Why EDID is not trustworthy for DPI

[Matthew Garrett]

On Wed, Oct 05, 2011 at 01:34:43PM -0700, Adam Williamson wrote:

> I'm just saying it would probably pay off to put some thought *now* into
> how to manage things when higher resolution displays become so prevalent
> that they can't be ignored, rather than desperately scrambling to catch
> up when you eventually realize it's happened.

The likely outcome of higher density displays is that default font sizes 
will get larger. It's a problem if and only if it's common to use 
multiple displays of grossly different density, and fixing that problem 
is impossible unless we have a huge number of technical advances that 
nobody's even working on right now. It's worth thinking about. It's just 
not something that we're anywhere near being able to implement, and as 
such it's pretty unrelated to the original observation which is that 
trusting EDID right now will just get you burned.

-- 
Matthew Garrett | mjg59 at srcf.ucam.org