HP Workstation zx2000 HP Graphics Administration Guide for HP-UX 11.X (IPF ver - Page 29

States defined by VESA, Level, State, DPMS Compliance, Requirements, Power, Savings, Recovery Time

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configuring an X Server on HP-UX Level State States defined by VESA DPMS Compliance Power Requirements Savings Recovery Time 0 Screen Saver Not Applicable None Very Short (

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Graphics Administration Guide
4–17
configuring an X Server on HP-UX
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.
By default, the DPMS level used is the Screen Saver (i.e. no power savings). If you wish to use
power saving during screen blanking, set the following XF86Config file entries before starting
the server:
blank time
,
standby time
,
suspend time
, and
off time
.
The DPMS Extension lets individual users customize their personal DPMS settings to meet their
work styles and any restrictions imposed by their employers. For example, an employer may
decide that all monitors must save power after 30 minutes of idle time. The individual user may
decide that 30 minutes is too long, and adjust the time downward to meet their work preference.
More information (including sample code) on the DPMS Extension entry points can be found
online, via the manual pages.
The extension entry points are:
DPMS
DPMSQueryExtension
DPMSGetVersion
DPMSCapable
DPMSSetTimeouts
DPMSGetTimeouts
DPMSEnable
DPMSDisable
DPMSForceLevel
DPMSInfo
XFree86 provides four options that may be set in the ServerLayout section that may be used to
support this functionality. The options are: blank time, standby time, suspend time, and off time.
The following example sets these to 10, 20, 30, and 60 minutes respectively.
Section “ServerLayout”
. . .
Option
“BlankTime”
“10”
Option
“StandbyTime”
“20”
Option
“SuspendTime”
“30”
Option
“OffTime”
“60”
. . .
EndSection
States defined by VESA
Level
State
DPMS Compliance
Requirements
Power
Savings
Recovery Time
0
Screen Saver
Not Applicable
None
Very Short (<1 sec)
1
Standby
Optional
Minimal
Short
2
Suspend
Mandatory
Substantial
Longer
3
Off
Mandatory
Maximum
System Dependent