P: Moving sliders causes image colors to dim and brighten

Just updated to RAW 9.5 and Lightroom 6.5 and I'm experiencing the problem in both apps.

Whenever I make a change (exposure, contrast, highlights, blacks etc.) the image flickers. So there's no smooth transition, it just jumps around constantly from bright to dark and back again. It does end up with the correct result once I'm done but it's very difficult to see what I'm actually doing while doing it.

Macbook, El Capitan v. 10.11.4
All Creative Cloud apps are up to date

Lightroom updated a couple of days ago and now the screen flashes darker whenever I move a slider in develop module if graphics acceleration is turned on. Adobe really seem to have struggled with hardware acceleration implementation to me 😞 (using OSX El Capitan)

you're right, I switched off UGP and it worked. Thanks Chris!

i would try to just switch off UGP. i have had no problems after that switch is off. going strong so far.

I made the same experience. Whenever I hovered over the sliders or I tried to drag them in any direction it dims and lightens and I also get a reduced quality of the image looking as it would have been painted with a fineliner...
I switched of graphics acceleration and LR runs like before the update. I now will follow Chris Schwegler in switching off the UGP having already uninstalled LR and am now re-downloading the app. Let's see what happens...  

No, does not help...

What is not shown in the video is, the longer I hold down on the sliders, the more active the color change is on the dimming and brightness.

This just started happening. The Catalog has been used for editing and restarted. The Catalog yesterday was 35MB. Now it's 230 GB.

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found another solution that worked for me.

1. disabling "Use Graphic Processor" worked like a charm.
2. disable "UGP" and then uninstalled LR and reinstalled and then enable "Use Graphic Processor". I dont know if just uninstalling LR would work, just giving you my process.

Interesting. I am working i n an older catalog I just updated and its not doing this. But was last night on a newer catalog. This catalog is 35 MB. Other catalogs range from 110 to 800MB