Hello Szopin
Wifi settings are not lost, it's just by default saved for a given mac which gets randomized on each reboot, in NetworkManager settings for the connection manually clear the field 'Restrict to device' and it should automatically connect after reboot
Thanks a lot - works.
Also, if someone would like to get rid of the Kwallet -> installl kwalletmanager -> then you will have a new item in your system preferences about the user account -> there you can deactivate KWallet (and then uninstall kwalletmanager :-) )
Concerning the non-english keyboard layout:
sudo nano /etc/X11/xorg.conf
paste inside (for a german-de cosmo):
Section "InputClass"
Identifier "keyboard"
MatchIsKeyboard "yes"
Option "XkbLayout" "de"
Option "XkbVariant" "planetcosmo"
EndSection
reboot
smile