Why EDID is not trustworthy for DPI

Simo Sorce simo at redhat.com
Thu Oct 6 17:14:05 UTC 2011

On Thu, 2011-10-06 at 17:12 +0100, Matthew Garrett wrote:
> On Thu, Oct 06, 2011 at 12:00:36PM -0400, Simo Sorce wrote:
> > So in that case you really should just give an option to the user to
> > easily change DPI (no need to call the option 'DPIs', it can be a slider
> > with no mention of DPI if you prefer) *if* it is needed.
> > Chances are that a much wider font resulting from high density primary
> > display derived DPI number combined with low resolution video projector
> > screen will show big fonts and that will happen to be *exactly* what you
> > want so the guy back there at the end of the room has a chance to
> > actually read something :)
> I absolutely agree that there should be an easy mechanism to globally 
> change font size. But I don't think tying it to DPI is helpful.

Sure call it the way you prefer, does need to be DPI necessarily, but
the concept of DPI would give a clue to all apps about what they are
asked to do, whether it is font or some other rendering.


Simo Sorce * Red Hat, Inc * New York

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