[PATCH v2] acpi-video: Add a parameter to not register the backlight sysfs interface

Aaron Lu aaron.lu at intel.com
Wed Jun 10 18:43:15 PDT 2015

On Tue, Jun 09, 2015 at 11:54:45PM +0200, Hans de Goede wrote:
> Hi,
> On 06/09/2015 11:10 AM, Aaron Lu wrote:
> >On Tue, Jun 09, 2015 at 10:32:25AM +0200, Hans de Goede wrote:
> >>On some systems acpi-video backlight is broken in the sense that it cannot
> >>control the brightness of the backlight, but it must still be called on
> >>resume to power-up the backlight after resume.
> >
> >All the video module does on resume is a backlight set operation, it
> >can't control backlight but can turn on the screen on resume? Hmm...
> >
> >I'll ask Sylvain to attach acpidump, let's see if there is anything
> >special there.
> Ok, lets see what comes out of that. Note in the mean time Sylvain has
> attached his acpidump.

According to the discussion in the bugzilla place, it doesn't seem we
have any other way to handle this at the moment.

Acked-by: Aaron Lu <aaron.lu at intel.com>

Best wishes,

More information about the dri-devel mailing list