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Date:      Mon, 27 Mar 2023 14:56:29 -0700
From:      Cy Schubert <Cy.Schubert@cschubert.com>
To:        Mathias Picker <Mathias.Picker@virtual-earth.de>
Cc:        Shane Ambler <FreeBSD@ShaneWare.Biz>, FreeBSD-STABLE <freebsd-stable@freebsd.org>
Subject:   Re: -stable from today dumps core with drm-510-kmod and some  graphical clients
Message-ID:  <20230327145629.3b55eed8@slippy>
In-Reply-To: <044587F7-4BA9-4585-A789-F4B53E8D02A2@virtual-earth.de>
References:  <86o7og27eh.fsf@virtual-earth.de> <8b47d0a4-a8f1-1841-ee59-3949fe69cbd7@ShaneWare.Biz> <20230327210535.9ED5A1D7@slippy.cwsent.com> <044587F7-4BA9-4585-A789-F4B53E8D02A2@virtual-earth.de>

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On Mon, 27 Mar 2023 23:43:35 +0200
Mathias Picker <Mathias.Picker@virtual-earth.de> wrote:

> Am 27. M=C3=A4rz 2023 23:05:35 MESZ schrieb Cy Schubert <Cy.Schubert@csch=
ubert.com>:
> >In message <8b47d0a4-a8f1-1841-ee59-3949fe69cbd7@ShaneWare.Biz>, Shane=20
> >Ambler w
> >rites: =20
> >> On 26/3/23 01:37, Mathias Picker wrote: =20
> >> >=20
> >> > Starting sddm works fine, starting my normal session crashes or free=
zes
> >> > FreeBSD.
> >> >=20
> >> > I can find no error messages after a reboot.
> >> >=20
> >> > I found out, that I can start xterm or emacs (exwm) without problems,
> >> > xrandr works with external screen, but once I start anything more
> >> > demanding (I guess demanding of the GPU) everything freezes or FreeB=
SD
> >> > even reboots.
> >> >=20
> >> > =C3=A2=C2=80=C2=9CDemanding=C3=A2=C2=80=C2=9D means even simple thin=
gs like qterminal. I tried firefox an =20
> >> d =20
> >> > blender and then I had it with the reboots and didn=C3=A2=C2=80=C2=
=99t try anything else.
> >> > xedit works fine :)
> >> >=20
> >> > I have nothing in the logs, I have no idea where to look or how to d=
ebug
> >> > this.
> >> >=20
> >> > Any ideas, tipps, help greatly apreciated. =20
> >>
> >>
> >> FreeBSD Developers Handbook Chapter 10: Kernel Debugging
> >>
> >> https://docs.freebsd.org/en/books/developers-handbook/kerneldebug/
> >>
> >> Running stable, kernel dumps may already be enabled, look in /var/crash
> >>
> >> By enabling a kernel dump when it panics (dumpdev=3D"AUTO" in rc.conf)=
 the
> >> kernel core is saved to swap space, then on reboot gets copied to
> >> dumpdir (/var/crash) where you can then use kgdb (from devel/gdb) to g=
et
> >> a stack trace to find where the panic happened. =20
> >
> >drm-*-kmod probably needs a rebuild. Likely a data structure changed. In=
 my=20
> >experience a simple rebuild of the port solves 90% of drm-*-kmod crash=20
> >problems.
> > =20
> Hi Cy,
>=20
> sorry I didn't mention that, but I did rebuild drm-kmod, I actually do it=
 after every new kernel build, just to be on the safe side.
>=20
> I switched my swap to non-encrypted and will look if I can get any inform=
ation from the kernel dump tomorrow.
>=20
> Oh, and it's on a Thinkpad X1 Yoga 3rd gen, I just noticed I didn't menti=
on this.

It may be worth trying drm-515-kmod as some MFC that works with 515 and
not 510 may have been committed. Linux-KPI commits are the usual
suspects.

I use drm-515 with 14-CURRENT.


--=20
Cheers,
Cy Schubert <Cy.Schubert@cschubert.com>
FreeBSD UNIX:  <cy@FreeBSD.org>   Web:  https://FreeBSD.org
NTP:           <cy@nwtime.org>    Web:  https://nwtime.org

			e^(i*pi)+1=3D0



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