LAN port gets link but no identified network anymore

[TommyM74]

Hello,

Very strange issue:

When connecting the CAT cable to LAN port on my ProBook it gets a link (on a router port which I use several months already) but after trying to identify the network for a while it says "no identified network" and switches to WiFi.

This is my office network which it worked before for years, and yes... I tried ALL solutions available I found in the internet (driver update, re-installing, Windows troubleshooters, even a fallback to an earlier Windows state).

The same behavior has been identified at two locations, two different networks...

Strange thing is that if the LAN port/chip would be broken, I assume that it won't work at all, but as it gets a link and is available in the device manager (there everything is OK) I am really confused and don't know where to go on.

Would be great to get any hint I can build on.

Thanks a lot for your support!

Thomas

[ub6424]

Hello @TommyM74 

Sorry to hear that you are having problems ... I would like to help you.

Let me check your current system configuration.

(1) Run    msinfo32

- Select <System Summary>:

--->>> Copy/screenshot/paste following key/value pairs:

OS Name

Version

System Model

System SKU ( equals HP product number (p/n) )

Processor

BIOS Version/Date

(2) Start Windows <Device Manager>

- Expand <Network adapters>

--->>> Send screenshot

(3) Please report your results

[TommyM74]

Hello @Ub6424,

Thanks a lot for your response, find the requested information:

Problem is with Realtek PCIe Gigabit Adapter... but it shows everything as  OK

[ub6424]

Hello @TommyM74 

(1) Create Windows system <restore point>

How to Create a System Restore Point on Windows 10 or Windows 11

(2) Download and install BIOS Update

HP Firmware Pack

01.21.01 Rev.A

12.6 MB

Aug 15, 2022

Download

Why should you install the update ?

https://support.hp.com/us-en/document/ish_4123786-2338478-16

Quote: "

Updating the BIOS is recommended as standard maintenance of the computer. It can also help resolve the following issues:

• An available BIOS update resolves a specific issue or improves computer performance.
• The current BIOS does not support a hardware component or a Windows upgrade.
• HP Support recommends installing a specific BIOS update.

"

(3) Reboot

(4) Let BIOS be installed until it's completely done !

(5) Download and install / update

Intel Chipset Installation Utility

10.1.18243.8188 Rev.S

3.0 MB

Jan 3, 2020

Download

Intel Management Engine Driver

2205.15.0.2623 Rev.W

272.4 MB

Apr 18, 2022

Download

Intel Serial IO Driver

30.100.1914.3 Rev.A

2.8 MB

Jun 10, 2019

Download

(6) Restart Windows

(7) Download and install / update

Realtek Ethernet Controller Drivers

10.45.928.2020 Rev.P

0.8 MB

Mar 3, 2021

Download

(8) Restart Windows

(9) Reset Windows 11 Network

How to Reset Network Settings in Windows 11

(10) Restart Windows and test network connection

(11) Please report your results

[TommyM74]

Hello,

Did the firmware update:

- installed all the recommended updates

- did a network reset, everything went fine

- after reboot: problem still exists. When I turn off WiFi, not switching to LAN as of unidentified network.

When deactivating the adapter and activating it again it takes about a minute until it shows unidentified network.

[ub6424]

Hello @TommyM74 

(1) Download and install / update

--->>> Realtek PCIe FE / GBE / 2.5G / Gaming Ethernet Family Controller Software

(2) Restart Windows

(3) Test LAN connection

(4) Please report your results

[TommyM74]

did the Realtek driver installation

chose repair of drivers

tool was installing/updating all drivers

restart Windows

shortly after login it was displaying the LAN network symbol in the right corner... but as soon as I was realizing it and thinking the issue has been solved, it switched to WiFi again 😞

WiFi network is being identified in few seconds with success, LAN is not

[ub6424]

Hello @TommyM74 

Check the following:
- Is DHCP or static IP used ?
- Check or replace the LAN cable
- Check the LAN socket (Notebook and Network Switch)

- Check if you can get a connection with a USB-to-LAN adapter (or another computer) using the same LAN cable

Kind regards

[TommyM74]

Hello @Ub6424,

- DHCP is used, tried also to set static IP, no change

- as said, same behavior on different locations/network, anyway, changed the cable, same same... definitely no cable issue

- see above, tried it on two different sites with different networks, exactly the same (both have worked before without any problem)

- hmmm, no adapter available, but I will order one...

HP network assistant also tells me that everything is fine.

So I really think it is not a hardware issue, as also device manager tells that everything is OK, but some kind of Windows/HP bug. It really started from one day to the other, without doing critical things on the setup (besides the normal Windows update procedures).

BTW: Thanks a lot for your support, I really appreciate!

[ub6424]

Hello @TommyM74 

Check whether you can establish a network connection with an Live Linux distribution on this notebook.

Kind regards