DPMSSetTimeouts - permits applications to set the timeout values used by the X
server for DPMS timings
cc [ flag ... ] file ... -lXext [ library ... ]
Display * display,
- Specifies the connection to the X server
- Specifies the new standby timeout in seconds
- Specifies the new suspend timeout in seconds
- Specifies the new off timeout in seconds
The DPMSSetTimeouts function permits applications to set the timeout values used
by the X server for Display Power Management Signaling (DPMS) timings.
The value standby
is the amount of inactivity time, in seconds, before
standby mode is invoked. The actual effects of this mode are dependent on the
characteristics of the monitor and frame buffer card. Standby mode is
implemented by shutting off the horizontal sync signal, and pulsing the
vertical sync signal. Standby mode provides the quickest monitor recovery
time. Note also that many monitors implement this mode identical to suspend
mode. A value of zero disables the standby mode.
The value suspend
is the amount of time of inactivity, in seconds, before
the second level of power savings is invoked. Suspend mode's physical and
electrical characteristics are implementation defined. For DPMS compliant
hardware, setting the suspend mode is implemented by pulsing the horizontal
sync signal and shutting off the vertical sync signal. In general, suspend
mode recovery is considered to be slower than standby mode, but faster than
off mode. However it may vary from monitor to monitor. As noted above, many
monitors implement this mode identical to the standby mode. A value of zero
disables this mode.
The value off
is the amount of time of inactivity,in seconds, before the
third and final level of power savings is invoked. Off mode's physical and
electrical characteristics are implementation defined. In DPMS compliant
hardware, it is implemented by shutting off both horizontal and vertical sync
signals, resulting in powering down of the monitor. Recovery time is
implementation dependent. Usually the recovery time is very close to the
power-up time of the monitor. A value of zero disables this mode.
mode occurs before or simultaneously with
mode, and suspend
mode must occur before or
simultaneously with off
mode. Therefore, non-zero mode timeout values
must be greater than or equal to the timeout values of earlier modes. If
inconsistent values are supplied, a BadValue error will result.
- The DPMSSetTimeouts function returns TRUE when the
function has succeeded.
- An argument is out of range.