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-   -   Snow Leopard CMOS reset fix (http://infinitemac.com/showthread.php?t=3478)

candykane 07-13-2009 07:43 AM
Snow Leopard CMOS reset fix
 
Snow leopard beta's have the nasty property that when you reboot it resets your cmos. You can fix this by editing your dsdt file.

Length should be changed to 0x02, its normally 0x04.

Code:
Device (RTC)
{
  Name (_HID, EisaId ("PNP0B00"))
  Name (_CRS, ResourceTemplate ()
  {
    IO (Decode16,
    0x0070,            // Range Minimum
    0x0070,            // Range Maximum
    0x00,              // Alignment
    0x02,              // Length
    )
  })
}

kizwan 07-13-2009 08:20 AM
@candykane
Thank you for sharing that information. At least some activity here. :)

uman 07-30-2009 06:37 PM
candykane,

With Leopard 10.5.6, I have:
Code:
                Device (RTC)
                {
                    Name (_HID, EisaId ("PNP0B00"))
                    Name (_CRS, ResourceTemplate ()
                    {
                        IO (Decode16,
                            0x0070,            // Range Minimum
                            0x0070,            // Range Maximum
                            0x01,              // Alignment
                            0x08,              // Length
                            )
                        IRQNoFlags ()
                            {8}
                    })
                }
Do you know if:

a. the change you suggest is harmless on Leopard
b. whether the IRQNoFlags needs to be there or not in Leopard/Snow Leopard?

Thanks.

digital_dreamer 08-01-2009 01:32 AM
uman,
Absolutely harmless on either OS.
That 8 needs to be changed to 2, but has no affect in Leo.


The IRQNoFlags and following line {8} needs to be deleted, too.
Were you experiencing KPs in SL? I don't know about Leo, but this is known for KPs in SL on ASUS boards.

regards,
MAJ

uman 08-02-2009 02:58 AM
Thanks, I'll make the change.

I'm still using Leo.

infinitek 08-20-2009 12:03 AM
pardon my ignorance but what are you guys using to view and edit your DSDTs.....?

ariadri 08-20-2009 04:07 AM
[quote=infinitek;31544]pardon my ignorance but what are you guys using to view and edit your DSDTs.....?[/QUOTE


download this app http://www.applelife.ru/poleznye_kek...tml#entry93244

after you drag your dsdt.aml you will get a dsdt.dsl which you can edit. once your done just drag your dsdt.dsl back to the app and it will transform it back to dsdt.aml just like magic ^_^

infinitek 08-20-2009 08:05 PM
Thanx...........

mwgdrwg 08-21-2009 11:06 AM
Thanks for this - it fixed that for me. Still have kernel panic and have yet to successfully load the OS though....

dgandra 09-05-2009 02:15 AM
On Device (RTC) section I have the value 0x04 for alignment. I saw on the first post that candykane has 0x00 but on the following posts nobody comment anything about that. Do I have to set the alignment value to 0x00 or leave it with its current value?

thanks in advance!