Hi,
  this a call for help. :-)

The history goes like this, I have updated to F43 and all was working normally 
for more than one week.


On the first of September, when booting I got black screen after booting. No 
key worked with the exception of the power key that would trigger a controlled 
shutdown.

FWIW at this stage I was running sddm (as the display manager) and then 
running plasma.

After some attempts I have entered in single mode. I have disabled sddm and I 
have enabled gdm as the default display manager.

Unlike sddm, gdm worked but only worked for the gnome variants, not plasma.

The situation was not ideal, I prefer plasma, but I could certainly work on a 
graphical way.


Then last Saturday, after an update and the following reboot, gdm no longer 
works. It flashes several times and crashes. But now, unlike the case with 
sddm, I have the tty's available.

I have installed lightdm, and since neither gnome or kde plasma would work, I 
have also installed xfce. I can run xfce.

I have also found out, that most of the time, if I login into gnome (from 
lightdm) that flashes and crashes, restart lightdm and the login into plasma 
it works.

FWIW `dnf check` comes empty.

What should I check to find the culprit?
Could this be hardware related?

Best regards,
-- 
José Abílio Matos
-- 
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