DOKK / manpages / debian 10 / libxext-dev / DPMSForceLevel.3.en
DPMSForceLevel(3) X FUNCTIONS DPMSForceLevel(3)

DPMSForceLevel - forces a DPMS capable display into the specified power level

cc [ flag ... ] file ... -lXext [ library ... ]
#include <X11/extensions/dpms.h>
Status DPMSForceLevel ( Display *display, CARD16 level );

Specifies the connection to the X server
Specifies the level to force power to

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.

The DPMSForceLevel function always returns TRUE.

A level other than DPMSModeOn, DPMSModeStandby, DPMSModeSuspend, or DPMSModeOff was specified.
BadMatch
DPMS is disabled on the specified display.

DPMSCapable(3), DPMSInfo(3), DPMSGetTimeouts(3), DPMSSetTimeouts(3)

libXext 1.3.3 X Version 11