Reserved method has too many arguments (_OSC requires 4)
by Thomas Renninger
Hi,
I have a laptop freezing early, acpi=off and noapic helps.
I wonder whether this could have to do with the broken _OSC method.
I cannot access the machine myself, eventually I can get more info
if needed, but the machine is freezing really early (after ACPI
initialization, somewhere around bringing up CPUs (possibly when
starting PCI init already?).
This is not the first time I see this message.
It would be great to get (from include/linux/kernel.h):
#define FW_BUG "[Firmware Bug]: "
#define FW_WARN "[Firmware Warn]: "
#define FW_INFO "[Firmware Info]: "
marked messages into ACPICA and blame the guys who are responsible
for that.
My other concern/question is: what exactly happens in such a case?
Will _OSC get invoked at all?
If yes, what will be the last argument, zero, -1?
Hmm, I doubt it has to do with the freeze, but it would still be
great if someone knowing these parts could comment what people
with such a BIOS could expect to happen.
Thanks,
Thomas
Method (_OSC, 5, NotSerialized)
{
Store (Arg3, Local0)
Multiply (Local0, 0x04, Local1)
Name (BUF1, Buffer (Local1) {})
Store (Arg4, BUF1)
Store (Zero, Local1)
Store (Zero, Local2)
While (Local0)
{
Multiply (Local1, 0x04, Local2)
CreateDWordField (BUF1, Local2, CAPB)
If (Arg2)
{
If (LEqual (Local1, Zero))
{
And (CAPB, 0xFFFFFFFC)
}
}
Increment (Local1)
Decrement (Local0)
}
Return (BUF1)
}
11 years, 4 months
acpi interpretter and device detection
by Michal Zegan
Hey.
I don't use acpica, but i'm trying to make an os kernel.
I have some question:
How difficult is it to write an acpi interpretter?
I know that there are problems with suspend/hibernate on many motherboards but i'm not sure about that.
Also, how can i (in general) detect legacy devices? by acpi or by probing hardware io ports?
11 years, 7 months
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11 years, 7 months
Why are empty packages invalid for predefined ACPI objects?
by Grégoire Sutre
Hi,
The package validation function AcpiNsCheckPackage() in file nspredef.c
requires that packages be non-empty:
/* The package must have at least one element, else invalid */
if (!Count)
{
ACPI_WARN_PREDEFINED ((AE_INFO, Data->Pathname, Data->NodeFlags,
"Return Package has no elements (empty)"));
return (AE_AML_OPERAND_VALUE);
}
I don't see, from the ACPI specification, why packages for predefined
ACPI objects must be non-empty.
Where does this requirement come from?
Best regards,
Grégoire Sutre
11 years, 7 months
Xerox WorkCentre Scan P0887317
by Lupe Singer
Hello,
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11 years, 7 months
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11 years, 7 months
