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Thread: Monitor Backlight comes back on after DPMS offf

  1. #1
    Join Date
    Jan 2008

    Monitor Backlight comes back on after DPMS offf

    After upgrading to Mythbuntu 10.10 from 9.10 (clean install) on my combined front/backend I cannot get monitor (Dell 3007) to switch off from remote, I have been using simple script to DPMS force off for years with no problems, it still works, but some random time later the backlight comes back on.
    I have tryed the more complex scripts that stop and start the frontend and all of the acpi_osi options. Disabling screensaver has no effect.
    Any suggestions what causes this, or how to fix?
    Sysem is Abit IP35e (I suspect this board is the problem)
    Core 2 duo 6800
    4 Gb RAM
    Leadtech DVH 2000
    2 off Hauppauge Nova T500
    Gigabyte 9600GT

    I have 2 remote frontends both upgraded OK
    I have tryed installing 10.10 on a 'scrap' P4 machine, DPMS off works fine on it.
    I would try another install and/or another MoBo but its the only TV system in the house now.

  2. #2
    Join Date
    Mar 2006

    Re: Monitor Backlight comes back on after DPMS offf

    Ever find a solution?

  3. #3
    Join Date
    Mar 2006

    Re: Monitor Backlight comes back on after DPMS offf

    I finally figured it out on mine. It seems to be a mouse issue waking up the dpms off. You'll need to find out what input to turn off to disable the mouse.
    xinput -list
    ⎡ Virtual core pointer                    	id=2	[master pointer  (3)]
    ⎜   ↳ Virtual core XTEST pointer              	id=4	[slave  pointer  (2)]
    ⎜   ↳ ImPS/2 ALPS GlidePoint                  	id=12	[slave  pointer  (2)]
    ⎣ Virtual core keyboard                   	id=3	[master keyboard (2)]
        ↳ Virtual core XTEST keyboard             	id=5	[slave  keyboard (3)]
        ↳ Power Button                            	id=6	[slave  keyboard (3)]
        ↳ Video Bus                               	id=7	[slave  keyboard (3)]
        ↳ Power Button                            	id=8	[slave  keyboard (3)]
        ↳ Sleep Button                            	id=9	[slave  keyboard (3)]
        ↳ Laptop_Integrated_Webcam_3M             	id=10	[slave  keyboard (3)]
        ↳ AT Translated Set 2 keyboard            	id=11	[slave  keyboard (3)]
        ↳ Dell WMI hotkeys                        	id=13	[slave  keyboard (3)]
    I use input 12 to turn off the trackpad.

    Script: screenmouseoff
    xinput set-prop 12 "Device Enabled" 0
    xscreensaver-command -lock
    sleep 5
    xset dpms force off
    sleep 5
     STATUS=$(xset -q | grep "Monitor is" | awk '{print $3}')
     while [ $STATUS == "Off" ]
            sleep 7
            STATUS=$(xset -q | grep "Monitor is" | awk '{print $3}')
    xinput set-prop 12 "Device Enabled" 1
    I throw that script into /usr/bin

    Then I modify /usr/share/acpi-support/screenblank

    if [ `pidof xscreensaver` ]; then
            su $user -c "(xscreensaver-command -throttle)"
                    if [ x$LOCK_SCREEN = xtrue ]; then
                    su $user -c "(/usr/bin/screenmouseoff)" # Using the new good script
    elif [ `pidof dcopserver` ]; then
            dcop kdesktop KScreensaverIface lock
    if [ x$RADEON_LIGHT = xtrue ]; then
        [ -x /usr/sbin/radeontool ] && radeontool light off

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