I have injected ACPIBacklight.kext along with the following DSDT/SSDT patches:
DSDT
audio_HDEF-layout12
graphics_EDID
graphics_HD4K_high
graphics_PNLF_ivy_sandy
graphics_REG-disable
graphics_Rename-GFX0
remove_DSM
system_IMEI
system_IRQ
system_OSYS_win8
system_RTC
system_SMBUS
system_WAK2
usb_prw_0x6d_xhc
SSDT
graphics_SSDT-disable-cleanup
SSDT-1
fix_PSS
SSDT-2
I have tried reverting back to AppleBacklight.kext. Nothing I have tried so far has resulted in a brightness slider in display preferences.
Download patchmatic:
https://bitbucket.org/RehabMan/os-x-maciasl-patchmatic/downloads/RehabMan-patchmatic-2015-0107.zip
Extract the 'patchmatic' binary from the ZIP. Copy it to /usr/bin, such that you have the binary at /usr/bin/patchmatic.
In terminal,
Code:
if [ -d ~/Downloads/RehabMan ]; then rm -R ~/Downloads/RehabMan; fi
mkdir ~/Downloads/RehabMan
cd ~/Downloads/RehabMan
patchmatic -extract
Note: It is easier if you use copy/paste instead of typing the commands manually.
Post contents of Downloads/RehabMan directory (as ZIP).
Also, post ioreg:
http://www.tonymacx86.com/audio/58368-guide-how-make-copy-ioreg.html. Please, use the IORegistryExplorer v2.1 attached to the post! DO NOT reply with an ioreg from any other version of IORegistryExplorer.app.
And output from:
Code:
kextstat|grep -y acpiplat
kextstat|grep -y appleintelcpu
kextstat|grep -y applelpc
If using Clover, post EFI/Clover folder.
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System: manufacturer/model + bootloader(Clover/Chameleon/Chimera)
CPU: detailed CPU model + motherboard chipset
Graphics: all graphics devices + laptop internal screen resolution
For example, typical Ivy laptop:
System: HP ProBook 4540s (Clover)
CPU: i5-3320m/HM76
Graphics: HD4000, 1366x768
Use CPU-Z on Windows to find CPU (Core iX-xxx) and motherboard chipset (HMxx), and graphics capabilities. For a laptop, these details are important and affect critical installation procedures.