Michael Jones wrote:
> On 07/14/2011 01:41 PM, Dag Wieers wrote:
>> On Thu, 14 Jul 2011, Michael Jones wrote:
>>
>>> Despite this radically overkill approach, the screen still turns
>>> off after around half an hour. I suspect that the reason is the
>>> monitors built in power saving features, which I believe should be
>>> prevented by the "xset -dpms" command, but doesn't appear to be.
>>>
>>> Does anyone have any ideas? Is there something that can be added
>>> to the xorg configuration to prevent the screen from turning off,
>>> perhaps?
>>
>> We have been investigating this somewhere in 2008 for a conference
>> (FrOSCon) with the aim of providing 2 large conference screens
>> directing people to various talks at the entrance (a bit like as you
>> can see at airports), but also for the various presentation computers
>> in the various rooms.
>>
>> Obviously, the first year having to provide input every hour to make
>> sure they didn't blank was not very much appeciated. (But hey,
>> CentOS+ELRepo actually worked on the hardware, in contract to latest
>> Fedora and Ubuntu) So our LiveUSB solution that was not designed for
>> it, was not tested for this kind of use.
>>
>> The next year I came up with the following configuration (tested on
>> CentOS 5), which worked:
>>
>> ### Disable screensaver start
>> gconftool-2 --direct
>> --config-source=xml:readwrite:/etc/gconf/gconf.xml.defaults -s -t
>> bool /apps/gnome_settings_daemon/screensaver/start_screensaver false
>> ### Disable screensaver locking
>> gconftool-2 --direct
>> --config-source=xml:readwrite:/etc/gconf/gconf.xml.defaults -s -t
>> bool /apps/gnome-screensaver/lock_enabled false
>> ### Disable screensaver altogether
>> gconftool-2 --direct
>> --config-source=xml:readwrite:/etc/gconf/gconf.xml.defaults -s -t
>> bool /apps/gnome-screensaver/idle_activation_enabled false
>> ### Increase screensaver idle time (max 2h, we set to 10h)
>> gconftool-2 --direct
>> --config-source=xml:readwrite:/etc/gconf/gconf.xml.defaults -s -t
>> bool /apps/gnome-screensaver/idle_delay 600
>> ### Disable DPMS screen blank on AC and battery
>> gconftool-2 --direct
>> --config-source=xml:readwrite:/etc/gconf/gconf.xml.defaults -s -t
>> string /apps/gnome-power-manager/ac_dpms_sleep_method off
>> gconftool-2 --direct
>> --config-source=xml:readwrite:/etc/gconf/gconf.xml.defaults -s -t
>> string /apps/gnome-power-manager/battery_dpms_sleep_method off
>> ### Disable Computer sleep when on AC and battery
>> gconftool-2 --direct
>> --config-source=xml:readwrite:/etc/gconf/gconf.xml.defaults -s -t
>> integer /apps/gnome-power-manager/ac_sleep_computer 0
>> gconftool-2 --direct
>> --config-source=xml:readwrite:/etc/gconf/gconf.xml.defaults -s -t
>> integer /apps/gnome-power-manager/battery_sleep_computer 0
>> ### Disable Display sleep when on AC and battery
>> gconftool-2 --direct
>> --config-source=xml:readwrite:/etc/gconf/gconf.xml.defaults -s -t
>> integer /apps/gnome-power-manager/ac_sleep_display 0
>> gconftool-2 --direct
>> --config-source=xml:readwrite:/etc/gconf/gconf.xml.defaults -s -t
>> integer /apps/gnome-power-manager/battery_sleep_display 0
>> ### Disable Dim-on-Idle
>> gconftool-2 --direct
>> --config-source=xml:readwrite:/etc/gconf/gconf.xml.defaults -s -t
>> bool /apps/gnome-power-manager/dim_on_idle false
>>
>> ### Other noblank features
>> cat <<EOF >/etc/X11/xinit/xinitrc.d/noblank.sh
>> echo "Disable screen blanking for $TERM and $DISPLAY"
>> setterm -powersave off -blank 0
>> #xset -dpms
>> xset dpms 0 0 0
>> xset s noblank
>> xset s off
>> EOF
>> chmod 0755 /etc/X11/xinit/xinitrc.d/noblank.sh
>>
>> It is quite possible some things are redundant, but once it worked I
>> wasn't very interested to find those items that were not helping the
>> cause ;-)
>>
>> Hope this works for you. Do let me know if you can improve this scheme !
>>
>> Kind regards,
>
> This does indeed work! I'm going to hand it off to the rest of our
> software staff for integration and any necessary improvements. If I
> hear of any changes that seem useful to others, I'll certainly pass
> them along.
>
> Thanks a bunch!
>
> Michael Jones
> Software Engineer
> CyberMetrix
> 2860 N National Rd #A
> Columbus, IN 47201-4746 USA
> 812-375-5868
Just an observation, but depending on what you need displayed and
interacted with, you could consider running a more trimmed WM or none at
all. This would drop all of the gconf settings and leave you with
simply dealing with the xset/DPMS features of the X server.
-Mark
--
Mr. Mark V. Stodola
Digital Systems Engineer
National Electrostatics Corp.
P.O. Box 620310
Middleton, WI 53562-0310 USA
Phone: (608) 831-7600
Fax: (608) 831-9591
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