Information with MacPro 2010 and Apple Studio Display

Hello...a information, I hope that you can help me and can resolve...

When a I have buy, turn on macpro, on apple studio display start in a regular manner without interventions....

And now, after install/update MAC OS X MOUNTAIN LION, there is one strange thing is, turn on, on apple studio display, after start a logo APPLE, the display turn off and appears the desktop, why?

See this video

http://www.zuddasdesign.com/IMG_0120.MOV

Because, yesterday I was on APPLE STORE, I have see every notebook and iMac that turn off and re-turn on, the display start in a regular manner, after LOGO, desappears LOGO and start smoothly starting from trasparent to ICON anche password for log-in operation system..

Why?

How i can resolved this a stupidity display?