I downloaded the trial version of Photoshop CC 2015 and Lightroom. At first, I could not open RAW files in Photoshop using a Pentax KS-1 and DNG which is a native raw format for that camera. I downloaded ACR 9.9.1 and it worked. However, it is not working in Lightroom. I can import RAW files and see the thumbnails and preview. But when I select one and click on Develop, the preview shows a blue background with a white X through it. I do have the RAW interface just no image to work on. Can anyone tell what I can do to remedy this? As I mentioned, this is a trial so I only have 30 days to decide whether to subscribe or not.
The blue screen with the white X is resolved by going to your Lightroom preferences, performance tab and uncheck the "Use graphics processor" option.
Thanks! I've been googling for two days and it was something that simple!