[Bug 108521] RX 580 as eGPU amdgpu: gpu post error!

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=108521

--- Comment #51 from Robert Strube <rstrube at gmail.com> ---
Hello Everyone,

I realize it's been a long time since I updated this bug report, apologies in
advance.  I decided to give up on eGPUs + Linux (over Thunderbolt 3) for a
while, and didn't get a chance to really tackle the problem again until more
recently.

Since my initial report, I have been able to get an eGPU working with my Dell
XPS 9575, but only with a Nvidia GPU (specifically an RTX 2070).  I did try
another AMD card, but ran into the same problems.

I'll attach my dmesg and lspci information in the hopes that this might shed
some light on why the nvidia GPU works correctly (albeit with the proprietary
driver) and certain AMD GPUs don't.

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