On Fri, Jun 29, 2012 at 02:24:38PM +0200, Corentin Chary wrote: > On Thu, Jun 28, 2012 at 9:36 PM, Matthew Garrett <mjg59@xxxxxxxxxxxxx> wrote: > > On Thu, Jun 28, 2012 at 02:30:17PM -0500, Seth Forshee wrote: > > > >> I actually don't think Corentin's solution is a bad one. It does suffer > >> from a couple of shortcomings though. First, it only works for broken > >> ACPI backlights, and some platforms have other backlight interfaces that > >> are broken (e.g. the i915 backlight on the MacBook Pro 8,2). Second, > >> marking backlights as broken in the kernel necessitates ever-expanding > >> dmi blacklists in some of the platform drivers, unless we can get > >> vendors to stop providing broken backlight interfaces. > > > > Userspace should already be prioritising platform interfaces over raw > > interfaces, so if gmux works on the Mac then there's no problem. > > Hehe, sometime the platform interface doesn't work and the raw does. > That's the case on various samsung-laptop since we have absolutely no > documentation about SABI and no known way to probe if the > implementation is working or not. But anyway, for samsung-laptop it's > disabled by default in favor of acpi_video (which is also broken most > of the time on samsung laptops). The situation is similar with Toshibas. On some the raw interface is still the only reliable way to change the backlight. I just got my hands on one of these models though, so I'm hoping to make some progress on that front in the near future. -- To unsubscribe from this list: send the line "unsubscribe platform-driver-x86" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html