Why EDID is not trustworthy for DPI

[Casey Dahlin]

On Tue, Oct 04, 2011 at 04:17:08PM -0400, Martin Langhoff wrote:
> For fedora users, as others have mentioned, perhaps a UI that lets
> users test a couple of possible dpi values might be useful (for those
> users so inclined). It does have to cross a good chunk of the stack to
> work well, and seems like a lot of work to get right; but the xrandr
> improvements are a start.
> 

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.

--CJD