On Ubuntu 14.10 Utopic, using a Samsung Notebook laptop, I can change the brightness correctly and it is remembered upon wake from sleep.

However my problem is that when my laptop is on battery and I plug it into a power source, the brightness returns to full and remains there even when I unplug it!

When I press a brightness key, it then suddenly remembers and then jumps back to what it should be.

How do I get rid of this annoying behaviour?

Note: I am using TLP.

  • Note: This problem is fixed as of 15.04, just upgrade. – Robobenklein May 3 '15 at 16:15
  • 1
    You should make that an answer, not a comment! ;-) – Fabby May 4 '15 at 9:58

This problem with brightness has been corrected as of 15.04, upgrading is the easiest fix.

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