https://bugzilla.kernel.org/show_bug.cgi?id=35622
--- Comment #23 from Lee, Chun-Yi <j...@novell.com> 2011-06-23 02:13:01 --- (In reply to comment #21) > (In reply to comment #20) > > Thank's for your testing, it's help to confirm our value write to EC > > register. > > > > Unfortunately, > > I have no idea why the EC didn't change brightness level even the BRTS > > register > > was changed. I will try to trace DSDT hope can dig more information. This > > issue > > MIGHT not related to acer-wmi driver. > > > > I wonder how does the brightness control key works on Windows 7, I thought > > we > > need EC expert's help. > > I would like to confirm, on Windows 7 it works without problem. > > Thank you! Read this: http://msdn.microsoft.com/en-us/windows/hardware/gg487382.aspx I thought brightness control key works on Windows 7 because it have WDDM video driver, but Linux didn't support WDDM. Per the above spec, windows driver will try 2 ways to modify brightness: + WDDM video driver + if no WDDM video driver, then will follow ACPI standard. So, the _BCM must be work on machine but it's fail on Acer Aspire 5750G. -- 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. Data protection magic? Nope - It's vRanger. Get your free trial download today. http://p.sf.net/sfu/quest-sfdev2dev _______________________________________________ acpi-bugzilla mailing list acpi-bugzilla@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla
