Jerone, I share your emotions about fixing this bug, because I''ve seen
a lot of instances of ubuntu showing the wrong resolution for both CRT
and LCD displays. Other debian based linux distributions (such as
knoppix) actually used get-edit|parse-edid to generate X configuration
Monitor section, which seems to be better way to generate it than
ddprobe, since it uses the monitors own information about the
recommended resolution.

Current Xorg server (I'm using git version, but i guess 1.3 also works)
has functionality for getting edid info by itself. It works for me if
don't enter any monitor specific information  in the Xorg.conf monitor
section, so that it looks like this:

Section "Monitor"
    Identifier    "Generic Monitor"
    Option        "DPMS"
EndSection

 If it doesn't work, it may be that your monitor is sending data with an
invalid DDC checksum, but otherwise correct. If it doesn't work, please
send the output from the get-edid command (this is in the read-edid
package) to xorg list and to this bug. get-edit > SM243T.edid, because
we're trying to work out how to deal with bad checksum, but otherwise
good edid info.

-- 
Problems with xresprobe & Samsung 243T LCD
https://bugs.launchpad.net/bugs/27667
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