Strange green bottom horizontal line appears when playing MKV movies

1st Official Post

    Hi,

    My setup: LibreElec 8.x (Generic) with Kodi 17.6.

    Problem:

    I have a weird visual display issue when playing an .MKV movie files: on the bottom of the video there's a thin (say 1-2 pixels on height) full screen width green horizontal line constantly visible when playing an MKV in Kodi. Notice: The green line ain't visible when I play the same MKV e.g. in VLC on my Windows laptop. What could cause such a strange and visually disturbing effect?

    The video sources are a blu-ray/dvd's (display ratio 2.39:1 / 16x9) > produced an MKV with MakeMKV (latest; no green line visible) and encoded with HandBrake (latest; no green line visible on VLC/Windows).

    Seems that the "green line effect" appears in all (well 90%) of my existing MKV's when I start playing. My LE / Kodi software hasn't changed, but some HW has changed: TV (Sony XF9005) and A/V receiver (Yamaha RX-v685). Could it have something to do with in LE/Kodi:

    - video player accelerators?

    - refresh rate (currently 60hz)?

    - something else?

    I'm very confused where to start looking for fix - help highly appreciated :)

    //timo

    • Official Post

    No need for 'help' in your forum thread title. It's not really helpful. We try to help everyone with LibreELEC-related issues.

    As far as your LibreELEC device goes:

    Please provide a full debug log.

    How to post a log (wiki)

    1. Enable debugging in Settings>System Settings>Logging
    2. Restart Kodi
    3. Replicate the problem
    4. Generate a log URL (do not post/upload logs to the forum)

    use "Settings > LibreELEC > System > Paste system logs" or run "pastekodi" over SSH, then post the URL link

    In short:

    - the bottom green line does NOT appear when playing the MKV in VLC (latest official release) on Windows 10

    - the bottom green line APPEARS when playing the MKV in LE 8.x / Kodi 17.6 (no changes in LE / Kodi environment)

    I am all "?????" what could cause this.


    Could it have something (what?) to do with Kodi/LE display settings (frequency?) or something?

    //timo

    Edited once, last by tjsuominen (March 4, 2019 at 8:00 AM).