(In reply to Michel D=C3=A4nzer from comment #27)
> (In reply to Alan W. Irwin from comment #26)
> > Debian Jessie =3D oldstable had debug packages for libgl1-mesa-dr=
i, but I
> > can find nothing equivalent for Debian Stretch
>=20
> Debugging symbol packages are in a separate repository now, add this to
> /etc/apt/sources.list:
>=20
> deb	https://deb.debia=
n.org/debian-debug/	<suite>-debug	main contrib non-free
>=20
> (Replace <suite> with the suite name you have for the main repos=
itory there)

Thanks for that Debian Buster help concerning debug symbols.  As a result I=
 now
have libgl1-mesa-dri-dbgsym installed just in case I run into this segfault
again.

> > Is there any further follow up you can reco=
mmend for the NMI-related error
> > messages for the latest kernel lockup?
>=20
> Looks e1000e network driver related.

So this appears to be a side issue from the much more frequent lockups I te=
nd
to get whenever I am using the RX 550 card.  So it is off-topic for the cur=
rent
bug report, but thanks for helping me to determine that by your classificat=
ion
of this particular source of kernel-4.18.x lockups for my now 5 months old =
and
still not stable Linux box.

Anyhow, I will continue the present stability experiment to see how far I g=
et
before the next lockup.