Ubuntu 16.04 - fglrx is deprecated - is "radeon" driver OK these days?

[hzhang]

The only problem now is that since there is no X running on the GPU, ADL does not work (returns -21 ADL_ERR_NO_XDISPLAY), and things like temperature control do not work. This can be solved by put ADL into console mode via the ADL_ConsoleMode_FileDescriptor_Set API when ADL_ERR_NO_XDISPLAY is detected. More details can be found on the AMD community forum.

https://community.amd.com/thread/169973
https://community.amd.com/thread/189505