I'm not sure what the etiquette is about "me too" comments in this Bugzilla instance, but I see the same behavior on a Lenovo Thinkpad T440s: /sys/class/backlight/intel_backlight is present but xbacklight simply says "No outputs have backlight property" when I try to run it. I have not installed the intel driver so I'm using modesetting by default.
I'm not sure what the etiquette is about "me too" comments in this Bugzilla instance, but I see the same behavior on a Lenovo Thinkpad T440s: /sys/class/ backlight/ intel_backlight is present but xbacklight simply says "No outputs have backlight property" when I try to run it. I have not installed the intel driver so I'm using modesetting by default.