AMD Radeon RX550 not detected

Attila Kinali attila at
Tue Aug 15 12:20:25 UTC 2017

On Tue, 15 Aug 2017 09:21:22 +0200
Attila Kinali <attila at> wrote:

> > So this looks like a Xorg bug. No idea offhand what's happening,
> > somebody who can reproduce this needs to trace the code execution from
> > amdgpu_kernel_mode_enabled returning TRUE to xf86BusConfig printing "No
> > devices detected." to find out what goes wrong in between.
> I could do this if you could tell me where to look.
> As I am not regularly dabbling in Xorg code, I have no idea
> which part might be at fault or where to start.

I took another couple of hours to debug this... turns out it was
another case of PEBCAK. There was a bit of old config lying around
that prevented the card from initializing correctly.

Sorry about all the fuzz.

			Attila Kinali
You know, the very powerful and the very stupid have one thing in common.
They don't alters their views to fit the facts, they alter the facts to
fit the views, which can be uncomfortable if you happen to be one of the
facts that needs altering.  -- The Doctor

More information about the xorg mailing list