Hi, sorry for my english.
I install Yosemite 10.10 on laptop:
Intel Pentium B960 / 2.2Ghz Dual-Core
2011 Intel HD Graphics
Post-Instalation I Used MultiBeast...
Only boot at -x (safeboot)... when i go to boot normally the graphics are distortion... I test boot on -v to see any error on code and are successful...
I have another installation of Maverick and i don't have problem... I don't now what happen on Yosemite,