amdconfig --odgt --adapter=all only returns temp for adapter=0, but gives the above error for any and all other GPUs. lspci | grep VGA correctly identifies all cards. I'm on Ubuntu 14.04, on fresh install of latest AMD crimson drivers with no other apparent issues. And yes, I did do amdconfig --initial -f --adapter=all at the conclusion of my driver install of crimson drivers (Newly installed catalyst drivers (15.30.1025-x86.x86_64), on Ubuntu 14.04.3. I have encountered the same problem on three different machines/installations, and in fact various other --od commands encounter the same problem. Would appreciate any help. Thanks.
I resolved this by removing the drivers and reinstalling the automatic way via the GUI installer rather than building the packages manually. Still have no idea where the flaw was, and my original install was fine in every other respect.