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

Michel Dänzer michel at
Mon Jan 7 15:44:44 UTC 2019

On 2019-01-07 4:21 p.m., Mikhail Gavrilov wrote:
> On Mon, 7 Jan 2019 at 15:09, Michel Dänzer <michel at> wrote:
>> Is this reproducible with commit 674e78acae0d ("drm/amd/display: Add
>> fast path for cursor plane updates") + the patch above?
> Yes. I am sure I am able reproduce issue:
> All new dmesg are attached.
>> 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)
> Commits 674e78acae0d and fc42d47ce011 already present in my patched kernel.

I mean:

Run "git checkout 674e78acae0d" and apply the patch. Build the kernel
and boot it. If it reproduces the problem, un-apply the patch, run "git
checkout fc42d47ce011", build the kernel and boot it. Test until either
it reproduces the problem, or you're at least 99% sure it won't.

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

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