image size is wrong in EDID, how to use EDID quirks

Adam Jackson ajax at
Fri Sep 13 16:47:39 UTC 2019

On Fri, 2019-09-13 at 04:21 +0000, zhangn1985 at wrote:
> Dear developers
> I have a Samsung 40’ HDMI TV, which has wrong EDID.
> The actaul size of this TV is 40’ (88cm*49cm), but in EDID the size
> is 49’ (106*63cm)
> Thus makes image size is larger than screen, both in console and
> desktop.

That's not how EDID works in Linux. It's only used to compute the DPI
of the screen, not to scale the image. If the image on the TV looks
like it extends off the edge of the TV you need to find the "overscan"
setting in your TV and turn it off.

- ajax

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