1

I am following these instructions verbatim

http://www.dell.com/support/article/us/en/04/sln308123/how-to-configure-the-keyboard-backlight-time-out-interval-in-ubuntu-linux?lang=en

I open the file using sudo, with either nano or sublime text as my text editor. I modify the file from 0s to 100s, and then save, but then when I reopen the file, it's always back to 0s...wtf.

Anybody know why that might happen?

  • I went all out and just did sudo chmod 777 <file> and still cannot modify it – Alexander Mills Jan 15 '18 at 0:38
  • I event logged in as root with sudo su and still cannot modify the file – Alexander Mills Jan 15 '18 at 0:41
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Turns out, if you read the article it says:

NOTE: If AC power is plugged in you will always see 0s in the file, however, it will keep the same setting for both on AC power and on battery power

D'OH!

so I unplugged my computer, then modified the value, and the modifications actually showed up, so that's good. Then I plugged in my computer again and it went back to 0s. So all makes sense now...

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