Have you already done a distro-sync
just done, no change
or tried uninstalling sddm before trying
startx? KDM still works
not yet, should I just do this?
$ dnf remove ssdm*
$ dnf install kdm
Have you already tried uninstalling the nouveau driver?
should I do this?
$ dnf remove nouveau*
If nothing else has helped as yet, provide hardware information:
Here some first information:
laptop DELL XPS15 9550
$ lspci -nnk|grep -A5 VGA
0:02.0 VGA compatible controller [0300]: Intel Corporation HD Graphics
530 [8086:191b] (rev 06)
Subsystem: Dell Device [1028:06e4]
Kernel driver in use: i915
Kernel modules: i915
00:04.0 Signal processing controller [1180]: Intel Corporation Skylake
Processor Thermal Subsystem [8086:1903] (rev 07)
Subsystem: Dell Device [1028:06e4]