On Tue, Jan 08, 2008 at 03:45:02PM +0000, Richard Purdie wrote: > I did't get enough context above but I went through the archives and it > seems this is about linearising backlight values. Indeed. The ACPI spec provides a range of 0-100, without specifying what this actually means (it gives brightness and power consumption as two different examples). Implementations are only required to support a subset of these, with the others being ignored. The current hook into the backlight class exports this range but provides no means for an application to determine which values are valid - I'd prefer to just flatten the range to remove the holes. Given the lack of standardisation in the real meaning of the values, I don't think exporting the 0-100 range buys us anything. -- Matthew Garrett | mjg59@xxxxxxxxxxxxx - 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
