#12888 NORM su-15.1: brightness controls

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#12888: brightness controls
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            Reporter:  Quozl         |          Owner:
                Type:  defect        |         Status:  new
            Priority:  normal        |      Milestone:  su-15.1
           Component:  not assigned  |        Version:  not specified
          Resolution:                |       Keywords:
          Blocked By:                |       Blocking:  12886
Deployments affected:                |  Action Needed:  diagnose
            Verified:  0             |
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Comment (by Quozl):

 Underlying controls:
  * /sys/devices/platform/dcon/backlight/dcon-bl/brightness default 10,
 range 0-15,
  *
 /sys/devices/pci0000:00/0000:00:03.0/0000:01:00.0/drm/card0/card0-eDP-1/radeon_bl0/brightness,
  * /sys/devices/virtual/backlight/apple_backlight/brightness,
  *
 /sys/devices/pci0000:00/0000:00:02.0/drm/card0/card0-eDP-1/intel_backlight/brightness
 default 7812, range 0-7812,

 Triggering Keysyms:
  * XF86MonBrightnessUp
  * XF86MonBrightnessDown

 Process that writes to underlying controls is Xorg, via file descriptor.
 Therefore this may be part of the X protocol.

 Sugar lacks feature.  References:
  * http://wiki.sugarlabs.org/go/Features/Display_Device (feature
 description),
  * http://dev.laptop.org/~erikos/0001-Frame-device-for-the-disaply.patch
 (proposed patch for screenshot icon only)
  * http://bugs.sugarlabs.org/ticket/4016 (change brightness)
  * http://bugs.sugarlabs.org/ticket/4681 (feedback)

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Ticket URL: <http://dev.laptop.org/ticket/12888#comment:2>
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