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,
--
-- dag wieers, [log in to unmask], http://dag.wieers.com/
-- dagit linux solutions, [log in to unmask], http://dagit.net/
[Any errors in spelling, tact or fact are transmission errors]
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