This is what worked for me:
- Right click "Start" and select "Control Panel" (Open classic Control Panel)
- In the right corner -> View by: "Small Icons"
- Change Display Settings
Now you will see the traditional display configuration screen.
- Select ("black/gray") extended monitor
- Make sure "Multiple displays" is not set to "Disabled ..."
- Select apply once done for all displays.
- Forced use of the DGPU for your game through the Nvidia control panel
- Verified through use of the Optimus Test Viewer that the game is using the DGPU
- Connected a monitor to the DGPU's hardware output and run the game on that monitor
Thanks for the reply - unfortunately, I think the problem is deeper than that. Once in the control panel, I don't even have a setting for multiple displays, since the Intel driver isn't enabled: when I go to advanced settings, it shows that the computer is using the Microsoft Basic driver set for the display. I'm not sure what a DGPU is, and I'm not trying to run any games, either - just basic Office and Windows apps.
Have you tried different cable from the laptop to the monitor?
I suggest try the recommendations at the following link:
NOTE: This link is being offered for your convenience and should not be viewed as an endorsement by Intel of the content, products, or services offered there.
Please uninstall the graphics driver you have and download and install the driver from the following link:
If this does not work I strongly recommend contacting Lenovo support as they are more familiar with your system and how all the components interact with each other.
I was unable to correct the situation. The Intel driver has been uninstalled and installed repeatedly. The cable and monitor are both in good working condition.
The problem almost certainly lies in some driver incompatibility. During the startup POST with the Lenovo splash screen displayed with a black background, the Intel driver is apparently working, because I can move the cursor from one monitor to the other without difficulty. As soon as Windows starts to load with a blue background screen, the cursor snaps to my laptop monitor and cannot be moved. To me, this indicates that the Intel driver is working until some other driver or background application either corrupts it or causes it to crash.
I posted a message on the Lenovo boards but did not receive useful assistance. I have not yet called Technical Support because I don't have several hours to hang out on the phone with someone.
Is there a key combination you need to press to turn the optional output on? It is probably a key labeled "Fn" plus one with a symbol for the two monitor types on it to toggle between them.
Run Windows update and install all the updates available.
Try to see if the Intel® Driver Update Utility detects any missing driver in your system.
Reinstalling Windows is the nuclear option. It will blow away your existing system software, replacing it with a fresh Windows system. If the issue continues after this, you likely have a hardware problem.