a private live chat session. Share the private monitor Service Tags with them.

Two U3225QE in a daisy chain. The Ethernet cable should be connected to the first primary U3225QE RJ45 port.

1 Rookie

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1 Message

May 15th, 2025 08:41

I encounter the same problem. 

Test #1: Connect just the primary monitor
Status: LAN Works

Test #2: Connect just the primary monitor, then connect the second monitor to the laptop directly
Status: LAN Works

Test #3: Connect just the primary monitor, after connection, daisy-chain it
Status: LAN Works

Test #4: Daisy chain it first then connect the primary monitor to the macbook
Status: LAN does not work

In all cases, the ethernet cable is connected to the primary monitor.

1 Rookie

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2 Posts

May 15th, 2025 13:06

Hi Rookie i should return two of the same serie for that issue, i chat Dell over 2 hours and they didn't have a solution like a firmware or whatever else, i should return them U2725QE and U3225QE for that exactly reason, it's a shame because there was two excellent displays talking about image and colors.

Community Manager

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56.8K Posts

May 28th, 2025 11:06

@darwin013​ What MacBook model? What macOS version number?

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