[Bug 92943] backlight turned off after sleep resume

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=92943

--- Comment #17 from Jani Nikula <jani.nikula at intel.com> ---
After resume:

[   63.147738] [drm:intel_edp_backlight_on] 
[   63.147739] [drm:intel_panel_enable_backlight] pipe A
[   63.147742] [drm:intel_panel_actually_set_backlight] set backlight PWM =
1480

bl_power gets set to 0 at this point (that means "on").

And a bit later:

[   63.803210] [drm:intel_backlight_device_update_status] updating
intel_backlight, brightness=1441/4794
[   63.803213] [drm:intel_panel_actually_set_backlight] set backlight PWM =
1480
[   63.803219] [drm:intel_edp_backlight_power] panel power control backlight
disable

This is a request from userspace to set bl_power to 4 (that means "off"). It's
not a kernel issue.

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