fedora 21 wont boot into graphical interface

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First boot after upgrade to FC-21 nonproduct all seamed ok. The next boot gave the graphical login screen and when loging-in from password page there is a pause with blank screen. Then there displaying three lines about cups and then it says plymonth waiting. Then the screen returns to the graphical log in page. later on the machine started showing the system text login screen. After loging using ctr+alt+f2 and loging in or loging in from text login yuo can type startx and every thing works normal until the next time you login.