Comment on attachment 142147 [details]
dmesg R9 390

Similar error ...

01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI]
Hawaii PRO [Radeon R9 290/390] (rev 80)
        Subsystem: XFX Pine Group Inc. Hawaii PRO [Radeon R9 290/390]
        Kernel driver in use: amdgpu
        Kernel modules: amdgpu

[    7.429944] amdgpu: [powerplay] Failed to retrieve minimum clocks.
[    7.429945] amdgpu: [powerplay] Error in phm_get_clock_info 
...
[   18.949366] amdgpu 0000:01:00.0: amdgpu_device_ip_init failed
[   18.949370] amdgpu 0000:01:00.0: Fatal error during GPU init
[   18.949387] [drm] amdgpu: finishing device.

But the device fails to init.

Kernel 4.19.0
linux-firmware.git