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README-Intel-Graphics.md

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Intel Graphics

Sources

Workarounds for graphics failures after booting with two displays

  • boot with the first display connected, connect the second after the login window has presented
  • boot with both displays connnected, it is then necessary to reconnect the display(s)

WhateverGreen.kext

Boot arguments

  • igfxfw=2 optionally forces WEG to load Apple's graphics microcode (GuC)

Device Properties

Some WhateverGreen.kext device properties not mentioned in README.md

  • framebuffer-unifiedmem optionally increases the unified memory limit from 1.5G to 2G
  • force-online and force-online-framebuffers works around HDMI black screen issues after waking from sleep
...
<key>DeviceProperties</key>
<dict>
    <key>Add</key>
    <dict>
        ...
        <key>PciRoot(0x0)/Pci(0x2,0x0)</key>
        <dict>
            ...
            <key>framebuffer-unifiedmem</key>
            <data>AAAAgA==</data>
            ...
            <key>force-online</key>
            <data>AQAAAA==</data>
            <key>force-online-framebuffers</key>
            <data>Af////////8=</data>
            ....
        </dict>
        ...
    </dict>
</dict>
...