[Bug 100922] New: Redundant nv_backlight created on Optimus enabled laptop.

[Bug 100922] New: Redundant nv_backlight created on Optimus enabled laptop.

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https://bugs.freedesktop.org/show_bug.cgi?id=100922

            Bug ID: 100922
           Summary: Redundant nv_backlight created on Optimus enabled
                    laptop.
           Product: xorg
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
          Assignee: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
          Reporter: kai.heng.feng-Z7WLFzj8eWMS+FvcfC7Uqw@public.gmane.org
        QA Contact: xorg-team-go0+a7rfsptAfugRpC6u6w@public.gmane.org

Original bug report:
https://bugs.launchpad.net/bugs/1683445

On Dell E6430, Optimus is enabled in BIOS settings, there are two backlights
interface being created: intel_backlight and nv_backlight. Changing brightness
in nv_backlight does nothing, intel_backlight is in charge here.

Userspace backlight control tools (unity-settings-daemon/gnome-settings-daemon)
will use nv_backlight on this laptop, because nouveau is card0 here.

Dived a little deeper, nv_backlight is created because
'connector->connector_type' is DRM_MODE_CONNECTOR_LVDS on this laptop.

Can we disable nouveau's backlight on Optimus laptop?

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[Bug 100922] Redundant nv_backlight created on Optimus enabled laptop.

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

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https://bugs.freedesktop.org/show_bug.cgi?id=100922

Kai-Heng Feng <kai.heng.feng-Z7WLFzj8eWMS+FvcfC7Uqw@public.gmane.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |WONTFIX

--- Comment #1 from Kai-Heng Feng <kai.heng.feng-Z7WLFzj8eWMS+FvcfC7Uqw@public.gmane.org> ---
This can be resolved via userspace program: 
https://bugzilla.gnome.org/show_bug.cgi?id=782211

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