@claymore
On Ubuntu 16.04 with  
amdgpu-pro-17.10-401251 (catalys 15 don't install. v16 works but 17 seems better)
and
AMD-APP-SDK-v3.0.130.136-GA-linux64 installed...
I use a RX470

all goes fine but at start of ethdcrminer64 v9.1 I have
"AMD ADL library not found."
and
AMDAPPSDKROOT=/opt/AMDAPPSDK-3.0
environment variable set in the systemd service

I don't know if it is a problem.
-asm 2 does not improve anything over -asm 1
I have temp and fan status
"GPU0 t=59C fan=67%"

I want to make all perfect, maybe I'm searching for inexistent problems...