cancel
Showing results for 
Search instead for 
Did you mean: 
  • ×
    Information
    Need Windows 11 help?
    Check documents and videos on compatibility, FAQs, upgrade information and available fixes.Windows 11 Support Center.
  • post a message
  • ×
    Information
    Need Windows 11 help?
    Check documents and videos on compatibility, FAQs, upgrade information and available fixes.Windows 11 Support Center.
  • post a message
The HP Calculator Community Message Board is moving. While we prepare for the move, we are unable to accept new postings. During the move, you can look for help from other users by visiting https://www.hpmuseum.org/ . Or if you need technical support for your calculator visit: HP Calculators. .
Dan8719
Level 2
16 14 1 4
Message 1 of 6
2,407
Flag Post

External monitor not working with thunderbolt connector

HP Recommended
HP Spectre x360 Laptop - 15-eb0017nl
Microsoft Windows 10 (64-bit)

Dear all,

in past months I had a problem with my laptop: HP Spectre x360 Laptop - 15-eb0017nl ( it has 2 thunderbolt ports with type C connector and 1 HDMI connector. Moreover there are 2 graphics cards: an Intel one decidated to the laptop monitor and a Nvidia GeForce for the external monitor). The problem was the following:
when I tried to connect the laptop with the external monitor there was no way to make it working. I tried to connect the external monitor in the following ways (and with different monitors):
- with thunderbolt (usb-c connector) to DisplayPort directly to the monitor

- with thunderbolt (usb-c connector) to HDMI directly to the monitor

- with thunderbolt (usb-c connector) to VGA directly to the monitor

- with DisplayPort to DisplayPort cable connected to the HP Thunderbolt Docking station 120W (6HP48AA) 

- with HDMI to HDMI cable connected to the HP Thunderbolt Docking station 120W (6HP48AA) 

without any success.
The ONLY way to make the external monitor working was to connect it directly through the HDMI connector of the laptop.

 

After several attempts with the HP support trying to update several drivers (related to everything) and reinstall also the Operating System the HP service (after almost 10 iterations and 2 months)  gave me the solution which I want to share with you.

You need to go to the device manager, then Graphic cards, and choose the one related to the external monitor (in my case the NVIDIA one). Right click, properties, details, GUID class, and take note of the code.

Now enter the REGEDIT and enter the following directory: \HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Class\

finally choose the folder with the same name of the code you took note befeore, then choose folder 0002 and set the RMEnablePhyRepeater entry to 1 (in my case it was set to 0). Shut down the laptop and switch it on.

 

This finally fixed the problem.

 

5 REPLIES 5
Mauro71
New member
2 1 0 1
Message 2 of 6
Flag Post
HP Recommended

I had posted the same problem yesterday.

I used the same procedure indicated by you and finally I solved.

The onslu difference is that in my regedit configuration I don't have the folder 0002. The indicated key is in 0000. Do you have any idea about this difference?

I changed this parameter and magically the second screen was displayed.

 

Thank you very much.

 

Mauro

Was this reply helpful? Yes No
Dan8719
Author
Level 2
16 14 1 4
Message 3 of 6
Flag Post
HP Recommended

Dear Mauro71,

actually I have no idea about the meaning of 0000 or 0002 folders and so on, but I'm happy to hear that my post has been useful for someone since I wasted a huge amount of time with HP Support in trying to fix that problem! 

Was this reply helpful? Yes No
Petertherockuk
Level 1
6 4 0 0
Message 4 of 6
Flag Post
HP Recommended

So sad. I don't have the file RMEnablePhyRepeater. 

 

I am having the same problem as everyone. New Dell monitor purchased however no signal in the usb c on the monitor from the hp spectre laptop, the laptop is charging though.

 

 

Was this reply helpful? Yes No
Jonas_81
New member
2 2 0 0
Message 5 of 6
Flag Post
HP Recommended

Thank you so much for posting this information! This problem was driving me completely mad, and your solution solved it.

( I registered on HP now just to say thanks to you )

Was this reply helpful? Yes No
Jonas_81
New member
2 2 0 0
Message 6 of 6
Flag Post
HP Recommended

I did not have the entry RMEnablePhyRepeater either. I added it (DWORD) and set it to 1.

I had no high hopes doing this - but the screen turned on 🙂

 

The "Device was not migrated due to partial or ambiguous match" and black screen was driving me crazy.

( I did another thing, that perhaps was needed, perhaps not - I started the Thunderbolt Software and enabled the Screen there, before I tried this. But that only enabled all the USB jacks)

This was on a (Spectre x360, thunderbolt 3 port), connected to a an LG UltraFine 5k screen (Bought to work with my Mac).

Was this reply helpful? Yes No
Warning Be alert for scammers posting fake support phone numbers and/or email addresses on the community. If you think you have received a fake HP Support message, please report it to us by clicking on "Flag Post".
† The opinions expressed above are the personal opinions of the authors, not of HP. By using this site, you accept the Terms of Use and Rules of Participation