[ 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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