https://bugs.kde.org/show_bug.cgi?id=478616

--- Comment #5 from Stefan Hoffmeister <stefan.hoffmeis...@econos.de> ---
Right now it is a lottery game whether I get to the sddm prompt, without
""kwin_core: Failed to open /dev/dri/card0 device (Did not receive a reply. "

Some findings:
* Intel firmware (removing the non-default `guc=3`) does not make a difference
* only with KWIN_DRM_DEVICES=/dev/drm/card0 for sddm do I get the change to
switch to a console (Ctrl+Alt+F4), so this option is back on, as on this
notebook I never want to have the NVIDIA GPU (card1) drive the graphical login
* `reboot` from the console ends up in the graphics stack again, so never
reboots successfully; I have to use ACPI power down (hold power button for 10
seconds) to force shutdown

Just for laughs, I have now set selinux policy from enforcing to permissive
("/etc/selinux/config"). The boot after doing that worked (and I am writing
this from a working session).

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