AMD Radeon RX550 not detected

Michel Dänzer michel at
Wed Aug 16 01:01:11 UTC 2017

On 15/08/17 09:20 PM, Attila Kinali wrote:
> 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.

No worries. You can make up for it by sharing what the problematic bit
of old config was. :)

Earthling Michel Dänzer               |     
Libre software enthusiast             |             Mesa and X developer

More information about the xorg mailing list