Comment # 10 on bug 1188954 from Felix Miata

Created attachment 851529 [details]
Xorg.0.log.old; journalctl -b; dmesg; Xorg.0.log

I have 15.3 freshly updated on an old GeForce PC doing essentially the same
thing. On boot, X fails to start. After login and systemctl restart xdm,
normalcy begins. Booting older kernels is no help. Switching from TDM to XDM
directly using update-alternatives --configure default-displaymanager didn't
help either.

# inxi -CSy
System:
  Host: g5eas Kernel: 5.3.18-59.16-default x86_64 bits: 64 Desktop: Trinity
  Distro: openSUSE Leap 15.3
CPU:
  Info: Single Core model: Intel Pentium 4 bits: 64 type: MT cache: L2: 2 MiB
  Speed: 3200 MHz min/max: N/A Core speeds (MHz): 1: 3200 2: 3200
# inxi -Gayz
Graphics:
  Device-1: XGI Z7/Z9 vendor: Gigabyte driver: N/A bus-ID: 0a:03.0
  chip-ID: 18ca:0020 class-ID: 0300
  Device-2: NVIDIA G98 [GeForce 8400 GS Rev. 2] vendor: PNY driver: nouveau
  v: kernel bus-ID: 0b:00.0 chip-ID: 10de:06e4 class-ID: 0300
  Display: x11 server: X.Org 1.20.3 driver: loaded: modesetting
  unloaded: fbdev,vesa alternate: nouveau,nv,nvidia display-ID: :0 screens: 1
  Screen-1: 0 s-res: 1920x1200 s-dpi: 120 s-size: 406x254mm (16.0x10.0")
  s-diag: 479mm (18.9")
  Monitor-1: DVI-I-1 res: 1920x1200 hz: 60 dpi: 94
  size: 519x324mm (20.4x12.8") diag: 612mm (24.1")
  OpenGL: renderer: NV98 v: 3.3 Mesa 20.2.4 direct render: Yes
#
Note that there is no way via PC BIOS to make the on the motherboard XGI GPU
disappear.

I found all this out after trying to reproduce this on NVidia with TW20210803
on this PC, but since today's zypper dup, it refuses to mount / RW until I
login and execute mount -o remount,rw /.