[solved] Dell Latitude 3480 - Backlight / Audio Issues

[MattForMac]

I have 2 problems I'm needing help with but will start with backlight with keys while I keep powering on with audio

The Keys fr Brightness Up (Fn+F11)/Down(Fn+F12) not working. (Brightness works from Sys->Display)
I followed this https://www.tonymacx86.com/threads/guide-patching-dsdt-ssdt-for-laptop-backlight-control.152659/ but I can't get system.log won't report it as PS2 and dent report any EC either. Mist be missing something but I can't work out what.

Dell Latitude 3480 (Clover)
i5-7200U Kaby Lake
Intel HD 620

 

[RehabMan]

I have 2 problems I'm needing help with but will start with backlight with keys while I keep powering on with audio

The Keys fr Brightness Up (Fn+F11)/Down(Fn+F12) not working. (Brightness works from Sys->Display)
I followed this https://www.tonymacx86.com/threads/guide-patching-dsdt-ssdt-for-laptop-backlight-control.152659/ but I can't get system.log won't report it as PS2 and dent report any EC either. Mist be missing something but I can't work out what.

Dell Latitude 3480 (Clover)
i5-7200U Kaby Lake
Intel HD 620

system.log is not used on Sierra and later.
Read here:
https://www.tonymacx86.com/threads/readme-common-problems-in-10-13-high-sierra.233582/

 

[MattForMac]

Thanks for that, its calling

 Method (_Q66, 0, NotSerialized)  // _Qxx: EC Query
            {
                \rmdt.p1("EC _Q66 enter")
Acquire (PATM, 0x0064)
                If (LNotEqual (ECRD, One))
                {
                    Release (PATM)
                    Return (Zero)
                }

                NEVT ()
                Release (PATM)
                Return (Zero)
\rmdt.p1("EC _Q66 exit")

            }

but I'm lost trying to get it to action the brightness up/down has anyone worked with any similar before already?

 

[RehabMan]

Thanks for that, its calling

 Method (_Q66, 0, NotSerialized)  // _Qxx: EC Query
            {
                \rmdt.p1("EC _Q66 enter")
Acquire (PATM, 0x0064)
                If (LNotEqual (ECRD, One))
                {
                    Release (PATM)
                    Return (Zero)
                }

                NEVT ()
                Release (PATM)
                Return (Zero)
\rmdt.p1("EC _Q66 exit")

            }

but I'm lost trying to get it to action the brightness up/down has anyone worked with any similar before already?

If you continue to investigate, you'll find brightness keys handled in BRT6.
It is covered in the guide.

 

[MattForMac]

Not sure I get what I'm meant to change? ... apologise for my ignorance.

I ran the patch from the guide and still no effect.

into method label BRT6 replace_content
begin
    If (LEqual (Arg0, One))\n
    {\n
// Brightness Up\n
        Notify (^^LPCB.PS2K, 0x0406)\n
    }\n
    If (And (Arg0, 0x02))\n
    {\n
// Brightness Down\n
        Notify (^^LPCB.PS2K, 0x0405)\n
    }\n
end;

I changed the values of LCD to the below still not working.

Method (BRT6, 2, NotSerialized)
        {
            If (LEqual (Arg0, One))
            {
                Notify (LCD, 0x0405)
            }

            If (And (Arg0, 0x02))
            {
                Notify (LCD, 0x0406)
            }
        }

have I missed something?

 

[RehabMan]

Not sure I get what I'm meant to change? ... apologise for my ignorance.

I ran the patch from the guide and still no effect.

into method label BRT6 replace_content
begin
    If (LEqual (Arg0, One))\n
    {\n
// Brightness Up\n
        Notify (^^LPCB.PS2K, 0x0406)\n
    }\n
    If (And (Arg0, 0x02))\n
    {\n
// Brightness Down\n
        Notify (^^LPCB.PS2K, 0x0405)\n
    }\n
end;

I changed the values of LCD to the below still not working.

Method (BRT6, 2, NotSerialized)
        {
            If (LEqual (Arg0, One))
            {
                Notify (LCD, 0x0405)
            }

            If (And (Arg0, 0x02))
            {
                Notify (LCD, 0x0406)
            }
        }

have I missed something?

No "Problem Reporting" files attached.
Read FAQ, "Problem Reporting" again. Carefully. Attach all requested files/output.
https://www.tonymacx86.com/threads/faq-read-first-laptop-frequent-questions.164990/
Use the gen_debug.sh tool mentioned in the FAQ, that way it is less likely you'll omit something.

 

[MattForMac]

This is the last niggle to my setup. not the end of the world but would be nice to get these 2 keys working.

 

[RehabMan]

This is the last niggle to my setup. not the end of the world but would be nice to get these 2 keys working.

Your BRT6 method in ACPI/patched/DSDT.aml is not patched.

 

[MattForMac]

I have patched is as per the guide and checked I copied the attached aml to EF/Clover/Patched but still no effect from pressing the keys.

attached the new DSDT, I rename it and move it every time. Need the whole debug again?

 

[RehabMan]

I have patched is as per the guide and checked I copied the attached aml to EF/Clover/Patched but still no effect from pressing the keys.

attached the new DSDT, I rename it and move it every time. Need the whole debug again?

Any change requires all new/updated problem reporting files.