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Thread: Preventing screen blank on 12.04 + Cinnamon

  1. #1
    Join Date
    Feb 2008
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    3

    Preventing screen blank on 12.04 + Cinnamon

    Hi,

    Can anyone tell me how to totally disable all monitor blanking and power-saving in Ubuntu 12.04?

    I'm using a fresh install of Ubuntu 12.04 with Cinnamon 1.4 as the basis for locked-down OPAC web terminals in a public library.

    The combination of 12.04 and Cinnamon is *spot on* apart from one problem.

    The screen blanks after a while, even though I've set the "turn screen off" option in gnome-control-center (System Settings) to "never". I've also tried setting gconf settings as per this post:

    Disable Screensaver (Black Screen) in Ubuntu 12.04 (Precise Pangolin)

    I've also trawled through dconf and gconf for Cinnamon-specific entries that might change power settings, but so far haven't found anything.

    I can verify that the settings persist after a reboot, that's fine. But the screens continue to go blank when not used. As these are always-on web kiosks, I'm really hoping to find a fix.

    Any ideas? Thanks in advance!
    Last edited by freemanlowell; July 3rd, 2012 at 07:39 AM.

  2. #2
    Join Date
    Feb 2008
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    4,226
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: Preventing screen blank on 12.04 + Cinnamon

    Use System Settings, Brightness and Lock.

    Perhaps, as well, System Settings, Power-- Don't suspend.

  3. #3
    Join Date
    Feb 2008
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    3

    Re: Preventing screen blank on 12.04 + Cinnamon

    Quote Originally Posted by gordintoronto View Post
    Use System Settings, Brightness and Lock.

    Perhaps, as well, System Settings, Power-- Don't suspend.
    I've tried both of those, as well as the gsettings changes I mentioned above. All the power settings look right, and the settings persist after a reboot, but the screen still goes blank on idle. It's really weird.

  4. #4
    Join Date
    Apr 2008
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    10,346

    Re: Preventing screen blank on 12.04 + Cinnamon

    I have not tried it with Cinnamon, in fact I haven't tried Cinnamon at all, but you might want to try Caffeine:

    https://launchpad.net/~caffeine-developers/+archive/ppa

    I use it both in Unity and classic, and there's a brief description in step #12 of my classic (no effects) guide here:

    http://ubuntuforums.org/showthread.php?t=1966370

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