On Tue, Mar 26, 2013 at 12:48:44PM +0100, Danny Baumann wrote: > This patch makes the behaviour of the intel_backlight backlight device > consistent to e.g. acpi_videoX: When writing the value 0, the set brightness > makes the panel content barely readable instead of turning the backlight off. > This matches the expectations of user space (e.g. kde-workspace or the Intel > X11 driver), which expects that it can use intel_backlight as a drop-in > replacement for acpi_videoX. I'm not quite clear what you mean here. The behaviour of "0" isn't well defined for the ACPI backlight driver - it's perfectly reasonable for it to turn the backlight off entirely. Anything assuming that "0" is still visible is broken. -- Matthew Garrett | mjg59 at srcf.ucam.org