Hi Matthew, Sorry, I don't understand what you mean. Let me explain it again. The BIOS engineer refuse to remove the ACPI functions(_BCM) in BIOS code, so we'll have acpi_video0 interface be created under /sys/class/backlight/ and that interface doesn't work. This patch is equal to add this kernel command line "acpi_backlight=vendor" So that, there will be no acpi_video0 be create, and we will use intel_backlight interface instead. Best regards, AceLan Kao. 2013/12/3 Matthew Garrett <mjg59@xxxxxxxxxxxxx>: > On Tue, Dec 03, 2013 at 02:50:07PM +0800, AceLan Kao wrote: >> The acpi_video0 interface doesn't not work on Dell Inspiron 3138, >> so using the vendor brightness interface, instead of the acpi one. > > No, this needs to be fixed properly by disabling the ACPI interface on > Windows 8 systems. > > -- > Matthew Garrett | mjg59@xxxxxxxxxxxxx > -- > To unsubscribe from this list: send the line "unsubscribe platform-driver-x86" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- Chia-Lin Kao(AceLan) http://blog.acelan.idv.tw/ E-Mail: acelan.kaoATcanonical.com (s/AT/@/) -- To unsubscribe from this list: send the line "unsubscribe platform-driver-x86" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
