• realbadat@programming.dev
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    6 months ago

    A few reasons:

    • Any conversion (including internally at the display) can result in colorspace mismatches.
    • If the sink has an unsupported mode, the source will send a default - which is usually a mismatch.

    I wouldn’t call it often wrong, personally. I’d say some devices are really bad with EDIDs, and are consistently problematic. It’s more like -recent hardware is generally pretty good, but relying entirely on EDID won’t always work, so use with care.

    Some great examples of problematic devices/situations (in general):

    • Apple. Pretty much anything they make.
    • DP to HDMI - while DP supports HDMI natively, that can be one of the situations where EDID issues crop up. But much less often than…
    • DVI to HDMI or vice versa - this is probably the most problematic of general use. Happens somewhat often where a different or default colorspace gets used.

    If you’ve got a single PC going to a display (or several), just set it once manually and you’re good to go. If you’re plugging and unplugging often with multiple devices (like with a dock), an EDID minder can be handy, but come with a price that generally makes setting it manually preferred anyway.

    Hope this helps answer for you