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Accepted
Craig Constantine
Asked: 2011-11-08 09:23:18 +0800 CST

How to DISable display sleep on Dell PowerEdge R310

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The display on these PowerEdge systems goes to sleep after some period of time. Normally, when you plug in a KVM, you have to press a key to "wake up" the display. I'm connecting these servers to a KVM switch, and I'd like the display to NOT go to sleep -- so when you select a system via the KVM switch you immediately see the console display. OS on these boxes is Linux, Ubuntu Lucid (10.04).

linux electrical-power dell-poweredge

1 Answers

  1. Best Answer

    With X11 you want to disable DPMS in /etc/X11/xorg.conf. 

    #In the "Monitor" section, you need a line like:
        Option          "DPMS"
#Then, in the "ServerLayout" section (for Xorg 7.2 and later, make a
#separate ServerFlags section instead), include lines like this:
        Option          "BlankTime"     "0"
        Option          "StandbyTime"   "0"
        Option          "SuspendTime"   "0"
        Option          "OffTime"       "0"

#Alternatively try this in the Monitor section:
        Option          "DPMS"          "False"

    Mostly from: http://www.shallowsky.com/linux/x-screen-blanking.html

    From outside of X11 with a login sessions you could do the following:

    setterm -blank 0
setterm -powersave off

    From outside of X11 without a login session you can use the following kernel parameters in your boot loader:

    consoleblank=   [KNL] The console blank (screen saver) timeout in
                seconds. Defaults to 10*60 = 10mins. A value of 0
                disables the blank timer.
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