I have a monitor which was properly switched off by my Debian PC when unused. I attached it to another machine and, this times, it is never switched off.

In /etc/X11/xorg.conf, I have:

Section "Monitor"
        Identifier      "Generic Monitor"
        Option          "DPMS"

It is recognized when X11 starts:

(II) Loading extension DPMS
(II) VESA(0): DPMS capabilities: StandBy Suspend Off; RGB/Color Display
(**) Option "dpms"
(**) VESA(0): DPMS enabled

The operating system is Debian 5 (Lenny). The graphics card is:

00:02.0 VGA compatible controller: Intel Corporation 82G33/G31 Express Integrate
d Graphics Controller (rev 02) (prog-if 00 [VGA controller])
        Subsystem: Hewlett-Packard Company Device 2a6f
        Flags: bus master, fast devsel, latency 0, IRQ 5
        Memory at fe900000 (32-bit, non-prefetchable) [size=512K]
        I/O ports at b080 [size=8]
        Memory at d0000000 (32-bit, prefetchable) [size=256M]
        Memory at fe800000 (32-bit, non-prefetchable) [size=1M]
        Capabilities: [90] Message Signalled Interrupts: Mask- 64bit- Queue=0/0  Enable-Capabilities: [d0] Power Management version 2

X11 is:

X.Org X Server 1.4.2
Release Date: 11 June 2008
X Protocol Version 11, Revision 0
Build Operating System: Linux Debian (xorg-server 2:1.4.2-10.lenny2)
Current Operating System: Linux ludwigVII 2.6.26-2-686 #1 SMP Sun Jun 21 04:57:3
8 UTC 2009 i686
Build Date: 08 June 2009  09:12:57AM
  • related? Jan 16, 2011 at 11:05
  • 7
    Does the monitor switch off if you run xset dpms force off? What is the output of xset q | grep -A1 DPMS? Jan 16, 2011 at 12:26
  • 1
    Answers to Gilles' questions are in deleted comments (xset dpms force off doesn't work, and the xset output is Standby: 240 Suspend: 450 Off: 900 DPMS is Enabled Monitor is On). The last comment suggested a hardware problem but never got a reply, so without that I'm going to call this question abandoned and close it Feb 13, 2012 at 20:46
  • @Gilles I have this same problem. The monitor turns off briefly (not even for a second) then comes back on and the screen stays blank. I know it turns off because of the LED animation that my monitor does. Almost immediately afterward, the monitor comes back on.
    – doug65536
    Jul 18, 2013 at 2:12
  • @doug65536 This question has been abandoned for years. You should ask a new question with all the details of your problem (which may be the same, or may only have similar symptoms). Jul 18, 2013 at 9:40


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