> On Thu, 24 Jan 2008 16:44:48 -0500 Len Brown <lenb@xxxxxxxxxx> wrote: > On Tuesday 25 December 2007 21:03, Matthew Garrett wrote: > > The sysfs backlight class provides no mechanism for querying the > > acceptable brightness for a backlight. The ACPI spec states that values > > are only valid if they are reported as available by the firmware. Since > > we can't provide that information to userspace, instead collapse the > > range to the number of actual values that can be set. > > > > Signed-off-by: Matthew Garrett <mjg59@xxxxxxxxxxxxx> > > I wish we did this in the first place. > But doing it now is an API change -- since > with the old way 100 always meant 100% brightness, yes? > > so my concern is that if we change what "10" means, somebody like akpm > with an existing script gets grumpy. It takes more than that to make me grumpy. I've been very grumpy lately. - Create a new /sys node with a new name which has the new semantics. - Deprecate the old /sys entry by emitting an angry printk when someone uses it. - Wait 12 months - Kill the old one. - 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
