Only 1 GPU works (out of 4) after switching to 16.04 and amdgpu-pro

Hi,

I've been mining on an Ubuntu 15.10 x64 with fglrx and most of the things we working. I upgraded to Xenial (16.04.1) and amdgpu-pro, and ethminer started to detect only 1 GPU out of 4.

uname -a: Linux xxx 4.4.0-45-generic #66-Ubuntu SMP Wed Oct 19 14:12:37 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

amdgpu-pro version: 16.60-379184

$ lspci | grep VGA
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Tonga PRO [Radeon R9 285/380] (rev f1)
02:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Tahiti XT [Radeon HD 7970/8970 OEM / R9 280X]
03:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Tahiti XT [Radeon HD 7970/8970 OEM / R9 280X]
07:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Tahiti XT [Radeon HD 7970/8970 OEM / R9 280X]



$ ethminer --version
ethminer version 1.2.9
Build: Linux/g++/Interpreter/RelWithDebInfo

$ ethminer --list-devices
[OPENCL]:
Listing OpenCL devices.
FORMAT: [deviceID] deviceName
[0] Tonga
CL_DEVICE_TYPE: GPU
CL_DEVICE_GLOBAL_MEM_SIZE: 4118581248
CL_DEVICE_MAX_MEM_ALLOC_SIZE: 2919693312
CL_DEVICE_MAX_WORK_GROUP_SIZE: 256




Looks like the three R9 280X cards aren't detected by ethminer (but they're present in the lspci output).

Any ideas? Anyone else experienced similar issues?

BTW optiminer-zcash also only detectes the Tonga (R9 380) card.