No OpenCL Platforms Found

I'm using Ubuntu 14.04.4 with several R9 280s. I've installed the AMD APP SDK and fglrx-updates. aticonfig sees my GPUs but ethminer does not. What have I done wrong? I swear, this used to work.

Thanks in advance.

biostar-ubuntu1@biostar-ubuntu1:~/Downloads$ aticonfig --list-adapters
* 0. 01:00.0 AMD Radeon R9 200 Series     
  1. 03:00.0 AMD Radeon R9 200 Series     
  2. 04:00.0 AMD Radeon R9 200 Series     
  3. 06:00.0 AMD Radeon R9 200 Series     

* - Default adapter
biostar-ubuntu1@biostar-ubuntu1:~/Downloads$ ethminer --list-devices
[OPENCL]:No OpenCL platforms found
[OPENCL]:
Listing OpenCL devices.
FORMAT: [deviceID] deviceName

biostar-ubuntu1@biostar-ubuntu1:~/Downloads$ lsb_release -a
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 14.04.4 LTS
Release:	14.04
Codename:	trusty
biostar-ubuntu1@biostar-ubuntu1:~/Downloads$