Graphics Administration Guide (October 2009)

# Set the default depth.
#
DefaultDepth 24
#
# The subsection associates a buffer depth with a screen size.
#
SubSection "Display"
Depth 24
Modes "1280x1024"
EndSubSection
EndSection
extensions
double buffer extension (DBE)
DBE is an extension to the X Server that provides a double-buffering API. For more information
about DBE and the API, consult the DBE man pages:
DBE
XdbeQueryExtension
XdbeGetVisualInfo
XdbeFreeVisualInfo
XdbeScreenVisualInfo
XdbeAllocateBackBufferName
XdbeDeallocateBackBufferName
XdbeSwapBuffers
XdbeBeginIdiom
XdbeEndIdiom
XdbeGetBackBufferAttributes
display power management signaling (DPMS)
Monitors constitute a large percentage of the power used by a workstation even when not actively
in use (namely, during screen blanking). In order to reduce the power consumption, the Video
Electronic Standards Association (VESA) has defined a Display Power Management Signaling
(DPMS) standard which can be used to greatly reduce the amount of power being used by a
monitor during screen blanking.
The following table is a description of the states that are defined by VESA. The Power Savings
column indicates (roughly) the level of power savings achieved in the given state. The Recovery
Time is the amount of time that the screen takes to return from a power saving state to an ON
state (by pressing a key or the moving the mouse).
Table 2-4 DPMS Levels
Recovery TimePower SavingsStateLevel
NoneNoneOn0
ShortMinimalStandby1
LongerSubstantialSuspend2
System DependentMaximumOff3
The actual amount of power saved and the recovery time for each of the states is monitor
dependent and may vary widely. The customer can compensate for this by choosing an
appropriate level for the monitor that is currently in use.
22 configuring X Server on HP-UX (OEM graphics cards)