upside-down reversed desktop

view story

http://www.unix.com – I got some problem at startup before login such screen splashing, startup blocking on "checking battery status" and screen going black. Now, that I've solved the above problems I see the desktop screen is upside-down n reversed as well. I tried re-installing nvidia-current, re-installing kubuntu-desktop, checking if xserver-xconfig-video-intel is installed (it is), installing lightdm, setting gdm as default, but, none of them worked out. Still I got the same problem. Maybe, xserver-xconfig-video-intel and nvidia-current conflict n I should remove nvidia-current? or maybe xserver-xc (HowTos)