white screen when Effects are enabled !!!

[user]

Hello
I enabled Effects then screen white and only show Mouse courser. after Reboot and login , i see again white screen.
How do I cancel settings?

[ram88]

@navidz

Hello
I enabled Effects then screen white and only show Mouse courser. after Reboot and login , i see again white screen.
How do I cancel settings?

1. At the login screen from the Session Type menu select the KDE failsafe option. Log in, and switch off the effects, and re-log with the default KDE session.
2. If you have auto-login, then after the screen goes white, hit CTRL + ALT + (Backspace x 2), and do 1.