NUC11PABi7: I have dual monitor setup (Mini-DisplayPort & HDMI). It was previously working perfect f

[LasVegas4590]

Both monitors actively display the POST. But the Windows 10 login displays on the secondary (HDMI) monitor. When I login, only the secondary monitor displays the Windows desktop (Mini-DisplayPort monitor is blank).

I found a work around: Before I login into Windows, I unplug the Mini-DisplayPort cable and then re-plug in. At that point everything returns to normal and the primary monitor (Mini-DisplayPort) is active.

The BIOS setting has the Mini-DisplayPort as primary.

[Jean_Intel]

Hello @LasVegas4590

Thank you for posting on the Intel️® communities.  

To have a better understanding of your issue, please provide me with the following:

• When did the issue start to happen?
• Was there a major hardware or software update before the issue started?
• How are the monitors set? Are there set as Duplicate or Extend these displays?
• Which is the display set as the primary monitor?

I'm looking forward to hearing from you.

Best regards, 

Jean O.  

Intel Customer Support Technician

[LasVegas4590]

• My NUC and Monitors have had no configuration changes for more than 6 month and always functioned as expected.
• I’m not aware of any updates preceding this issue.
• My dual monitors are configured as “Extended Displays”
• Primary monitor: Samsung LU25R55 connect by a Mini DisplayPort > DisplayPort cable (“Make this my main display” is checked in Windows settings)
• Secondary monitor: HP 24mh connected by a HDMI to HDMI cable
• Upon bootup, my Mini DisplayPort monitor displays the POST first and the HDMI monitor displays the POST a second later.
• The Windows login displays on the HDMI connected monitor. (Correct functionality would be that the Mini DisplayPort connected monitor should be displaying the Windows login.)
• Previously the Windows login screen would appear on the Mini DisplayPort connected monitor (currently it is not getting a signal).
• When I log into Windows on the HDMI connected monitor, I only have that one screen visible, the Mini DisplayPort connected monitor still has no signal.
• So far, the only way that I have been able to get correct functionality is that once the Windows login appears on the HDMI connected monitor, I unplug the Mini DisplayPort and then re-plug it in. The Mini DisplayPort connected monitor then gets signal, the HDMI monitor loses signal. I log into Windows, and then everything is normal.
• I am convinced that this is driver issue because once I am in normal functionality, I restarted the driver with the WinKey + Shift + Ctrl +B command. The Mini DisplayPort connected monitor lost signal and the HDMI connected monitor displayed the Windows desktop. Once I unplugged and re-plugged the Mini DisplayPort connected monitor, everything returned to normal.

[Jean_Intel]

Hello @LasVegas4590.

Thanks for your response.

We understand you have opened an email case with us and we will continue to help you through that channel now. We will therefore close this community case. Please keep in mind that this thread will no longer be monitored by Intel. Thank you for your understanding.  

Best regards

Jean O. 

Intel Customer Support Technician