[Guide] Laptop backlight control using AppleBacklightFixup.kext

[seekerpl]

But no change in the brightness level to correspond?
If so, try patching EDID as per post #1 (your ioreg shows you have not).

Tried to patch EDID. After restart strange colors on the screen (see screnshot). Still no brightness control, it starts to work after waking PC from sleep.

 

[luka31101996]

Do i need XCode for doing this?

 

[crazeeyus]

Thank you for this wonderful guide!!

 

[iLuigi]

Read post #1, "Problem Reporting".

Finally made it work! Just following very carefully the guide in every step, I actually need to create a new DSDT with just the really needed patch and now works!

But the function keys don’t work well, I press just once and the slider goes to maximum or minimum and don’t work again until boot or wake after sleep.

And now I experiment issues with sleep when the wifi dongle is conected

 

[luka31101996]

I got brightness but now I have graphics flickering...What to do?

 

[iLuigi]

I got brightness but now I have graphics flickering...What to do?

I don't know ur laptop aspects but i have a HD4000 and have flickering and weird stuff at screen in every update until I applied a clover patch from this post https://www.tonymacx86.com/threads/dell-latitude-3330-intel-hd-4000-glitches-noise-artifacts.181844/

is the only thing to work and work really well.

 

[luka31101996]

I posted zip file so if anyone can check what is wrong now, graphics is flickering after this procedure of brightness fixing

 

[luka31101996]

I don't know ur laptop aspects but i have a HD4000 and have flickering and weird stuff at screen in every update until I applied a clover patch from this post https://www.tonymacx86.com/threads/dell-latitude-3330-intel-hd-4000-glitches-noise-artifacts.181844/

is the only thing to work and work really well.

how to do it? Can you explain to me in short way

 

[iLuigi]

how to do it? Can you explain to me in short way

Added this to my Clover config.plist

<dict>
    <key>Comment</key>
    <string>HD4000 0x01660003 FrameBuffer 8 MB</string>
    <key>Name</key>
    <string>AppleIntelFramebufferCapri</string>
    <key>Find</key>
    <data>AwBmAQECBAIAAAAEAAAAAQ==</data>
    <key>Replace</key>
    <data>AwBmAQECBAIAAAAEAACAAA==</data>
</dict>

 

[luka31101996]

Added this to my Clover config.plist

<dict>
    <key>Comment</key>
    <string>HD4000 0x01660003 FrameBuffer 8 MB</string>
    <key>Name</key>
    <string>AppleIntelFramebufferCapri</string>
    <key>Find</key>
    <data>AwBmAQECBAIAAAAEAAAAAQ==</data>
    <key>Replace</key>
    <data>AwBmAQECBAIAAAAEAACAAA==</data>
</dict>

Didn't work for me