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eDP Problem, CMB1ABA with BKCM11EBI38W

Graw
Beginner
482 Views

Hello,

 

we are using the Intel Rugged board element CMB1ABA with the Compute Module BKCM11EBI38W.

 

We build an All in One PC with these components and using the eDP interface.

We have the poblem, that our display is flickering sometimes and the last option is, that the driver or the Intel board is the reason.

When we start the PC with Windows 10 Professional mostly the display starts to flicker. Sometimes when we start it, it is working stable. When it is flickering it doesn't stop while I restart the system.

 

Is there a known issue at the eDP interface?

Any idea why this flickering occurs?

 

 

edit:

an second strange behaviour is, that the CMB1ABA with the Compute Module BKCM11EBI38W should have a wide input range from 12 Volt to 24 Volt.

This ist working, but the eDP Interface is only working in the range of 12 Volt to 19 Volt.

When the voltage is higher than 19 Volt the display is turning off.

 

 

Kind rgards

Graw

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8 Replies
Jean_Intel
Moderator
462 Views

Hello Graw,


Thank you for posting on the Intel️® communities. I am sorry to hear that you are experiencing issues setting up your Intel® NUC,


For this type of issue, it is always important to make sure the following:


  • Check if you have the latest BIOS version. For the Intel® NUC 11 Compute Element CM11EBi38W, our latest BIOS version is the 0070 version. For the steps on how to update the BIOS you should take a look at this article, there are multiple options, choose the one you are more comfortable with.


  • Update the Thunderbolt driver to the latest version. Our latest Thunderbolt™ 3 and 4 DCH Driver for Windows® 10 for Intel® NUC is the 1.41.1193.0.


  • Set BIOS defaults on the Intel NUC:
    • Press F2 during boot to enter BIOS Setup.
    • Press F9 to load default settings.
    • Press F10 to save and exit BIOS.


  • Check the cabling connection setup :
    • Intel NUC to eGPU via Thunderbolt cable.
    • eGPU to Monitor Display via HMDI or DisplayPort cable.
    • Don't use a dongle or video adapter if possible; use a straight HDMI-to-HDMI cable or DisplayPort-to-DisplayPort cable.
    • Try different HDMI/DisplayPort cables.
    • Try different TBT cables.


  • Also, I want to confirm if you are using an NVIDIA or AMD GPU card.


Best regards, 

Jean O.  

Intel Customer Support Technician


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Graw
Beginner
444 Views

Hello Jean,

 

thanks for your fast reply.

 

The Bios has the latest version (0070) and I installed the Thunderbold driver.

But there is no change at the eDP interface.

When I connect a Display to the HDMI interface it is working fine.

Only the eDP interface has this problem.

 

Kind regards

Graw

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Jean_Intel
Moderator
439 Views

Hello Graw,


Thanks for your response.


This time I would like to confirm some information about your system:


  • I want to confirm if you are using an NVIDIA or AMD GPU card.
  • When you mentioned the HDMI interface, do you refer to the HDMI port within the Nuc?
  • Have you tried different monitors and display cables? Remember to use straight connections with no video adapters/dongles in between.
  • Did you BIOS default on the Intel NUC? In order to do so follow these steps:
    • Press F2 during boot to enter BIOS Setup.
    • Press F9 to load default settings.
    • Press F10 to save and exit BIOS.


Best regards, 

Jean O.  

Intel Customer Support Technician


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Graw
Beginner
423 Views

Hello Jean,

 

here are the answers:

 

  • I want to confirm if you are using an NVIDIA or AMD GPU card.

We use the eDP connector on the CMB1ABA. It is the small flat IPEX connector.

It is working with the internal INTEL graphics. I think it is not possible to connect a GPU to this board....

 

  • When you mentioned the HDMI interface, do you refer to the HDMI port within the Nuc?

I mean the two HDMI connectors of the CMB1ABA.

 

  • Have you tried different monitors and display cables? Remember to use straight connections with no video adapters/dongles in between.

Yes I tried different monitors. On the HDMI ports it is working, but the eDP interface is not working correctly. When the supply voltage is higher than 19 Volt the interface is turning off and the display is flickering between 12 V and 19 V. I think the eDP interface isn't implemented correctly. Maybe a BIOS update or driver update can solve it.

 

  • Did you BIOS default on the Intel NUC? In order to do so follow these steps:
    • Press F2 during boot to enter BIOS Setup.
    • Press F9 to load default settings.
    • Press F10 to save and exit BIOS.

I tried it several times.

 

Kind regards

Graw

 

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Jean_Intel
Moderator
414 Views

Hello Graw,


Thank you for the information provided.  


I will proceed to check the issue internally and post back soon with more details. 


Best regards, 

Jean O.  

Intel Customer Support Technician


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Jean_Intel
Moderator
407 Views

Hello Graw,


Thanks for waiting for a response.


I would like to request more information about the eDP you are using, please provide me with the following:

  • What is the display model you are using?
  • Have you tried using this display monitor on another eDP environment?


Best regards, 

Jean O.  

Intel Customer Support Technician


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Jean_Intel
Moderator
355 Views

Hello Graw,


I hope you are doing fine.


Were you able to check the previous post?

Let us know if you still need assistance.


Best regards, 

Jean O.  

Intel Customer Support Technician


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Jean_Intel
Moderator
332 Views

Hello Graw,

 

I hope you are doing fine.

 

I have not heard back from you. So I will close this thread. If you need any additional information, submit a new question, as this thread will no longer be monitored.

 

Best regards.

Jean O. 

Intel Customer Support Technician.


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