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-   -   LCD monitor doesn't enter Standby on Lock Screen (https://www.linuxquestions.org/questions/linux-desktop-74/lcd-monitor-doesnt-enter-standby-on-lock-screen-844225/)

xp_newbie 11-14-2010 02:22 PM
LCD monitor doesn't enter Standby on Lock Screen
 
When my Ubuntu 8.04 system used to be connected to a CRT monitor, 'Lock Screen' would make the CRT enter Standby after some delay.

This is no longer the case when the same system is connected to a new LCD screen.

I would have thought that this is the monitor's problem, not a Linux one, but when the system boots and waits at the Login screen (GUI), the monitor does enter Standby after a few minutes of inactivity.

To me this suggests a GNOME Desktop issue.

Is there any way to set GNOME to put the monitor into Standby?

stress_junkie 11-14-2010 02:44 PM
It could be a setting in your monitor. However, the Gnome Power Management Manual says this:
Quote:
8.3. 
My monitor is broken and treats DPMS standby and off states as
'no-signal' which leaves the monitor powered on.

You have to change the DPMS suspend mode GNOME Power Manager uses.
Open gconf-editor, and then change the keys
/apps/gnome-power-manager/backlight/dpms_method_ac and
/apps/gnome-power-manager/backlight/dpms_method_battery
to one of the modes that work, e.g. standby, suspend or off.
I found this by clicking on System -> Help and Support, then entering DPMS in a search box. It is not your exact question but the answer may be correct for your question.

xp_newbie 11-15-2010 09:57 AM
Quote:
Originally Posted by stress_junkie (Post 4158703)
It is not your exact question but the answer may be correct for your question.
Thank you. As you suspected, modifying these settings didn't really help. I tried:
Code:
sudo gconf-editor
 > apps
  > gnome-power-manager
    > backlight
      > dpms_method_ac:  from 'default' to 'off'
      > idle_brightness: from '30 to '0'
      > idle_dim_time:  from '30 to '1'
But that didn't change a thing. Perhaps additional settings need to be modified.


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