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
