P: Preview Thumbnails are Black

I updated to 6.2 today. I work in a nightclub, and thus can have anywhere from 300-500 images per night, so I tend to let "Auto-tone" do a lot of the work for me. I have Lightroom set to apply auto-tone on import. When Lightroom imports my images (directly from my D610, for which my ACR is fully up to date), it adjusts the exposure all the way to the left, and no matter what I do, I can't get the images back. They stay completely black. I've dragged the exposure right up to the right and it did nothing. Another strange part of this is when I mouse over the histogram, the image is flat blue instead of flat black. I've tried enabling GPU acceleration and disabling it again, nothing, I've updated my display drivers, nothing. This is driving me insane and I have 580 images to process for the club for tomorrow morning. Any help would be appreciated.

Hallo,
seit dem letzten Update von Lightroom CC werden meine importierten Fotos nur in schwarz dagestellt. Erst wenn ich die Fotos anklicke und auf automatische Tonwertkorrektur gehe, werden die Bilder angezeigt.
Wo liegt der Fehler?

The latest Lightroom was downloaded on to my iMac, when I load images into it they just turn black.I don't have that problem on my Macbook Pro

Great! Thank you!

Hello. I have problems with thumbnails generation and photo viewing. First photo thumbnail is normal but then i have just black rectangle.
I can add important info. I think i found direct problem. I import from card my CR2 files. and if Preferences > Presets > Apply auto tone adjustments option is on, all my photos become black auto this “auto tone adjustment”. After i reseted all default Developer settings, i got my photos and they are normal as was expected. I thing there is a bug with this option.

Many thanks Victoria - sorry I didn't find this thread before posting.

I have Apply autotone settings in Preferences selected.

When I import files, Auto Tone sets Exposure to -5 and leaves the other settings at 0.

Manually clicking Auto Tone in the Develop module corrects everything.

Have I missed an important setting somewhere?

Windows 10
Lightroom CC

Perfect! it works.

Thank you so much for this answer. I had never experienced the problem until today. As I am running 6.2.1 on Windows 10 I assumed import issues were fixed!