DSDT

Differentiated System Description Table (DSDT) - DSDT is a part of the ACPI specification and it supplies configuration information about a base system. ACPI capable computers come with a preinstalled DSDT from the manufacturer. A common Linux/OS X problem is missing ACPI functionality (fans not running, laptop screens not shutting off, etc.)

This subforum is dedicated to patches/fixes able to be inserted/modified from an extracted dsdt.dsl, which is then compiled into a DSDT.aml for OS X to pick up and use (with a proper bootloader).

These fixes are not permanent, and do not damage your BIOS.

Ioatafamily Panic Fix, How to fix the panic and get rid of ugly boot warning...

Options

THe KiNG

Nov 2 2009, 01:44 PM

Post #1

• 
• Advanced Member
• Group: Staff
• Posts: 226
• Joined: 26-March 09
• Member No.: 29
• View Member Profile
• [Less]

Hi,

Thanks to Galaxy who provided full dumps from his MacBookPro, ApexDE who founded the fix for J-Micron AHCI(and made me curious how he did it) and to Kabyl that always point me to the right docs, I was able to fix that IOATAFamily panic and that ugly "AppleIntelPIIXPATA: Secondary PCI IDE channel is disabled" warning on boot with a DSDT fix.

Find your Intel PATA controller in DSDT, should be on 0x001F0001, and add this code:

CODE

OperationRegion (IDET, PCI_Config, 0x40, 0x04) // IDE Timing Register
Field (IDET, WordAcc, NoLock, Preserve)
{
Offset (0x00),
M1, 8,
Offset (0x01),
M2, 8,
Offset (0x02),
M3, 8,
Offset (0x03),
M4, 8
}

Method (_DSM, 4, NotSerialized)
{
Store (0x07, M1)
Store (0xE3, M2)
Store (Zero, M3)
Store (0xC0, M4)
Return (Zero)
}

Enjoy using original kext and a clean verbose boot

L.E. This fix is only for Intel PATA controller!

Top

QuoteReply