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ACPI: extend "acpi_osi=" boot option

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The boot option "acpi_osi=" has always disabled Linux _OSI support,
thus disabling all OS Interface strings which are advertised
by Linux to the BIOS.

Now...
acpi_osi="string" adds the interface string, and
acpi_osi="!string" invalidates the pre-defined interface string

eg. acpi_osi="!Windows 2006"
would disable Linux's claim of Vista compatibility.

Signed-off-by: Len Brown <[email protected]>
This commit is contained in:
Len Brown 2007-05-29 18:43:33 -04:00
commit ae00d81243
4 changed files with 47 additions and 11 deletions
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5
Documentation/kernel-parameters.txt
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@ -170,7 +170,10 @@ and is between 256 and 4096 characters. It is defined in the file
acpi_os_name= [HW,ACPI] Tell ACPI BIOS the name of the OS
Format: To spoof as Windows 98: ="Microsoft Windows"
acpi_osi= [HW,ACPI] empty param disables _OSI
acpi_osi= [HW,ACPI] Modify list of supported OS interface strings
acpi_osi="string1" # add string1 -- only one string
acpi_osi="!string2" # remove built-in string2
acpi_osi= # disable all strings
acpi_serialize [HW,ACPI] force serialization of AML methods