GUI is frozen at login

[cipherhat]

Hello, did you tried to click on the little engine icon and change from KDE to system x11 default and see if it works?
also you can try this, during booting enter recovery mode, after that log in as root and type
nano /etc/default/grub

go to the line GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" and add acpi=off at the end. so it will look like this GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi=off" it could be possible "splash" is missing but it should work anyway.
after this press CTRL+X then Y and Enter
type sudo update-grub and then reboot. let me know what happend.

code worked thanks but keyboard and mouse not working after login

To clarify...
+ boot to GUI login screen... works
+ type username and password... works
+ click Login .....works
+ after login keyboard and mouse ...hangs not working