laptop screen not properly recognised, no brightness control.

[dikkiedirk]

After trying several patches, possibly all wrong I have come to the conclusion that it is not possible to get brightness control working on this laptop or I am on the wrong track. Another possibility is that I have no expertise to solve this problem.

 

So far the patches I tried were all done in the DSDT, but shouldn't they be done to SSDT-2? Because there I find PEGP.DGFX, BCM, BQL and BCL and LCD. IF so, can anyone of you analyse this SSDT-2 an possibly patch it?

ACPI.zip

[H4cktosh]

Can you post your DSDT and extracted IOReg?

 

This may be due to missing or incorrect PNLF device attached to the discrete GPU in the DSDT. It can easily be added if required. It'll look something like this:

            Device (PNLF)
            {
                Name (_ADR, Zero)  // _ADR: Address
                Name (_HID, EisaId ("APP0002"))  // _HID: Hardware ID
                Name (_CID, "backlight")  // _CID: Compatible ID
                Name (_UID, 0x0F)  // _UID: Unique ID
                Name (_STA, 0x0B)  // _STA: Status
                ...

 

You'll find details of a similar (but probably not entirely identical) situation here.

 

hi greeting i have this problem i have attached my patched dsdt and ioreg file please help me if u can

DSDT - Ioreg.zip

[Bronxteck]

if using clover try adding PNLF acpi patch and SetIntelBacklight under devices you can use cloverconfigurator.app

[H4cktosh]

i did this but nothing changed