You need to turn off the GPU Preferences in Lightroom.
First you need to reset the Lightroom Preferences.
Navigate to the preferences file:
Mac OS: /Users/[user name]/Library/Preferences/com.adobe.Lightroom6.plist
Windows 7, 8: C:\Users\[user name]\AppData\Roaming\Adobe\Lightroom\Preferences\Lightroom 6 Preferences.agprefs
Rename the preferences file Lightroom 6 Preferences.agprefs.old
Now, When you launch the Lightroom it will open on the Library Module.
Go to Edit Menu on the top Menu(Windows)/ Click on the Lightroom on the top (Mac)
Click on the Preferences
Go to the Performance tab
Uncheck the GPU settings from there.
Restart the Lightroom
Let us know if it helps,
I'm having the same problem. But I seem to be unable to uncheck the box, as lightroom gets stuck there. Is there a way around this?
Yes, follow the below steps.
You need to turn off the Graphics Processor from the Lightroom Preferences.
Open Control Panel >> Go to Device Manager >> Under the Display Adapter look for the Graphics Adapter >> Right Click and disable.
Go to Lightroom Preferences from the Edit menu
Click on Performance tab
Uncheck the Graphics Processor
Open and check if it works fine, then go back to the Device Manager and enable the Graphics Processor.
Let us know if that helps.