System with kernel 4.21 hang immediately after start (invalid opcode: 0000 [#1] SMP NOPTI)

[Michel Dänzer]

On 2019-01-06 11:26 p.m., Mikhail Gavrilov wrote:
> On Sat, 5 Jan 2019 at 01:13, Mikhail Gavrilov
> <mikhail.v.gavrilov at gmail.com> wrote:
>>
>> On Fri, 4 Jan 2019 at 23:02, Michel Dänzer <michel at daenzer.net> wrote:
>>>
>>> On 2019-01-04 4:24 p.m., Alex Deucher wrote:
>>>> On Fri, Jan 4, 2019 at 9:52 AM Mikhail Gavrilov
>>>> <mikhail.v.gavrilov at gmail.com> wrote:
>>>>>
>>>>> Hi folks I found that kernel 4.21 unworkable with AMD hardware.
>>>>> Also I am make kernel bisect and founded the blame commit.
>>>>> First bad commit: [674e78acae0dfb4beb56132e41cbae5b60f7d662]
>>>>> drm/amd/display: Add fast path for cursor plane updates
>>>>
>>>> IIRC, the issue only shows up with newer versions of the ddx.
>>>
>>> Wayland compositors seem to hit it as well, I think Mikhail is using
>>> GNOME on Wayland.
>>
>> Exactly!
> 
> Even after applying patch
> https://cgit.freedesktop.org/~agd5f/linux/patch/?id=77acd1cd912987ffd62dad6a09275a1fb406f0c2
> SMP NOPTI occurs

Is this reproducible with commit 674e78acae0d ("drm/amd/display: Add
fast path for cursor plane updates") + the patch above?

If yes, is it not reproducible with commit fc42d47ce011 ("drm/amdgpu:
Enable GPU recovery by default for CI")? (Please test long enough to be
at least 99% sure before saying it's not)


-- 
Earthling Michel Dänzer               |               http://www.amd.com
Libre software enthusiast             |             Mesa and X developer