https://bugzilla.kernel.org/show_bug.cgi?id=36322
--- Comment #20 from Joern Heissler <kernelb...@joern.heissler.de> 2011-06-04 11:07:21 --- Created an attachment (id=60752) --> (https://bugzilla.kernel.org/attachment.cgi?id=60752) DSDT of an Acer Extensa 5635 I got short access to an Extensa 5635 with Win7 installed. I started grml64-small and copied the DSDT off it (see attachment) before its owner got too suspious :) There is neither a ISBC method nor a BRXP method, like there are on my model. So it's unlikely that win7 makes use of the functions on my laptop. _BCM method is this: Method (_BCM, 1, NotSerialized) { If (LEqual (BOWN, Zero)) { Store (Subtract (Divide (Arg0, 0x0A, ), One), Local0) Store (Local0, BRTN) Acquire (^^^^LPCB.EC0.MUT1, 0xFFFF) Store (Local0, ^^^^LPCB.EC0.BLVL) Release (^^^^LPCB.EC0.MUT1) If (LEqual (OSYS, 0x03E8)) { Store (Multiply (Add (Local0, One), 0x18), Local1) If (LGreater (Local1, 0xFF)) { Store (0xFF, Local1) } Store (Local1, ^^^^GFX0.LBES) } If (LLess (OSYS, 0x07D6)) { If (LEqual (^^^^^WMID.BAEF, One)) { Sleep (0xC8) Store (0x05, ^^^^^WMID.WMIQ) Notify (WMID, 0x80) } } } Else { Store (Zero, BOWN) } } So for linux, it does more than for windows. Win7 only stores the new value in BLVL. Same as on my laptop. _B8E / _B8F are no-ops for Osi==Linux and do Notify DD02 for win7. AINT exists on this laptop as well (but is not called by any other method). It is exactly the same method but the last line which is probably not significant. Therefore I think that it *can* be used to set the brightness too. I couldn't test the brightness control in X, because grml64-small doesn't have it. But I doubt that it would have worked, seeing that DSDT code. So I still guess that win7 calls AINT to set the brightness, instead of _BCM. I will ask the owner if he lets me install a debugger on his laptop, so I can "debug" his windows. -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are watching the assignee of the bug. ------------------------------------------------------------------------------ Simplify data backup and recovery for your virtual environment with vRanger. Installation's a snap, and flexible recovery options mean your data is safe, secure and there when you need it. Discover what all the cheering's about. Get your free trial download today. http://p.sf.net/sfu/quest-dev2dev2 _______________________________________________ acpi-bugzilla mailing list acpi-bugzilla@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla
