From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andrey Borzenkov <arvidjaar@mail.ru>
Subject: 2.6.28 - new warning evaluating _BIF - found Buffer, expected String
Date: Wed, 29 Oct 2008 20:38:52 +0300
Message-ID: <200810292038.53075.arvidjaar@mail.ru>
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[   36.156325] ACPI: AC Adapter [ADP1] (off-line)
[   36.177259] ACPI Warning (nspredef-0858): \_SB_.BAT1._BIF: Return Package type mismatch at index 9 - found Buffer, expected String [20080926]
[   36.183721] ACPI: Battery Slot [BAT1] (battery present)
[   36.184307] ACPI: Battery Slot [BAT2] (battery absent)

well, battery.c extrac_package deals with both string and buffer just fine.
I am not sure if this warning is really needed in normal kernel - after all,
Buffer to String conversion has well defined sematic in ACPI.

There is nothing user can do about it anyway.

For reference, here is _BIF method; it is Toshiba Portege 4000:

            Method (_BIF, 0, NotSerialized)
            {
                Name (BUFF, Package (0x0D) {})
                Store (0x00, Index (BUFF, 0x00))
                Store (\_SB.MEM.BDV1, Local2)
                Multiply (\_SB.MEM.BDC1, Local2, Local0)
                Divide (Local0, 0x03E8, Local1, Local0)
                Store (Local0, Index (BUFF, 0x01))
                Multiply (\_SB.MEM.BLF1, Local2, Local0)
                Divide (Local0, 0x03E8, Local1, Local0)
                Store (Local0, Index (BUFF, 0x02))
                Store (\_SB.MEM.BTC1, Index (BUFF, 0x03))
                Store (\_SB.MEM.BDV1, Index (BUFF, 0x04))
                Multiply (\_SB.MEM.BCW1, Local2, Local0)
                Divide (Local0, 0x03E8, Local1, Local0)
                Store (Local0, Index (BUFF, 0x05))
                Multiply (\_SB.MEM.BCL1, Local2, Local0)
                Divide (Local0, 0x03E8, Local1, Local0)
                Store (Local0, Index (BUFF, 0x06))
                Multiply (\_SB.MEM.BG11, Local2, Local0)
                Divide (Local0, 0x03E8, Local1, Local0)
                Store (Local0, Index (BUFF, 0x07))
                Multiply (\_SB.MEM.BG21, Local2, Local0)
                Divide (Local0, 0x03E8, Local1, Local0)
                Store (Local0, Index (BUFF, 0x08))
                Store (\_SB.MEM.BMN1, Index (BUFF, 0x09))
                Store (\_SB.MEM.BSN1, Index (BUFF, 0x0A))
                Store (\_SB.MEM.BTP1, Index (BUFF, 0x0B))
                Store (\_SB.MEM.BOI1, Index (BUFF, 0x0C))
                Return (BUFF)
            }

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