[Bug 105331] Dithering doesn't work on HD4600 when using DP

bugzilla-daemon at bugzilla.kernel.org bugzilla-daemon at bugzilla.kernel.org
Tue Mar 22 08:49:48 UTC 2016


https://bugzilla.kernel.org/show_bug.cgi?id=105331

--- Comment #11 from Jani Nikula <jani.nikula at intel.com> ---
(In reply to Mario Kleiner from comment #10)
> I haven't tested this yet, but doesn't this change degrade any DVI or analog
> VGA display to 6 bpc/18 bpp if it is connected to DisplayPort via a DP->DVI
> or DP->VGA adapter?

That depends on whether the displays have EDID 1.4 and advertise a sink
capability higher than 18 bpp or not.

I presume the spec was written this way to avoid black screens, and to a large
part that's the main priority we have too.

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