Blackscreen at boot (poss display manager issues)

[filo]

I see that latte-dock is creating the dump.
I think you could give a look at this post:

Recurring issue with disappearing UI

psifidotos: Latte Dock v0.10.1 | Bug Fix Release says the proper way to autostart Latte If it persists then it is an applet that should be removed

But especially you should try adding a delay like here:

Trouble with boot

You have to try it, so you"ll find out. It's possible, but it depends... Also, the problem may just be that latte starts too early. There are cases that were fixed by adding a small delay in latte-dock start-up command. If you want to try, edit the latte command in KDE Settings => Autostart applications => Latte properties Prepend Command with sleep 3; (or higher number). Like this sleep 3 ; latte-dock