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Skylake HDMI 2.0 question

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01 Staff's picture
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01 Staff (not verified)

Nov 12, 2015 - 02:42pm

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    perigvennetier's picture
    perigvennetier (not verified)

    I currently cannot display UHD 60fps on HMDI 2.0 from my Asus Fatal1ty Z170 Gaming MB (http://www.asrock.com/mb/Intel/Fatal1ty%20Z170%20Gaming-ITXac/)

     

    It am able to output UHD 30fps so far.

     

    I am running kernel v4.4.2 (Linux test-desktop 4.4.2-040402-generic #201602171633 SMP Wed Feb 17 21:35:10 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux)

     

    The latest version of the Intel Graphics Drivers cannot be installed due to an issue with the GPG signature so I am waiting for this to be fixed to check if the newer driver would allow the 60fps for UHD on HMDI 2.0.

     

     

    Feb 22, 2016 - 04:00pm
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    michaelheimann's picture
    michaelheimann (not verified)

    Hi Perig!

     

    I have the same Mainboard (Asrock Fatal1ty Z170 Gaming-ITX/ac) and had quite some fight to get video out to work. With 4K@60Hz I have an unusable image (flickering, more blackscreen than actual content - unusable). I've now set res to 1080p and wait for driver improvements.

    Do you get the 4K @30Hz on the HDMI2.0 or HDMI1.4 connector? Is it usable/flickerfree?

     

    I think I had also trouble with 30Hz but don't remember and am away from my HTPC right now...

     

    I'm curious because I cannot get anything on the HDMI 1.4 connector (above DP) - always "no signal" - even at 720p or lower. The connector only works until Grub. After that - nothing.

     

    Well. seems like early adopters are forced to be patient sometimes...

     

    Cheers,

    Michael

     

     

     

     

    Feb 29, 2016 - 02:47am
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    michaelheimann's picture
    michaelheimann (not verified)

    Hi all,

     

    Small Update from here:

     

    I've discovered that enabling HDMI ULTRA HD DEEP COLOR Option on my LG TV makes xrandr list the 60Hz.

     

    But: As long as that's enabled, I get 60Hz displayed, tv shows 60Hz input - but flickering destroys usability completely.

    Interesting side-note: neither 30Hz nor 23,98Hz work in 4K resolution with the HDMI ULTRA HD DEEP COLOR setting enabled.

     

     

    So I've the choice between 60Hz flickering and 30Hz - how ironic.

     

    without ultra hd deep color
     
    with ultra hd deep color
     
    kernel is 4.5 intel-next from ubuntu kernel repos installed on a steamos brewmaster.base.
    For now I live with 30Hz - movies are ~24Hz anyways and since 60Hz is unusable with that flicker ....
    Mar 29, 2016 - 07:45pm
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