Debug Patch

首先要给DSDT 打上补丁，查看FN亮度按键触发了什么。具体看国外大佬的参考资料：

我的是EC Query

Method (_Q12, 0, NotSerialized)  // _Qxx: EC Query
                {
                    Store (0x12, P80H)
                    If (And (WINF, One))
                    {
                        If (LEqual (OSYS, 0x03E8))
                        {
                            If (And (PSF0, 0x10))
                            {
                                Notify (^^^PEG0.PEGP.LCD0, 0x86)
                            }
                            Else
                            {
                                Notify (^^^GFX0.DD1F, 0x86)
                            }
                        }
                        ElseIf (And (PSF0, 0x10))
                        {
                            Notify (^^^PEG0.PEGP.LCD0, 0x86)
                        }
                        ElseIf (LEqual (^^^GFX0.CDDS (0x0410), 0x1F))
                        {
                            Notify (^^^GFX0.DD1F, 0x86)
                        }
                    }
                    ElseIf (^^^^WMI.HKDR)
                    {
                        Add (OEM2, 0xE0, ^^^^WMI.EVNT)
                        Notify (WMI, 0xD0)
                    }
                }

Analyse

两个按键都使用了Q12这个Method，所以我们现在给加入debug相关的代码，看那些变量的值是怎样变化的。

Store (PSF0, Local0)
\RMDT.P2 ("#1 PSF0 is: ", Local0)
Store (WINF, Local1)
\RMDT.P2 ("#1 WINF is: ", Local1)
Store (WINF, Local2)
\RMDT.P2 ("#1 OSYS is: ", Local2)
Store (OEM2, Local2)
\RMDT.P2 ("#1 OEM2 is: ", Local2)

Success

我们看到OEM2 发生了变化，所以我们现在就可以做对应修改了。 以下代码正常工作

Method (_Q12, 0, NotSerialized)  // _Qxx: EC Query
                {
                    Store (0x12, P80H)
                    Store (OEM2, Local0)
                    If (LEqual (Local0, One))
                    {
                        Notify (PS2K, 0x0405)
                    }

                    If (LEqual (Local0, 0x03))
                    {
                        Notify (PS2K, 0x0406)
                    }

                    Store (0x02, OEM2)
                }