Created attachment 143700 [details]
dmesg output, kernel configuration file, lspci, and Xorg.0.log respectively.
Ahoy!
It looks like amdgpu is having an "Oops" when initializing with K=
ernels 5.0.0
and later on Linux PPC64 (Little Endian) platforms, right as it tries to lo=
ad
amdgpu.=20
In the attached dmesg it looks like it starts around here:=20
[ 34.247578] Oops: Kernel access of bad area, sig: 7 [#1]
I came to notice this bug when I upgraded the kernel from 4.20.11 on Gentoo=
and
4.20.1 on Debian and rebooted, then trying to bring up xfce4 would hang. Th=
is
even causes Gentoo to hang on shutdown when / cannot be unmounted and requi=
res
a hard poweroff, even if I attempt to kill the process starting xfce4.=20
I tried it with both 5.0.0 and 5.0.2 on Gentoo, after upgrading from 4.20.1=
1,
and got similar results: when I enter "startxfce4" at the prompt,=
xorg hangs.=20
I'm attaching my dmesg, kernel configuration file, the output of lspci, and=
the
xorg.0.log in that order. The xorg.0.log file is only 48 lines long, and ha=
sn't
been truncated, that's all that's in it. Currently the only way to work aro=
und
this is for me to use an older kernel. I can post the dmesg from 4.20.11 (t=
he
last kernel I had that worked) if it's required.