amdgpu 0000:84:00.0: gpu post error! \\ Fatal error during GPU init

[Dennis Schridde]

Hello!

I am trying to use an AMD FirePro S7150X2 with the AMDGPU driver of a Linux 
4.10.9 kernel (CoreOS Container Linux) and linux-firmware 
e39f0e3e6897ad865b3704f61218ae83f98a85da, but I run into the following error 
after the amdgpu module is being loaded:

[   17.692746] amdgpu 0000:84:00.0: enabling device (0000 -> 0003)
[   17.692940] [drm] initializing kernel modesetting (TONGA 0x1002:0x6929 
0x1002:0x0334 0x00).
[   17.692963] [drm] register mmio base: 0xD0100000
[   17.692964] [drm] register mmio size: 262144
[   17.692970] [drm] doorbell mmio base: 0xF0000000
[   17.692971] [drm] doorbell mmio size: 2097152
[   17.692980] [drm] probing gen 2 caps for device 10b5:8747 = 8796103/10e
[   17.692981] [drm] probing mlw for device 10b5:8747 = 8796103
[   17.692992] [drm] VCE enabled in physical mode
[   18.648132] ATOM BIOS: C76301
[   18.651758] [drm] GPU posting now...
[   23.661513] [drm:amdgpu_connector_add [amdgpu]] *ERROR* atombios stuck in 
loop for more than 5secs aborting
[   23.673155] [drm:amdgpu_connector_add [amdgpu]] *ERROR* atombios stuck 
executing F250 (len 334, WS 4, PS 0) @ 0xF365
[   23.685453] [drm:amdgpu_connector_add [amdgpu]] *ERROR* atombios stuck 
executing DB34 (len 324, WS 4, PS 0) @ 0xDC2C
[   23.697816] [drm:amdgpu_connector_add [amdgpu]] *ERROR* atombios stuck 
executing BCDE (len 254, WS 0, PS 4) @ 0xBDB4
[   23.710137] [drm:amdgpu_connector_add [amdgpu]] *ERROR* atombios stuck 
executing B832 (len 143, WS 0, PS 8) @ 0xB8A9
[   23.722451] amdgpu 0000:84:00.0: gpu post error!
[   23.727950] amdgpu 0000:84:00.0: Fatal error during GPU init
[   23.734594] [drm] amdgpu: finishing device.
[   23.739592] ------------[ cut here ]------------
...
[   24.096608] ---[ end trace 88c8cb35b32e3b88 ]---
[   24.102086] BUG: unable to handle kernel NULL pointer dereference at 
0000000000000018
[   24.111438] IP: __ww_mutex_lock+0x24/0xa0
[   24.116222] PGD 0 
[   24.116223] 
[   24.120737] Oops: 0002 [#1] SMP
...

Please find a full log attached.

My kernel configuration is available at:
 https://github.com/urzds/coreos-overlay/blob/hpc_support/sys-kernel/coreos-modules/files/{commonconfig-4.10,amd64_defconfig-4.10}
Please refer to the the commit log of the "hpc_support" branch for my changes 
compared to the CoreOS CL stock config.

I would be very glad if you could help me in debugging the issue and getting 
the GPU running.

Thanks,
Dennis
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