[PATCH] drm/radeon/kms: disable underscan by default

Rafał Miłecki zajec5 at gmail.com
Sun Jan 9 17:07:01 PST 2011

2011/1/5 Alex Deucher <alexdeucher at gmail.com>:
> Lots of HDMI TVs overscan the incoming image by default.
> The underscan option was added as a way to compensate for
> that by underscanning the image so that the edges would
> not be cut off on an overscanning TV.  However, the TV
> provides no way of knowing whether it is overscanning or
> not.  If the user has disabled overscan on their TV or has a
> TV that does not overscan, you will get black bars around the
> edges of your screen.  Prior to the patch we got complaints
> and bug reports from users with overscanning TVs, now with
> the patch, we get lots of complaints and bug reports from
> users with non-overscanning TVs.  There's no good default,
> but on average there have been more users complaining about
> it being on by default than off, so change it to off.  This
> will probably result in a new deluge of overscanning TV user
> complaints.  There's no winning.

Thanks a lot for this patch! I really believe future TVs will be
no-overscanning oriented and that's right choice for radeon.


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