screensaver don't work in KDE after deactivate show tooltips

[cameta]

System settings--->Workspace Behaviour---->Workspace
Global options for the Plasma Workspace
Show informational tips
after touching that box and a logout the screensaver stops working irreversibly and the screen only shows the Elarun background.
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Si algo falla LEE el jodido manual, Si sigue fallando LEE BIEN el jodido manual.