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: [email protected]
Reporter: [email protected]
QA Contact: [email protected]
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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