re-probing DDC/EDID

[perryh at pluto.rain.com]

Robert Noland <rnoland at FreeBSD.org> wrote:

> > * Running "xrandr -q".  I previously provided the output from having
> >   done so, noting that it appeared to be reporting the monitor info
> >   pertaining to the older monitor -- thus presumably cached at
> >   startup -- rather than anything which might have been produced
> >   by rerunning the probe after I had switched to the new monitor.
> >   There are at least three resolutions provided by the new monitor
> >   which are not in the "xrandr -q" report, and two of them (720x400
> >   and 640x350) are smaller than the old maximum of 1280x1024 and thus
> >   presumably should not have been suppressed based on being too large
> >   to be usable by the currently-running server.  Furthermore, the
> >   342mm x 271mm screen dimensions reported by "xrandr -q" are those
> >   of the old monitor; the new one is about 517mm x 324mm.
>
> Watch xorg.log while running xrandr -q.  If you have a virtual set
> large enough to display the new larger mode then it will show up...

A "tail -f" on /var/log/Xorg.0.log showed nothing while running
"xrandr -q" in a different xterm.