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Operating Systems Linux Red Hat command line tool to disable screen lock and/or screen saver Post 302566606 by cjcox on Thursday 20th of October 2011 04:43:43 PM
Old 10-20-2011
There's no portable way to do this. You can target a particular screen locker and often times they will have an option or way to send a message to the screen locker to stop locking. Some desktop screen lockers will look for particular power mgmt profiling to determine if they should lock or not.

If you want to disable it permanently, you should be able to do this in System -> Preferences -> Screensaver. Then you could manually lock your screen when you feel it is needed.

Since you're saying RHEL 5.4, you can send the gnome-screensaver a dbus message to inhibit locking with:

dbus-send --session --dest=org.gnome.ScreenSaver --type=method_call --print-reply --reply-timeout=20000 /org/gnome/ScreenSaver org.gnome.ScreenSaver.Inhibit string:"myshell" string:"I have no reason for doing this"

That command will return an integer string (cookie)... use that to UnInhibit

dbus-send --session --dest=org.gnome.ScreenSaver --type=method_call --print-reply --reply-timeout=20000 /org/gnome/ScreenSaver org.gnome.ScreenSaver.UnInhibit uint32:<the-integer-returned-from-the-inhibit>


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XSetScreenSaver(3X11)													     XSetScreenSaver(3X11)

XSetScreenSaver, XForceScreenSaver, XActivateScreenSaver, XResetScreenSaver, XGetScreenSaver - manipulate the screen saver SYNOPSIS
XSetScreenSaver(display, timeout, interval, prefer_blanking, allow_exposures) Display *display; int timeout, interval; int prefer_blanking; int allow_exposures; XForceScreenSaver(display, mode) Display *display; int mode; XActivateScreenSaver(display) Display *display; XResetScreenSaver(display) Display *display; XGetScreenSaver(display, timeout_return, interval_return, prefer_blanking_return, allow_exposures_return) Display *display; int *timeout_return, *interval_return; int *prefer_blanking_return; int *allow_exposures_return; ARGUMENTS
Specifies the screen save control values. You can pass DontAllowExposures, AllowExposures, or DefaultExposures. Returns the current screen save control value (DontAllowExposures, AllowExposures, or DefaultExposures). Specifies the connection to the X server. Specifies the interval, in seconds, between screen saver alterations. Returns the interval between screen saver invocations. Specifies the mode that is to be applied. You can pass ScreenSaverActive or ScreenSaverReset. Specifies how to enable screen blanking. You can pass DontPreferBlank- ing, PreferBlanking, or DefaultBlanking. Returns the current screen blanking preference (DontPreferBlanking, PreferBlanking, or Default- Blanking). Specifies the timeout, in seconds, until the screen saver turns on. Returns the timeout, in seconds, until the screen saver turns on. DESCRIPTION
Timeout and interval are specified in seconds. A timeout of 0 disables the screen saver (but an activated screen saver is not deactivated), and a timeout of -1 restores the default. Other negative values generate a BadValue error. If the timeout value is nonzero, XSetScreenSaver enables the screen saver. An interval of 0 disables the random-pattern motion. If no input from devices (keyboard, mouse, and so on) is generated for the specified number of timeout seconds once the screen saver is enabled, the screen saver is activated. For each screen, if blanking is preferred and the hardware supports video blanking, the screen simply goes blank. Otherwise, if either exposures are allowed or the screen can be regenerated without sending Expose events to clients, the screen is tiled with the root window background tile randomly re-origined each interval seconds. Otherwise, the screens' state do not change, and the screen saver is not acti- vated. The screen saver is deactivated, and all screen states are restored at the next keyboard or pointer input or at the next call to XForceScreenSaver with mode ScreenSaverReset. If the server-dependent screen saver method supports periodic change, the interval argument serves as a hint about how long the change period should be, and zero hints that no periodic change should be made. Examples of ways to change the screen include scrambling the col- ormap periodically, moving an icon image around the screen periodically, or tiling the screen with the root window background tile, ran- domly re-origined periodically. XSetScreenSaver can generate a BadValue error. If the specified mode is ScreenSaverActive and the screen saver currently is deactivated, XForceScreenSaver activates the screen saver even if the screen saver had been disabled with a timeout of zero. If the specified mode is ScreenSaverReset and the screen saver currently is enabled, XForceScreenSaver deactivates the screen saver if it was activated, and the activation timer is reset to its initial state (as if device input had been received). XForceScreenSaver can generate a BadValue error. The XActivateScreenSaver function activates the screen saver. The XResetScreenSaver function resets the screen saver. The XGetScreenSaver function gets the current screen saver values. DIAGNOSTICS
Some numeric value falls outside the range of values accepted by the request. Unless a specific range is specified for an argument, the full range defined by the argument's type is accepted. Any argument defined as a set of alternatives can generate this error. SEE ALSO
Xlib -- C Language X Interface XSetScreenSaver(3X11)

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