On Wed, Sep 25, 2013 at 07:53:13PM +0200, Rafael J. Wysocki wrote: > On Tuesday, September 24, 2013 05:47:31 PM Aaron Lu wrote: > > According to Matthew Garrett, "Windows 8 leaves backlight control up > > to individual graphics drivers rather than making ACPI calls itself. > > There's plenty of evidence to suggest that the Intel driver for > > Windows [8] doesn't use the ACPI interface, including the fact that > > it's broken on a bunch of machines when the OS claims to support > > Windows 8. The simplest thing to do appears to be to disable the > > ACPI backlight interface on these systems". > > > > So for Win8 systems, if there is native backlight control interface > > registered by GPU driver, ACPI video will not register its own. For > > users who prefer to keep ACPI video's backlight interface, the existing > > kernel cmdline option acpi_backlight=video can be used. > > I think the idea is to use the aggressive default for now and we can switch the > default back to the current behavior before the merge window in case there are > too many problems with it? Yes I think so. Thanks, Aaron _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
