Comment 3 for bug 1407850

Suspend works well with the latest AMD driver
ubuntu@201410-15952:~$ /usr/lib/nux/unity_support_test -c -p
OpenGL vendor string: ATI Technologies Inc.
OpenGL renderer string: AMD Radeon R7 M265 Series
OpenGL version string: 4.4.13283 Compatibility Profile Context 14.501.1003

Not software rendered: yes
Not blacklisted: yes
GLX fbconfig: yes
GLX texture from pixmap: yes
GL npot or rect textures: yes

Compiz supported: yes
ubuntu@201410-15952:~$

However, the rotation feature will cause black screen in performance mode. As per AMD's reply in the proprietary bug 1367681 it's not supported by their driver yet.