(In reply to jian-hong from comment #36)
> Created attachment 140806 [details]
> dmesg of 4.18.0-rc6
> 
> Tested with Linux 4.18.0-rc6 kernel.
> It seems the amdgpu module could be loaded correctly. I tried over 20 times.

I am still hitting this issue, though less often with 4.18-rc6. Could you
please attach your configuration, your build instructions? It seems independent
from the compiler (gcc version 6.3.0 20170516 (Debian
6.3.0-18+deb9u1endless2bem1)) as I use GCC 8.1.0 from Debian Sid/unstable.