Dell 5491: failed to add patch via Maciasl.app for adjust screen brightness

[kai wang]

Hello ,

below is detail hardware configure for laptop dell 5491.

• Bios: 1.11.1
• CPU: i5-8300H @2.3G
• Memory: 8G DDR4 2666MHZ
• Mainboard: DELL 0NFNN4 (CM246 Chipsets)
• SSD: Toshiba 256G NVME (primary)
• HDD: SATA ST1000LM049 (second)
• Sound: Realtek ALC256
• Lan: Intel I219LM7
• Wireless/Bluetooth: Qualcomm QCA61X4A 802.11AC
• TrackPad Hardware ID : ACPI\VEN_DELL&DEV_0818 (I2C HID )

I has been completely install Catalina 10.15.4 on my laptop .

I want add adjust screen brightness function into my laptop via add patch into dsdt.aml .

Frist i got dsdt.aml file on clover start menu via press FN+F4 , then i got dsdt.dsl file via type command " tonykai@MacBook-Pro acpi % iasl -da -dl *.aml " on terminal .

final , i add blow patch into dsdt.aml file via Maciasl.app , but system showed a error information to me " input file does not appear to be an ASL or data table source file " when execute compile . 

below is patch content .

#Maintained by: RehabMan for: Laptop Patches
#graphics_PNLF.txt

# This patch enables the brightness slider in SysPrefs->Displays
# and will also enable activation of sleep mode by closing
# the laptop lid.

# This patch is a “basic” PNLF patch and doesn’t attempt
# to fix various common problems with the backlight control.
#
# For advanced patches, see:
# graphics_PNLF_ivy_sandy.txt
# graphics_PNLF_haswell.txt
#

into_all device label PNLF remove_entry;
into definitionblock code_regex . insert
begin
Scope (_SB)\n
{\n
Device (PNLF)\n
{\n
Name (_ADR, Zero)\n
Name (_HID, EisaId (“APP0002”))\n
Name (_CID, “backlight”)\n
Name (_UID, 10)\n
Name (_STA, 0x0B)\n
}\n
}\n
end;

# to avoid conflict with root scope PNLF
into_all method code_regex Store\s+\(PNLF,\s+(.*)\) replaceall_matched begin Store(\\PNLF, %1) end;

 

By the way ,

attachment is error information photo and my dsdt.aml file and current config.plist file.

Please help me and give some suggestions .

Thank you .

 

acpi.zip error_edit_dsdt2.jpg.zip config.plist.zip

[MaLd0n]

ur processor is coffelake or kabylake?

[kai wang]

my processor is Coffee Lake .

[MaLd0n]

for cfl use 0x13

 Name (_UID, 0x13)

 

[kai wang]

Hello ,

What is this  words ( for cfl use 0x13 ) means ?  i haven't find any relevant parameter for cfl on clover .

Sorry ,I am beginner for use maciasl app to add patch .

 

[MaLd0n]

into_all device label PNLF remove_entry;
into scope label _SB insert
begin
Device (PNLF)\n
        {\n
            Name (_HID, EisaId ("APP0002"))  // _HID: Hardware ID\n
            Name (_CID, "backlight")  // _CID: Compatible ID\n
            Name (_UID, 0x13)  // _UID: Unique ID\n
            Name (_STA, 0x0B)  // _STA: Status\n
        }\n
end

 

[kai wang]

Hello ,

I  successful add patch for adjust screen brightness now .

I can adjust screen brightness now .

Thank you very much .

Attachment is add patch photo and final result photo.

 

 

 

add patch .jpg.zip success result photo.jpg.zip