OpenCL AMD APP Driver cannot detect GPU on Linux Server

0
votes

I use AMD A8-3870 APU with Radeon(tm) HD Graphics and Ubuntu 3.0.0-12-server.

I install the amd-driver 12-6 for x86_64.

However, when I run clinfo, I cannot detect the GPU device. Instead, it returns the CPU information.

Is it because I'm using APU or there is something wrong with the amd-driver and linux server?

Thank you~

1
openclamd-processor
As far as I know, AMD OpenCL implementation requires access to X server to use GPUs (not sure about APUs, but likely the same). Make sure your X server is running, is configured for using integrated GPU and (if you are connected via ssh) you have done all necessary steps described on AMD's website - aland
I think you are right. However, when I configure the X server, I found that there is no ati device listed in /dev folder. Do I need to set it up some how for this? - Adam Yang
Check if ati-config --lsa finds your APU. If it does not, it's likely your driver was incorrectly installed. If it does, just let it configure Xorg automagically (sudo aticonfig --adapter=all --initial), it usually helps. - aland

1 Answers

0
votes

The AMD integrated GPU is materially disabled at startup as soon as a discrete GPU is plugged in. cf for example http://devgurus.amd.com/thread/153198