There is solution for 12.10, but it doesn't work for 13.04.(Build from 28February)

Any idea what is wrong with 13.04 version and how to fix it?

Additional info: In /sys/class/backlight/ I have: ideapad and intel_backlight, no signs of acpi_video0

  • 13.04 is not fully baked yet. Questions about future versions are off topic. – user68186 Mar 1 '13 at 14:53
  • Hi and welcome to Ask Ubuntu - as per the FAQ, alpha/beta issues are off-topic. You can receive help as per this Q&A - askubuntu.com/questions/18641/… – fossfreedom Mar 1 '13 at 14:55