linux-kernel - Re: 6.15-rc6/regression/bisected - after commit f1c6be3999d2 error appeared: *ERROR* dc_dmub_srv_log_diagnostic

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Message-ID: <CABXGCsNkBCjh_jSJ+tT=xPiSSby-XM6qsnGfCFq4pPPZ8jspGA@mail.gmail.com>
Date: Sat, 24 May 2025 01:52:11 +0500
From: Mikhail Gavrilov <mikhail.v.gavrilov@...il.com>
To: "Pillai, Aurabindo" <Aurabindo.Pillai@....com>
Cc: "Chung, ChiaHsuan (Tom)" <ChiaHsuan.Chung@....com>, "Wu, Ray" <Ray.Wu@....com>, 
	"Wheeler, Daniel" <Daniel.Wheeler@....com>, "Deucher, Alexander" <Alexander.Deucher@....com>, 
	amd-gfx list <amd-gfx@...ts.freedesktop.org>, dri-devel <dri-devel@...ts.freedesktop.org>, 
	Linux List Kernel Mailing <linux-kernel@...r.kernel.org>, 
	Linux regressions mailing list <regressions@...ts.linux.dev>
Subject: Re: 6.15-rc6/regression/bisected - after commit f1c6be3999d2 error
 appeared: *ERROR* dc_dmub_srv_log_diagnostic_data: DMCUB error

On Wed, May 21, 2025 at 10:13 PM Pillai, Aurabindo
<Aurabindo.Pillai@....com> wrote:
>
> [AMD Official Use Only - AMD Internal Distribution Only]
>
>
> Hi Mike,
>
> Thanks for the details. We tried to repro the issue at our end on 9000 and 7000 series dgpu, but we're not seeing the dmub errors. We were on Ubunti, so we'll try Fedora.
>

Hi Aurabindo,

Were you able to reproduce the problem?

I also have a 7900XTX, and based on my testing, the issue is
significantly harder to reproduce on this GPU compared to the 6900XT.
However, I did eventually see this in the logs:

amdgpu 0000:03:00.0: [drm] *ERROR* dc_dmub_srv_log_diagnostic_data:
DMCUB error - collecting diagnostic data

It appeared only after a long uptime under load, and unlike with
6900XT, the system did not freeze.
Still, this suggests the problem might be latent or manifest
differently on RDNA 3.

Looking forward to hearing your findings on Fedora.

-- 
Best Regards,
Mike Gavrilov.

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