Re: kernel panic when resuming from hibernate in next-20260406 with PREEMPT_RT

[Ostrowski, Rafal]

I was able to reproduce problem locally on Ubuntu 6.19.0+ #64 SMP PREEMPT_RT

Tomorrow I will do my best to fix it. I will let you know by the end of day tomorrow about my progress.

Kind Regards,
Rafal Ostrowski
________________________________________
From: Bert Karwatzki <spasswolf@xxxxxx>
Sent: Thursday, April 9, 2026 3:33 PM
To: Ostrowski, Rafal <Rafal.Ostrowski@xxxxxxx>
Cc: Varone, Dillon <Dillon.Varone@xxxxxxx>; spasswolf@xxxxxx <spasswolf@xxxxxx>; Hung, Alex <Alex.Hung@xxxxxxx>; Deucher, Alexander <Alexander.Deucher@xxxxxxx>; Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>; Thomas Gleixner <tglx@xxxxxxxxxxxxx>; linux-kernel@xxxxxxxxxxxxxxx <linux-kernel@xxxxxxxxxxxxxxx>; linux-next@xxxxxxxxxxxxxxx <linux-next@xxxxxxxxxxxxxxx>; linux-rt-devel@xxxxxxxxxxxxxxx <linux-rt-devel@xxxxxxxxxxxxxxx>; amd-gfx@xxxxxxxxxxxxxxxxxxxxx <amd-gfx@xxxxxxxxxxxxxxxxxxxxx>
Subject: Re: kernel panic when resuming from hibernate in next-20260406 with PREEMPT_RT


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Am Donnerstag, dem 09.04.2026 um 13:30 +0000 schrieb Ostrowski, Rafal:
>
>
>
> [AMD Official Use Only - AMD Internal Distribution Only]
>
> Hi Bert,
>
>
> Sorry that you experience this issue.
>
>
> Do you have all these 3 patches?:
> "drm/amd/display: Move FPU Guards From DML To DC - Part 1"
> "drm/amd/display: Move FPU Guards From DML To DC - Part 2"
> "drm/amd/display: Move FPU Guards From DML To DC - Part 3"
>
>
> These are highly dependent on each other.
>
>
> Kind Regards,
> Rafal
>

The crashes also occur when all three patches are applied.

Bert Karwatzki