Similar bug to https://bugs.freedesktop.org/show_bug.cgi?id=92270

System freeze when booting.
tty1 output (something like):
amdgpu: ring 0 test failed



lspci -nn

01:00.0 Display controller [0380]: Advanced Micro Devices, Inc. [AMD/ATI] Venus
PRO [Radeon HD 8850M / R9 M265X] [1002:6823]



uname -a

Linux localhost.localdomain 4.11.1-gentoo #7 SMP PREEMPT Wed May 24 00:50:03
WEST 2017 x86_64 Intel(R) Core(TM) i7-4720HQ CPU @ 2.60GHz GenuineIntel
GNU/Linux




The graphic card works properly when using radeonsi kernel module.


I am trying to use amdgpu in this SI card

I canot provide any more logs because my system frezees completely when the
module is loaded.

I tried to update to latest linux firmware but I am already in the latest ones.

I think do a bisect doesn't makes sense because i feel this card have never
been working with amdgpu.

I need help to have useful logs in order to help you to fix the problem.