DSDT patch for Windows 7

[Perch]

I've discovered, that wrong OS detection in DSDT affects not only OS X. When I upgraded to Windows 7 from Vista I got CPU locked on 50% of frequency and not working sleep ie same symptoms as under OS X. So I really need to patch DSDT for both OS X and Windows 7. Is it posible?

[Blackosx]

Hi Perch

Windows 7 should run just fine using your motherboards' BIOS supplied by the manufacturer. If not then you should contact said manufacturer. Chameleon will not do anything other than allow Windows 7 to boot normally.

[Perch]

There is no Windows 7 support for my notebook. But I understand, that adding this feature to Chameleon is complicated. Thanks for reply.

[Gringo Vermelho]

AFAIK Windows Vista and 7 use the same "Windows 2006" OSPM code in the DSDT table, so there should be no change. Unless..

Did you SLIC 2.1 mod your BIOS before installing Windows 7?

 

[Perch]

I dumped DSDT from ASUS K50:

Code: [Select]

        Name (OSFG, Zero)
        Name (OS9X, One)
        Name (OS98, 0x02)
        Name (OSME, 0x04)
        Name (OS2K, 0x08)
        Name (OSXP, 0x10)
        Name (OSVT, 0x20)
        Name (OSEG, 0x40)
        Name (OSW7, 0x80)
        Name (SLMT, Zero)
        Method (MSOS, 0, NotSerialized)
        {
            If (CondRefOf (_OSI, Local0))
            {
                If (_OSI ("Windows 2001"))
                {
                    Store (OSXP, OSFG)
                }

                If (_OSI ("Windows 2001 SP1"))
                {
                    Store (OSXP, OSFG)
                }

                If (_OSI ("Windows 2001 SP2"))
                {
                    Store (OSXP, OSFG)
                }

                If (_OSI ("Windows 2006"))
                {
                    Store (OSVT, OSFG)
                }

                If (_OSI ("Linux"))
                {
                    Store (OSEG, OSFG)
                }

                If (_OSI ("Windows 2009"))
                {
                    Store (OSW7, OSFG)
                }

                If (_OSI ("Linux"))
                {
                    Store (OSEG, OSFG)
                }

                If (_OSI ("Windows 2009"))
                {
                    Store (OSW7, OSFG)
                }

                Return (OSFG)
            }
            Else
            {
                If (MCTH (_OS, "Microsoft Windows"))
                {
                    Store (OS98, OSFG)
                }
                Else
                {
                    If (MCTH (_OS, "Microsoft WindowsME: Millennium Edition"))
                    {
                        Store (OSME, OSFG)
                    }
                    Else
                    {
                        If (MCTH (_OS, "Microsoft Windows NT"))
                        {
                            Store (OS2K, OSFG)
                        }
                        Else
                        {
                            Store (OSXP, OSFG)
                        }
                    }
                }
            }

            Return (OSFG)
        }
As you can see interface name is different. And yes, I did SLIC 2.1 mod.
Up: DSDT from K50 in attachment.

[Gringo Vermelho]

It's strange that there's no Windows 7 support for your laptop when it obviously has specific DSDT code for it.

I'm sure there must be a way to patch DSDT for Windows..?

[Perch]

It's not my notebook. My device is ASUS G1Sn. I took DSDT from K50 as an example of W7 specific code. My DSDT in attach.
I tried to patch BIOS firmware but it is very inconvenient way, because  patched file after compilation should not be longer than the original and there is always an element of risk in BIOS re-flashing.