[Bug 98552] RX 480 does not work as eGPU (amdgpu crashes at amdgpu_bo_init)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=98552

Alex Deucher <alexdeucher at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|FIXED                       |NOTOURBUG

--- Comment #12 from Alex Deucher <alexdeucher at gmail.com> ---
(In reply to Gašper Sedej from comment #10)
> By "BIOS" you also mean "EFI"?
> 

I mean the system bios, whether you are using legacy or EFI mode is largely
irrelevant.


> I will try to post full dmesg, but it's quite hard - to get "live" dmesg, I
> am using another computer connected via ssh and command
> watch -n 0.05 "dmesg | tail -n 100"
> and console to "micro" font size, so I can select and copy text it comes
> trough...
> 
> How can I access logs when kernel freezes due to graphics issue?
> 
> Also, if I boot computer with enabled eGPU (RX 480), I simply won't get
> anything because it crashes too quick to be able to capture trough ssh...
> (the monitor is blank even with text boot mode)

You can blacklist the amdgpu driver so it doesn't load and then dump the dmesg
output.  E.g., append the following to your kernel command line in grub:
modprobe.blacklist=amdgpu
If you want to load it manually after the system has booted just run (as root):
modprobe amdgpu

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