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SubjectRe: [REGRESSION/PATCH] acpi: blacklist win8 OSI for ASUS Zenbok Prime UX31A
On Wed, Jul 31, 2013 at 06:32:47AM -0500, Felipe Contreras wrote:
> On Wed, Jul 31, 2013 at 12:14 AM, Matthew Garrett <> wrote:
> > There's no mechanism for an OS to know whether or not a firmware
> > implementation will actually turn the backlight off at 0, so there's no
> > way the OS can define the lowest backlight state as anything other than
> > "May or may not turn the screen off".
> Yes there is; quirks.

We aren't going to maintain a quirk list in order to support a guarantee
that was never made. "0" as a backlight level has potentially meant
"screen off" since the interface was first introduced.

Matthew Garrett |

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