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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:

Code:
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

Code:
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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dbus-send(1)						      General Commands Manual						      dbus-send(1)

NAME
dbus-send - Send a message to a message bus SYNOPSIS
dbus-send [--system | --session] [--dest=NAME] [--print-reply[=literal]] [--reply-timeout=MSEC] [--type=TYPE] OBJECT_PATH INTERFACE.MEMBER [CONTENTS ...] DESCRIPTION
The dbus-send command is used to send a message to a D-Bus message bus. See http://www.freedesktop.org/software/dbus/ for more information about the big picture. There are two well-known message buses: the systemwide message bus (installed on many systems as the "messagebus" service) and the per-user-login-session message bus (started each time a user logs in). The --system and --session options direct dbus-send to send mes- sages to the system or session buses respectively. If neither is specified, dbus-send sends to the session bus. Nearly all uses of dbus-send must provide the --dest argument which is the name of a connection on the bus to send the message to. If --dest is omitted, no destination is set. The object path and the name of the message to send must always be specified. Following arguments, if any, are the message contents (mes- sage arguments). These are given as type-specified values and may include containers (arrays, dicts, and variants) as described below. <contents> ::= <item> | <container> [ <item> | <container>...] <item> ::= <type>:<value> <container> ::= <array> | <dict> | <variant> <array> ::= array:<type>:<value>[,<value>...] <dict> ::= dict:<type>:<type>:<key>,<value>[,<key>,<value>...] <variant> ::= variant:<type>:<value> <type> ::= string | int16 | uint 16 | int32 | uint32 | int64 | uint64 | double | byte | boolean | objpath D-Bus supports more types than these, but dbus-send currently does not. Also, dbus-send does not permit empty containers or nested con- tainers (e.g. arrays of variants). Here is an example invocation: dbus-send --dest=org.freedesktop.ExampleName /org/freedesktop/sample/object/name org.freedesktop.ExampleInterface.ExampleMethod int32:47 string:'hello world' double:65.32 array:string:"1st item","next item","last item" dict:string:int32:"one",1,"two",2,"three",3 variant:int32:-8 objpath:/org/freedesktop/sample/object/name Note that the interface is separated from a method or signal name by a dot, though in the actual protocol the interface and the interface member are separate fields. OPTIONS
The following options are supported: --dest=NAME Specify the name of the connection to receive the message. --print-reply Block for a reply to the message sent, and print any reply received in a human-readable form. --print-reply=literal Block for a reply to the message sent, and print the body of the reply. If the reply is an object path or a string, it is printed literally, with no punctuation, escape characters etc. --reply-timeout=MSEC Wait for a reply for up to MSEC milliseconds. The default is implementation-defined, typically 25 seconds. --system Send to the system message bus. --session Send to the session message bus. (This is the default.) --type=TYPE Specify method_call or signal (defaults to "signal"). AUTHOR
dbus-send was written by Philip Blundell. BUGS
Please send bug reports to the D-Bus mailing list or bug tracker, see http://www.freedesktop.org/software/dbus/ dbus-send(1)

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