On Wed, Dec 04, 2013 at 04:14:15PM +0800, AceLan Kao wrote: > It does what you say above. > But, the variable use_native_backlight is false by default, and user > has to enable this by adding one kernel parameter > video.use_native_backlight=1 > I don't see this do any difference with acpi_backlight=vendor as user > has to add the kernel command line explicitly to get rid of the broken > acpi_video0. Right. The default needs to be changed. > We always encourage OEM BIOS to follow the ACPI spec., if not, we'll > ask them to remove _BCL, _BCM, _BQC functions. > And Dell Inspiron 3138 is the first one that they refuse our request, > so I would like to fix it in the kernel. The best thing to do is to send a patch that flips the default on Windows 8 systems and get it pushed through the drm-next tree in order to work out the remaining bugs in the intel backlight driver. > So, I think we probably need some quirks to disable acpi_video0 by the > mean while before use_native_backlight is default true. Sorry, I'm not adding any machine-specific quirks to fix generic problems. -- 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
