I'm also seeing this in Raring alpha 2:
System baseline power is estimated at 4.05 W
Power est. Usage Device name
1.44 W 6.6% Display backlight
1.34 W 0.0% Display backlight
294 mW 2.7% CPU use
powertop:
Installed: 2.1-0ubuntu1
Candidate: 2.1-0ubuntu1
Version table:
*** 2.1-0ubuntu1 0
500 http://archive.ubuntu.com/ubuntu/ raring/main amd64 Packages
100 /var/lib/dpkg/status
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https://bugs.launchpad.net/bugs/949221
Title:
powertop incorrectly reports multiple display brightness devices to
use power
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