Why EDID is not trustworthy for DPI

Jeff MacDonald jam at zoidtechnologies.com
Wed Oct 5 12:34:44 UTC 2011

On Tuesday, October 04, 2011 10:08:33 PM Adam Williamson wrote:
> > Windows used to have a gui that would show a ruler on your monitor and
> > say "hold a real ruler up to this and slide the slider until its the
> > same size." Given what's been said about how windows handles DPI I can
> > only wonder what it did, but it might be a nice thing to have.
> I think it was more some specific app that did that, wasn't it? I'm
> almost sure it was either Paint Shop Pro or the GIMP, because obviously,
> actual physical accuracy is quite important there. Otherwise it was
> something like Office. It was definitely some specific app where WYSIWYG
> was important, not an OS.

It makes sense to do that when configuring a desktop environment like Gnome or 


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