[Bug 81762] Backlight keys on ASUS UX301

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=81762

--- Comment #3 from Josh Boyer <jwboyer at fedoraproject.org> ---
Created attachment 105999
  --> https://bugs.freedesktop.org/attachment.cgi?id=105999&action=edit
/sys/kernel/debug/dri/0/i915_opregion

Hi Jani,

Attached is the i915_opregion file you requested using a kernel built from your
opregion-didl branch.  I'm not sure if you were expecting it to fix the
brightness keys or not, but it doesn't.  The slider in GNOME still works.

Yes, DOD is returning more than 15 devices:

[    2.229265] i915 0000:00:02.0: More than 15 outputs detected via ACPI

In the ssdt7.dsl file, the firmware enumerates devices DD0-DDF and then an
additional device LCDD.  The LCDD device is what seems to be associated with
the function keys via the EC according to ACPI.  It gets a device ID of 0x400.

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