X11 not working on 11-STABLE with AMDGPU

[CL Moonriver]

Resending this because I want to make sure jung-uk Kim gets included in 
the future discussion.

Sorry for the really delayed response.

Yes, I am 100% sure I am booting with UEFI. And I don't seem to have any 
issues. Again, the only bug I still encounter is that occasionally X 
hangs and has to restart the driver. And if I look at the console, I get 
errors about "GPU not responding. Attempting to reset GPU", and so on.

I don't know if it helps, but again, my CPU is an AMD A10-7860K (2016) 
model with onboard Radeon R7 graphics. If there's any other info I can 
provide, please let me know.


On 08/06/2018 11:20 AM, Jung-uk Kim wrote:
> On 18. 8. 3., Greg V wrote:
>> On Fri, Aug 3, 2018 at 2:16 AM, CL Moonriver
>> <clmoonriver at equinedreams.art> wrote:
>>> Thanks for the heads up.
>>>
>>> Are you sure this is still relevant in drm-next? I don't see any dmesg
>>> error about disabling GPU acceleration. I did what you suggested, but
>>> nothing seems to have changed except I get no text until radeonkms has
>>> loaded (I don't get garbage I get nothing at all). I still get dmesg
>>> errors regarding ring test failures and such, so turning the EFI
>>> framebuffer off doesn't appear to have actually changed anything.
>> Interesting. Are you 100% sure you're booting with UEFI, not CSM/legacy?
>>
>> Maybe radeonkms doesn't conflict anymore. Maybe this depends on the GPU
>> model or something?
>>
>> For amdgpu (RX 480), it's not an error about disabling acceleration, the
>> amdgpu driver *completely* fails to load when EFI framebuffer is active.
>> And I retested a few weeks ago. No one fixed this specifically yet, so
>> I'm not expecting it to magically stop conflicting…
> It wasn't fixed and some MMIO test still fails.  Actually, both
> radeonkms and amdgpu still do not work properly when UEFI is active.  I
> don't think it is too hard to fix but I didn't dig deeper at the time.
>
> Jung-uk Kim
>