is 120hz supported?

1st Official Post

    I'm not a noob, I'm not talking about smooth motion bulshit or fake 1030400hz crap they sell, my TV does real, 120hz @ 1920x1080. For real, hence why I asked. For Windows and games, it is smoother than you can imagine.

    Really any device than can do 4k@30fps can do 1080p@120fps. GPU don't care about what resolution, they care about their pixel clock and how many pixel's it can push. 4k@30fps is the same pixels at 1080@120.

    Edited once, last by GeToChKn (January 10, 2017 at 1:06 AM).

    Quote from ozolli


    Can you open a ssh terminal on your machine and provide us a "xrandr --verbose" output?

    I will when I get home. Be interested to see if the 905 can. I know for AMD I had to patch the drivers for the longest time until AMD finally added official 120hz support. Overwatch at 120fps at 39" is pretty awesome though. Lol

    Fyi for m tv it's a Seiko 39" 4k tv that has a hacked firmware flashed to allow 120hz so I am very sure it can do a true 120hz @1080

    • Official Post
    Quote from GeToChKn


    39" 4k tv

    How far away are you from the TV while you are watching? With 39" to get a real benefit from 4k, I would say max 1,5m. Is that correct?

    Just to make this clear. The human eye isn't able to see a difference from HD-ready (720p) to Full-HD on a 37" TV while you are 4m away. So it gets worse to notice that difference on such a little TV with FullHD and 4k. So I doubt you see a real difference if you are about 4m away from that.

    Quote from GeToChKn

    I will when I get home. Be interested to see if the 905 can.


    Well, I did not notice it's an amlogic device so there is no xrandr.
    It would be good to know the EDID modes list your TV offers to your amlogic device and see if there are 120Hz and 119.88Hz modes.
    But I don't know how to do on this device..

    Edited once, last by ozolli (January 10, 2017 at 5:07 PM).

    The closest equivalent command would be

    Code
    cat /sys/devices/virtual/amhdmitx/amhdmitx0/disp_cap

    To my knowledge, the amlogic kernel only supports resolutions and frequencies that are typically used for tvs. (i.e. vertical 480, 576, 720, 1080, 2160 @ 23.98, 24, maybe 25, 29.98, 30, 50, 59.98 and 60 Hz).
    [hr]
    Here is the result from my full HD tv:

    Edited once, last by mmpp (January 10, 2017 at 6:26 PM).

    Quote from GeToChKn


    I tried adding it to the disp_cap file, but it doesn't show, so probably not available. Was just a though. O well.

    Adding it where?
    Connect to your box with putty and run the following command, you'll get an output like mmpp posted.

    Code
    cat /sys/devices/virtual/amhdmitx/amhdmitx0/disp_cap

    You have to do that when the TV is on.

    Edited once, last by The Coolest (January 13, 2017 at 3:56 PM).

    480i60hz
    480p60hz
    480p_rpt
    576i50hz
    576p50hz
    576p_rpt
    720p60hz
    1080i60hz
    1080p60hz*
    720p50hz
    1080i50hz
    1080p50hz
    1080p24hz
    2160p30hz
    2160p25hz
    2160p24hz

    no 120hz listed there. I tried adding it manually but doesn't show up in the list, so probably not supported officially. With HDMI 2.0, enough bandwidth, but not officially supported it seems. I'll have to HDMI my PC back to my TV, see if Windows Kodi shows/supports it?

    The TV won't expose a 120Hz option, but you can add one manually.
    disp_cap_hack.zip
    I tried it and it works, I used it to see what my display would do when fed 50Hz signal, as it seems to block refresh rates not in the EDID with the latest firmware :(

    Copy your whole list to a new disp_cap file per instructions and add 1080p120hz in the list.