NUC / Core i5 8250U (Kaby Lake Refresh) / UHD 620 / No 4K on HDMI output

[lorenzolamasse]

Hi all,

 

I'm almost there on this config:

- Intel Core i5 8250U

- Ethernet: RTL8111 (working)

- Audio ALC892 (working)

- HDMI+VGA outputs (working, even HDMI audio)

 

Only thing missing is 4K on HDMI output, for some reason my LG TV is detected as 1080p only, though when booting on a Live Ubuntu I have 4K on the same unit.

Any clue ? Should I dig for EDID injection or some similar stuff ?

Here is the device-property area of my config.plist:

<key>Add</key>
        <dict>
            <key>PciRoot(0x0)/Pci(0x1b,0x0)</key>
            <dict>
                <key>layout-id</key>
                <data>AQAAAA==</data>
            </dict>
            <key>PciRoot(0x0)/Pci(0x2,0x0)</key>
            <dict>
                <key>AAPL,ig-platform-id</key>
                <data>AAAWWQ==</data>
                <key>framebuffer-patch-enable</key>
                <data>AQAAAA==</data>
                <key>framebuffer-stolenmem</key>
                <data>AAAwAQ==</data>
                <key>device-id</key>
                <data>FlkAAA==</data>
                <key>framebuffer-fbmem</key>
                <data>AACQAA==</data>
                <key>framebuffer-unifiedmem</key>
                <data>AAAAgA==</data>
                <key>framebuffer-con1-enable</key>
                <data>AQAAAA==</data>
                <key>framebuffer-con1-alldata</key>
                <data>AgQJAAAIAADHAwAA</data>
            </dict>

I'm running Lilu 1.4.2 and WhateverGreen 1.3.7

I have testes Switchres, but 4K res does not show, and max proposed resolution is 2560x1440 but it looks scaled from 1080p.

Any help appreciated, if I need to provide more info please let me know.

Lorenzo

Edited March 18, 2020 by lorenzolamasse