Re: Random system freezes with Linux 6.12 + Xenomai 3.3.1 on Intel Ultra 5 125H

Hello Jan,
=C2=A0=C2=A0=C2=A0 No Xenomai user=E2=80=91space programs are running on th=
e customer=E2=80=99s system.

> From: "Jan Kiszka"<[email protected]>
> Date:=C2=A0 Fri, Jul 31, 2026, 13:44
> Subject:=C2=A0 Re: Random system freezes with Linux 6.12 + Xenomai 3.3.1 =
on Intel Ultra 5 125H
> To: "=E5=88=98=E6=9D=A8"<[email protected]>
> Cc: "xenomai"<[email protected]>, "=E5=AE=8B=E5=81=A5=E7=8E=AE"<son=
[email protected]>, "=E6=9D=8E=E5=B0=8F=E5=AE=81"<lixiaoning@sinsegy=
e.com.cn>, "=E9=A9=AC=E5=90=9B"<[email protected]>
> On 31.07.26 06:25, =E5=88=98=E6=9D=A8 wrote:
> > Hello,
> > I am using Linux kernel 6.18 with Xenomai 3.3.1. I have set i915.modese=
t=3D0=C2=A0in GRUB to prevent the i915 driver from loading.
> > Since trace=E2=80=91cmd logs cannot be dumped when the kernel hangs, I =
configured the following sysctl parameters:
> > plaintext
> >=C2=A0
> > sudo=C2=A0sysctl -w kernel.panic_on_rcu_stall=3D1
> > sudo=C2=A0sysctl -w kernel.ftrace_dump_on_oops=3D1
> > sudo=C2=A0sysctl -w kernel.panic=3D0
> >=C2=A0
> > The full serial log is attached. Could you please help analyze whether =
the log contains sufficient information for troubleshooting? Thank you.
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> I'm missing cobalt events other cores and an annotation inside the trace
> where the error was noticed. That's why I proposed a different recording
> method.
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> Also, as the RCU stall detection may be delayed too much to still see
> normal operation in the trace, you might have to tune the timeout
> (https://docs.kernel.org/RCU/stallwarn.html#fine-tuning-the-rcu-cpu-stall=
-detector)
> until we find an earlier problem indicator.
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> Jan
>=C2=A0
> --=C2=A0
> Siemens AG, Foundational Technologies
> Linux Expert Center
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