Comment 11 for bug 63063

Thanks

It could be bug 79064.

From Xorg.0.log the X server can't find your monitor type with DDC.

As a workaround.
from a console try:
sudo dpkg-reconfigure -phigh xserver-xorg
and restart X
you should have something like
Section "Monitor"
 Identifier "COMPAQ MV700"
 Option "DPMS"
        HorizSync 30-70
        VertRefresh 50-100
EndSection

If it doesn't work then it's a xresprobe, dexconf bug and add
the missing lines
        HorizSync 30-70
        VertRefresh 50-100