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dpmsforcelevel(3) [debian man page]

DPMSForceLevel(3)						    X FUNCTIONS 						 DPMSForceLevel(3)

NAME
DPMSForceLevel - forces a DPMS capable display into the specified power level SYNOPSIS
cc [ flag ... ] file ... -lXext [ library ... ] #include <X11/extensions/dpms.h> Status DPMSForceLevel ( Display *display, CARD16 level ); ARGUMENTS
display Specifies the connection to the X server level Specifies the level to force power to DESCRIPTION
The DPMSForceLevel function forces a DPMS capable display into the specified power level. The level must be one of following four states: DPMSModeOn, DPMSModeStandby, DPMSModeSuspend, or DPMSModeOff. Values other than these will result in a BadValue error. If DPMS is disabled on the display, trying to set the power level on the display will result in a BadMatch protocol error. RETURN VALUES
TRUE The DPMSForceLevel function always returns TRUE. ERRORS
BadValue A level other than DPMSModeOn, DPMSModeStandby, DPMSModeSuspend, or DPMSModeOff was specified. BadMatch DPMS is disabled on the specified display. SEE ALSO
DPMSCapable(3), DPMSInfo(3), DPMSGetTimeouts(3), DPMSSetTimeouts(3) X Version 11 libXext 1.3.1 DPMSForceLevel(3)

Check Out this Related Man Page

DPMSEnable(3)							    X FUNCTIONS 						     DPMSEnable(3)

NAME
DPMSEnable - enables DPMS on the specified display SYNOPSIS
cc [ flag ... ] file ... -lXext [ library ... ] #include <X11/extensions/dpms.h> Status DPMSEnable ( Display *display ); ARGUMENTS
display Specifies the connection to the X server DESCRIPTION
The DPMSEnable function enables Display Power Management Signaling (DPMS) on the specified display. When DPMS is enabled, DPMS will use the currently saved timeout values. It will trigger the appropriate DPMS power level based on the timeout values. Refer to DPMSSetTimeouts. All physical screens are affected by DPMSEnable at the same time. If DPMSEnable is invoked on a display which has DPMS already enabled, or on a display which does not support DPMS, no change is made and no error is returned. RETURN VALUES
TRUE The DPMSEnable function always returns TRUE. SEE ALSO
DPMSCapable(3), DPMSDisable(3), DPMSGetTimeouts(3), DPMSSetTimeouts(3) X Version 11 libXext 1.0.5 DPMSEnable(3)
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