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-xconfig-video-intel latest version only supports nvidia-current-updates and nvidia-settings-updates instead of
nvidia-current and nvidia-settings !

I think my driver is Intel as:
I also upgraded my KUBUNTU 11.1, I don't know how I solve this problem, I tried different ways, I think the last option is to try installing BumbleBee

you got any idea?

probably here you can find some interesting tips

Negative,if it was as simple as this, I wouldn't spend 2 days trying different solutions :d.

I also installed xserver-xconfig-video-intel and intel-dbkg packages from package manager. Moreover, I tried running jockey-gtk, though it cannot see any proprietary graphic driver!
I don't think the problem is the intel card driver as it is installed already. I does pop up normally in recovery mode, as a standard library is used for it.
but in generic linux it is reversed n upside down.
here:

this shows the suitable driver for this is

i915, the intel driver.

so what is the problem, as anyone faced this problem before?