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I modified /etc/rc.local to set the brightness, but however when I suspend and wake it up, its brightness always reset to maximum. What's wrong, and how can I fix it?

  • That's funny because mine occasionally resets to minimum when waking up. – Jeff Puckett Mar 22 '17 at 12:54
  • You are experiencing the wonders of Power Management. Read man pm-action. It will show you how Ubuntu suspends and wakes up, and where to put your intervention to fix brightness. – waltinator Mar 22 '17 at 14:22
  • I can't say why your brightness was resetting to min or max. But this will set brightness to your preferred setting automatically based on sunrise and sunset: askubuntu.com/questions/894460/… – WinEunuuchs2Unix Mar 23 '17 at 2:07

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