Ethernet wired connection keeps disconnecting

Question

I have Dell XPS 13 7390 and Dell Thunderbolt Dock- WD19TB  but when I connect an ethernet cable to the dock or to the laptop it will disconnect from the internet for a few seconds and reconnect regularly.  WiFi works ok.  I have used different cables and still disconnects.  Dell has replaced my docking station twice.  Dell has replaced the motherboard.   The router has been replaced.  I have replaced the router Dell has updated all of the drivers.  I saw this on a different thread in the Dell Community which said to do the following - I have disabled Energy Efficient ethernet and green ethernet and wake on Magic Packet I have tried the ethernet with a different computer and it works fine.

Tesla1856 · Accepted Answer

@Eddielarue wrote:

I am having a similar issue XPS 17 9720. Using a Dell 7-in-1 USB-C Multiport Adapter - DA310 to connect to Ethernet in office. The network drops up to 10 times a day. No other computers on Windows 11, or having the issue.

1. I connect to another computer hosting our QB's file, and when it drops, I have to go in and shut down all the other QB programs to relaunch QB.

2. I have turned off Wi-Fi, and disabled the adapter settings noted earlier in the post.

1. What a mess. That QuickBooks file sharing is already a bit rickety, and then it sounds like this is just peer-to-peer Windows Networking. A machine with a poor ethernet connection is the last thing you need.

For sure, keep that QB-file backed up (made the proper way as a company-file.QBB )

2. Good

Try this:

In Control-Panel / Programs and Features
and/or
Settings / Apps / Apps & Features
Properly uninstall anything related to:
- Intel Killer Performance Suite (Performance Killer)
- Killer Networking (Rivet, xTend, etc.) Killer of Networking
- Dell Optimizer (Network de-Optimizer)
- Express-Connect
- SmartByte

In Control Panel / Device=Manager
- Delete the Wireless-WiFi device
Reboot computer..

On next start, Windows should auto-detect the WiFi mini-card and load appropriate (nice lean/basic/fast) drivers. Basically, run the simple Windows drivers (not that Killer nonsense).

Repeat process for Wired Ethernet device.

Test operation.

AdrianG001 · Answer

For Windows 10:

Go to Device Manager

Expand the Network Adapters drop-down

Right-click on your ethernet port/device (mine is called Realtek USB GbE Family Controller)

Choose Properties and go to the Advanced tab

Select the Speed & Duplex property and change the value from "Auto Negotiation" to 100 Mbps Half Duplex

That worked for me and gives your data exchange a hard rule instead of allowing it to constantly calibrate itself.

Hope this helps.

Truth21 · Answer

thank you, but it still doesn't work.  very frustrating, especially when I have tried different laptops and they work.

Eddielarue · Answer

I am having a similar issue XPS 17 9720. Using a Dell 7-in-1 USB-C Multiport Adapter - DA310 to connect to Ethernet in office. The network drops up to 10 times a day. No other computers on Windows 11, or having the issue. I have turned off Wi-Fi, and disabled the adapter settings noted earlier in the post.

I connect to another computer hosting our QB's file, and when it drops, I have to go in and shut down all the other QB programs to relaunch QB.

Tesla1856 · Answer

@Truth21 wrote:

Dell XPS 13 7390

1. or to the laptop

2. I have used different cables and still disconnects.

3. Dell has replaced my docking station twice. Dell has replaced the motherboard.

4. The router has been replaced. I have replaced the router

5. I have tried the ethernet with a different computer and it works fine.

1. Why use Dock's port if it has an on-board RJ-45 ethernet port for direct-connect?

2. What kind and how long. Try some new high-quality 6-ft CAT-6 ones.

3. Yikes

4. Wow

5. Is the "other computer" Gigabit (1000 speed) also ?

What kind of cable is in the wall?

How long is that cable run ?

Have you replaced the wall-jack?

Is there an ethernet switch (like a multi-port box) on either end?

Sparky 101 · Answer

This did it for me. I bought an XPS13 in March having been a Lenovo user for years,and much as I love it when it works properly I vowed never to buy another Dell because of the wired network dropouts. Not (usually) as bad as some on here, but often enough, then going through the uninstall/reinstall palarver. I even put a shortcut to Device Manager on my desktop. I tried loads of things and sometimes they seemed to work for maybe nearly a whole day before crapping out again. Three days ago I saw AdrianG001's solution, went into Device Manager (easy, I had a shortcut) and set Speed & Duplex to 1 Gbps Full Duplex to match the network and I've been dropout free for a whole three days so far. Of course do all the driver stuff and DA310 etc stuff anyway, but set Speed & Duplex for your application.

G33K4YC33 · Answer

This did it for me, thanks @AdrianG001 Sometimes it's the simple things!

HarryBin · Answer

I had the same issues with my XPS 15 9530. The disconnection issue was successfully reproducable by doing video calls. As soon as I turned on my own video the disconnection came after 1 or 2 minutes.
For me the combination of @Tesla1856 and @AdrianG001 solved the problem.
First uninstall all the network interferring software and network driver (like @Tesla1856 described), reboot.
Then for the new clean driver set the adapter to 1GB-Full-Duplex (like @AdrianG001 said), reboot again.

Done.

Inspiron

Was this post helpful?