This is posted on behalf of a friend, since upgrading to the latest version of Lightroom CC on a PC he is having these issues
1. It takes about 5 minutes to do the initial preset instead of pretty instantly on 5.7
2. It keeps crashing after about 20 minutes saying there is an error and shutting down.
3. When I use the crop tool after a while of using it on various images the image goes completely white although the image is shown correctly in the navigator window.
4. It is slow loading each image when in development starting by showing a blank image, then a very grainy image one and then finally the proper image.
If anybody has any ideas or suggestions it would be most appreciated
turn off the graphics acceleration: go to Preferences, click on the Performance tab, then uncheck the box
Thanks very much :-)