Comment 15 for bug 1763977

syslog adds :

Apr 21 22:36:32 wopr sddm[1618]: Loading theme configuration from ""
Apr 21 22:36:32 wopr sddm[1618]: Display server starting...
Apr 21 22:36:32 wopr sddm[1618]: Running: /usr/bin/X -nolisten tcp -auth /var/run/sddm/{32721ea1-fe7f-40f7-adfb-e12021f0311c} -background none -noreset -displayfd 18 -seat seat0 vt1
Apr 21 22:36:32 wopr sddm[1618]: Display server failed to start. Exiting
Apr 21 22:36:32 wopr systemd[1]: sddm.service: Main process exited, code=dumped, status=6/ABRT

Xorg.1.log adds :

[ 28.693] (WW) Falling back to old probe method for modesetting
[ 28.693] (II) modeset(1): using default device
[ 28.693] (II) Loading sub module "fbdevhw"
[ 28.693] (II) LoadModule: "fbdevhw"
[ 28.693] (II) Loading /usr/lib/xorg/modules/libfbdevhw.so
[ 28.693] (II) Module fbdevhw: vendor="X.Org Foundation"
[ 28.693] compiled for 1.19.6, module version = 0.0.2
[ 28.693] ABI class: X.Org Video Driver, version 23.0
[ 28.693] (**) FBDEV(2): claimed PCI slot 0@0:2:0
[ 28.693] (II) FBDEV(2): using default device
[ 28.693] (WW) Falling back to old probe method for vesa
[ 28.693] (EE) Screen 0 deleted because of no matching config section.
[ 28.693] (II) UnloadModule: "modesetting"
[ 28.693] (EE)
Fatal server error:
[ 28.693] (EE) Cannot run in framebuffer mode. Please specify busIDs for all framebuffer devices
[ 28.693] (EE)
[ 28.693] (EE)
Please consult the The X.Org Foundation support
         at http://wiki.x.org
 for help.
[ 28.693] (EE) Please also check the log file at "/var/log/Xorg.1.log" for additional information.
[ 28.693] (EE)
[ 28.714] (EE) Server terminated with error (1). Closing log file.