On Wed, 26 Dec 2007, Matthew Garrett wrote: > On Wed, Dec 26, 2007 at 02:10:27PM -0800, Andrew Morton wrote: > > > Vice versa for me. The thinkpad_acpi driver in 2.6.23 _does_ work, > > but its interface vanished in 2.6.24-rc5 and the acpi driver does not > > work. > > As I said, the interface for the ACPI backlight driver is confusing. 10 > will only work if the firmware supports it - have you tried other > values? Not on a thinkpad. The AML code is not that stupid, it rounds down to the nearest supported value. It takes a brightness percentage (0 to 100), maps it through a table to get the visual brightness -> hardware brightness curve right (it is non-linear), then does what thinkpad-acpi does to set backlight brightness. -- "One disk to rule them all, One disk to find them. One disk to bring them all and in the darkness grind them. In the Land of Redmond where the shadows lie." -- The Silicon Valley Tarot Henrique Holschuh - 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
