ACPI: disable _OSI(Windows 2009) on Asus K50IJ
commit81074e90f5c150ca70ab8dfcc77860cbe76f364d
authorZhang Rui <rui.zhang@intel.com>
Mon, 21 Dec 2009 08:13:15 +0000 (21 16:13 +0800)
committerLen Brown <len.brown@intel.com>
Tue, 22 Dec 2009 07:39:24 +0000 (22 02:39 -0500)
tree607fd815382a44b6876ebaa9840f644764175f39
parent22763c5cf3690a681551162c15d34d935308c8d7
ACPI: disable _OSI(Windows 2009) on Asus K50IJ

Fix a win7 compability issue on Asus K50IJ.

Here is the _BCM method of this laptop:
                    Method (_BCM, 1, NotSerialized)
                    {
                        If (LGreaterEqual (OSFG, OSVT))
                        {
                            If (LNotEqual (OSFG, OSW7))
                            {
                                Store (One, BCMD)
                                Store (GCBL (Arg0), Local0)
                                Subtract (0x0F, Local0, LBTN)
                                ^^^SBRG.EC0.STBR ()
                                ...
                            }
                            Else
                            {
                                DBGR (0x0B, Zero, Zero, Arg0)
                                Store (Arg0, LBTN)
                                ^^^SBRG.EC0.STBR ()
                                ...
                            }
                        }
                    }
LBTN is used to store the index of the brightness level in the _BCL.
GCBL is a method that convert the percentage value to the index value.
If _OSI(Windows 2009) is not disabled, LBTN is stored a percentage
value which is surely beyond the end of _BCL package.

http://bugzilla.kernel.org/show_bug.cgi?id=14753

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
drivers/acpi/blacklist.c