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Blackbird Radeon RX580

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mcarden:
A couple of years ago I assembled a Blackbird into a case with a Radeon RX580 GPU, installed a version of Fedora Linux and I don't recall having to do anything special to make it work.

This week I dropped the Radeon back into the Blackbird which now runs Fedora 35 Workstation, and it doesn't produce video.

uname -r
5.14.16-301.fc35.ppc64le

The card is seen along with the aspeed one:

lspci | grep VGA
0000:01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Ellesmere [Radeon RX 470/480/570/570X/580/580X/590] (rev e7)
0005:02:00.0 VGA compatible controller: ASPEED Technology, Inc. ASPEED Graphics Family (rev 41)

And the kernel is loading modules for it:

lsmod | grep -i amdgpu
amdgpu               8257536  1
drm_ttm_helper        262144  3 drm_vram_helper,ast,amdgpu
ttm                   327680  3 drm_vram_helper,amdgpu,drm_ttm_helper
mfd_core              327680  1 amdgpu
gpu_sched             327680  1 amdgpu
i2c_algo_bit          262144  2 ast,amdgpu
drm_kms_helper        524288  5 drm_vram_helper,ast,amdgpu
drm                   851968  10 gpu_sched,drm_kms_helper,drm_vram_helper,ast,amdgpu,drm_ttm_helper,ttm
i2c_core              327680  8 drm_kms_helper,i2c_algo_bit,at24,ast,amdgpu,i2c_opal,regmap_i2c,drm

The only clue I have found so far comes from dmesg, which says in part:

[  121.619204] amdgpu 0000:01:00.0: [drm] Cannot find any crtc or sizes
[  133.894384] amdgpu 0000:01:00.0: refused to change power state from D0 to D3hot

I don't recall seeing this in the past (though I may have and have just forgotten) but I wonder if someone could point me in the direction of what I'm missing to get this going?

Thanks,
MC

MauryG5:
Hi, unfortunately it is the same problem that I have pointed out since the Linux Kernel moved to version 5.14.X.  From this Kernel version onwards, at the moment, AMD GPUs no longer boot and you need a Kernel up to 5.13.19 to make it work.  They showed me a post where they understood the problem but I don't know how to do that procedure they talk about to avoid this ...

ClassicHasClass:
What are your kernel command line options? According to https://bugzilla.kernel.org/show_bug.cgi?id=200695 some people have had trouble with amdgpu.dc=1 (setting it to =0 seemed to fix it), though that problem seems to be somewhat old. There are a lot of comparable WX7100 OpenPOWER systems out there which should be the same generation, so I would expect this to be a more widespread problem (but I haven't upgraded my workstation to 35 yet either, planning to do the BMC-only Blackbird this week).

MauryG5:
Hi Classic, the problem I know for sure occurs with Kernels from version 5.14 onwards, including the new 5.15 which I just tested a few days ago and which still suffers from the same bug.  Can you tell me where to go or how to proceed to verify this part you are talking about?  Thanks

mcarden:
@ClassicHasClass, I had tried adding 'amdgpu.dc=0' to the kernel command line on boot but it didn't help.

--
MC

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