Xorg hang with "No Signal" on screen after incomplete -Syu

Question

Hello everyone.
I had a uptime of ~60 days and decided it was the time to pop -Syu and take a deep breath, this time, it choked me ..
pacman -Syu was downloading almost a Gig of packages and was near the end or just started installing when the screen just got cleared suddently and showed me this ..
1888218888++++++++
Yes, nonsense, something went terribly wrong, and I did not use it meanwhile updating, it was just updating all by itself when this happened..
Afterwards I did another pacman -Syu after a reboot and it installed the last packages but startx gave me a screen without signal (No black screen or anything, just like if it was unplugged) .. The rest of the system is freezed and I cannot reach TTYs by CTRL+ALT+F-keys absolutely no response, not even by network services like SSH.
I now am in doubt, should I do a reinstall of all packages on my system to be sure this is not caused by incomplete installations/upgrades of xorg and it's parts or should I try anything else?
xinit/startx is reacting the same ..
I have not been able to find a similar problem by searching, all refer to the Xorg hotplugging which is disabled in my Xorg which bugged me on the last -Syu ..

Answer 1

UPDATE:
The official NVIDIA driver caused the problem since the "nv" opensource nvidia driver works fine.
[dezza@dezza ~]$ sudo pacman -Qii nvidia
Name : nvidia
Version : 180.22-1
URL : http://www.nvidia.com/
Licenses : custom
Groups : None
Provides : None
Depends On : kernel26>=2.6.28 kernel26<2.6.29 nvidia-utils
Optional Deps : None
Required By : None
Conflicts With : nvidia-96xx nvidia-71xx nvidia-legacy
Replaces : None
Installed Size : 7744,00 K
Packager : Pierre Schmitz <[email protected]>
Architecture : i686
Build Date : 2009-01-12T13:46:07 CET
Install Date : 2009-02-25T13:24:55 CET
Install Reason : Explicitly installed
Install Script : Yes
Description : NVIDIA drivers for kernel26.
Backup Files:
(none)