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[Guide] Patching DSDT/SSDT for LAPTOP backlight control

Joined
Jan 31, 2014
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Dell Inspiron 13 5368 - Clover UEFI
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i3-6100U
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HD 520, 1920x1080
The problem is still here, but is a little better, if I hold down one of the brightness keys, it will keep going. But if I press them fast, the problem appears.
 

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RehabMan

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The problem is still here, but is a little better, if I hold down one of the brightness keys, it will keep going. But if I press them fast, the problem appears.

No idea. May be BIOS problem (I wonder if same on Windows). You may have to debug further to find the cause ...
 
Joined
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32
Motherboard
Dell Inspiron 13 5368 - Clover UEFI
CPU
i3-6100U
Graphics
HD 520, 1920x1080
I didn't do any debugging, but I set a Custom PS2 Map entry, which is e02b=0. It seems to have fixed the problem. Thanks for the guide.
 

RehabMan

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I didn't do any debugging, but I set a Custom PS2 Map entry, which is e02b=0. It seems to have fixed the problem. Thanks for the guide.

By default e02b is already mapped to nothing (0x80) (PS2->ADB), which would generate a "bonk" audio sound when pressed.

If your brightness keys generate both a PS2 e02b and ACPI EC queries, it is a good idea to make the PS2 code do nothing, because you don't want to hear the 'bonk'. Note that PS2 code 0 is also mapped to ADB 0x80, but there might be a special case in the code... further debugging might explain the difference.
 
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Hey Rehab,

I own a Dell 3440, 4210U, nVidia 740m. I installed El Capitan(10.11) with a lot of effort and the help of these forum I almost got everything working on my Rig. Special thanks to your Dell patch for keyboards which which I was able to handle glitch of infinite loop when using the backlight control.

Although I have a similar problem to this and I think you might be able to help with this. It's about the instant wake issue, After a little wile digging I came to know that the PowerButton on my laptop is inside an infinite loop.

I strongly suspect that this is the issue with the instant wake and I want to correct it. Any leads/hints you might give me.
 

RehabMan

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Hey Rehab,

I own a Dell 3440, 4210U, nVidia 740m. I installed El Capitan(10.11) with a lot of effort and the help of these forum I almost got everything working on my Rig. Special thanks to your Dell patch for keyboards which which I was able to handle glitch of infinite loop when using the backlight control.

Although I have a similar problem to this and I think you might be able to help with this. It's about the instant wake issue, After a little wile digging I came to know that the PowerButton on my laptop is inside an infinite loop.

I strongly suspect that this is the issue with the instant wake and I want to correct it. Any leads/hints you might give me.

Off-topic.

ACPI patching for instant wake is covered in the ACPI patching guide: http://www.tonymacx86.com/threads/guide-patching-laptop-dsdt-ssdts.152573/
 

RehabMan

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Joined
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Laptop make & model # > See Rules!
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hi @RehabMan , i use Dell latitude E6520, brightness key is only _Q11 but so how to patch to enable in dsdt ?
 
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