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
--
Screen Resolution/Hz wrong
https://launchpad.net/bugs/63063
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