On Mon, 14.10.13 15:48, Matthew Garrett (matthew.garrett@xxxxxxxxxx) wrote: > On Mon, 2013-10-14 at 17:36 +0200, Lennart Poettering wrote: > > > Sorry, still not getting this. How should this ever work if the intel > > video driver is compiled as kmod? That means that it isn't clear at all > > when the kmod is going to be loaded or if it is loaded at all, you > > cannot delay the registration of the acpi backlight that long, since the > > time you'd have to wait is basically unbounded... > > See the intel_opregion_present() code in drivers/acpi/video.c. The ACPI > driver won't bind to Intel hardware until i915 indicates that it should > do so. Hmm, OK, so this means that the acpi backlight will check whether i915 hw is around, and not whether the i915 driver is actually loaded? That would work for me I guess. Thanks. That means on win8 machines with win8 graphics there'll always be a single backlight device in userspace only? Lennart -- Lennart Poettering - Red Hat, Inc. -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
