On Fri, 12 Nov 2010, Matthew Garrett wrote: > On Thu, Nov 11, 2010 at 10:00:03PM -0500, Alan Stern wrote: > > > But my computer doesn't have an LCD display. It's a desktop, not a > > laptop. So why do I need BACKLIGHT_CLASS_DEVICE to be enabled? > > Well, in the near future ddc-ci will be hooked up and you'll have > backlight control over VGA if your monitor supports it, so even if we > fix this up now you'll just end up getting it back in the near future > because we can't tell that at build-time... > > > Are you saying I don't need ACPI_VIDEO if the machine doesn't have an > > integrated LCD display? That doesn't agree with the Kconfig help > > message. > > But to that, yes. The only reason to use ACPI_VIDEO is to get EDID from > firmware (which isn't relevant on desktops) or to control backlights. > Every other theoretical feature it has is useless in the real world. Thanks for the information. Why does the help text for ACPI_VIDEO mention defining the POST device or setting up a video output if the driver doesn't do these things? Alan Stern -- 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
