After selecting an image in Library view, LR2015 frequently stops working when the 'Develop' tab is selected. The LR identifier at top of the window says 'Not responding'. Pressing the 'close' button generates a Windows message 'Adobe Photoshop Lightroom is nor responding'. I am running Windows 7 64 bit, with all current updates.
Try going to the Lightroom preferences, performance tab, and deselecting "user graphics processor".
Your suggestion seems to work, and provides a temporary fix which hopefully Adobe & AMD will resolve.