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Thread: 4K Tiled Displays Become An Issue With X.Org

  1. #1
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    Default 4K Tiled Displays Become An Issue With X.Org

    Phoronix: 4K Tiled Displays Become An Issue With X.Org

    Aaron Plattner of NVIDIA has laid out the latest problem in the X.Org world: how to deal with 4K tiled displays that show themselves to the PC as two displays...

    http://www.phoronix.com/vr.php?view=MTU3NDU

  2. #2
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    Quote Originally Posted by phoronix View Post
    Phoronix: 4K Tiled Displays Become An Issue With X.Org

    Aaron Plattner of NVIDIA has laid out the latest problem in the X.Org world: how to deal with 4K tiled displays that show themselves to the PC as two displays...

    http://www.phoronix.com/vr.php?view=MTU3NDU

    Kind of stupid to have to correct HW design decision in software. At least at this level.

  3. #3
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    tl;dr X.org sucks anyway, does Wayland solve this issue?

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    Are there so many 4K display users (on Linux) that this really needs to be an issue?

  5. #5
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    X.org should treat them as one display so that normal programs functions
    as expected. For programs that would like to use them in a special way,
    information should be provided in a non breaking way.

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    Quote Originally Posted by Vistaus View Post
    Are there so many 4K display users (on Linux) that this really needs to be an issue?
    With prices below 1K it will become an issue sooner or later. Or at least it will be one until they start making monitors that behave like a single one.

  7. #7
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    Quote Originally Posted by mark45 View Post
    tl;dr X.org sucks anyway, does Wayland solve this issue?
    Thank you for having a strong opinion, but no clue about the subject at hand.

    Treating two separate displays as a single display must be solved in each display server separately.

    Ideally, it would be solved in KMS so it'd just work everywhere, but it'd be non-trivial to configure there in case you wish to keep them separate. The kernel command line isn't really userfriendly.

  8. #8
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    Quote Originally Posted by 89c51 View Post
    Kind of stupid to have to correct HW design decision in software. At least at this level.
    The problem is bandwidth. It's also why many 4K displays refresh at 30Hz instead of 60Hz.

  9. #9
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    Quote Originally Posted by ctwise View Post
    The problem is bandwidth. It's also why many 4K displays refresh at 30Hz instead of 60Hz.
    Then they should have fixed the bandwidth issue before moving ahead with the displays.

  10. #10
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    Quote Originally Posted by KellyClowers View Post
    Then they should have fixed the bandwidth issue before moving ahead with the displays.
    DisplayPort 1.2 did fix the bandwidth issue. This Dell monitor shows up as two monitors over a single cable when it could easily show up as one monitor over a single cable.

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