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    ACPI: make _OSI(Linux) console messages smarter · d4b7dc49
    Len Brown 提交于
    If BIOS invokes _OSI(Linux), the kernel response
    depends on what the ACPI DMI list knows about the system,
    and that is reflectd in dmesg:
    
    1) System unknown to DMI:
    
    ACPI: BIOS _OSI(Linux) query ignored
    ACPI: DMI System Vendor: LENOVO
    ACPI: DMI Product Name: 7661W1P
    ACPI: DMI Product Version: ThinkPad T61
    ACPI: DMI Board Name: 7661W1P
    ACPI: DMI BIOS Vendor: LENOVO
    ACPI: DMI BIOS Date: 10/18/2007
    ACPI: Please send DMI info above to linux-acpi@vger.kernel.org
    ACPI: If "acpi_osi=Linux" works better, please notify linux-acpi@vger.kernel.org
    
    2) System known to DMI, but effect of OSI(Linux) unknown:
    
    ACPI: DMI detected: Lenovo ThinkPad T61
    ...
    ACPI: BIOS _OSI(Linux) query ignored via DMI
    ACPI: If "acpi_osi=Linux" works better, please notify linux-acpi@vger.kernel.org
    
    3) System known to DMI, which disables _OSI(Linux):
    
    ACPI: DMI detected: Lenovo ThinkPad T61
    ...
    ACPI: BIOS _OSI(Linux) query ignored via DMI
    
    4) System known to DMI, which enable _OSI(Linux):
    
    ACPI: DMI detected: Lenovo ThinkPad T61
    ACPI: Added _OSI(Linux)
    ...
    ACPI: BIOS _OSI(Linux) query honored via DMI
    
    cmdline overrides take precidence over the built-in
    default and the DMI prescribed default.
    cmdline "acpi_osi=Linux" results in:
    
    ACPI: BIOS _OSI(Linux) query honored via cmdline
    Signed-off-by: NLen Brown <len.brown@intel.com>
    d4b7dc49
osl.c 30.4 KB