HP Visualize J5000 HP Workstations - Graphics Administration Guide For Red Hat - Page 21

Shared memory extension (MIT_SHM), X*screens, MinimumMonitorPowerSaveLevel

View all HP Visualize J5000 manuals Add to My Manuals Save this manual to your list of manuals

• 
  1
• 
  2
• 
  3
• 
  4
• 
  5
• 
  6
• 
  7
• 
  8
• 
  9
• 
  10
• 
  11
• 
  12
• 
  13
• 
  14
• 
  15
• 
  16
• 
  17
• 
  18
• 
  19
• 
  20
• 
  21
• 
  22
• 
  23
• 
  24
• 
  25
• 
  26
• 
  27
• 
  28
• 
  29
• 
  30
• 
  31
• 
  32
• 
  33
• 
  34
• 
  35
• 
  36
• 
  37
• 
  38
• 
  39
• 
  40
• 
  41
• 
  42
• 
  43
• 
  44
• 
  45
• 
  46
• 
  47
• 
  48
• 
  49
• 
  50
• 
  51
• 
  52
• 
  53
• 
  54
• 
  55
• 
  56
• 
  57
• 
  58
• 
  59
• 
  60
• 
  61
• 
  62
• 
  63
• 
  64
• 
  65
• 
  66
• 
  67
• 
  68
• 
  69
• 
  70
• 
  71
• 
  72
• 
  73

Match case Limit results 1 per page

---

100% Actual Size Fit Width Fit Height Fit Page Automatic

Saver

(<1 sec)

1

Stand-by

Optional

Minimal

Short

2

Suspend

Mandatory

Substantial

Longer

3

Off

Mandatory

Maximum

System

Dependent

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

X*screens

file entry before starting the server:

MinimumMonitorPowerSaveLevel

<

level

>

Where <

level>

is replaced with the single digit 0, 1, 2, or 3 as specified in the

Level

column in the above table.

Shared memory extension (

MIT_SHM

)

The MIT shared memory extension provides both sharedmemory XImages and

shared-memory pixmaps based on the SYSV shared memory primitives.

Shared memory XImages are essentially a version of the XImage interface where

the actual image data is stored in a shared memory segment, and thus need not be

moved through the Xlib interprocess communication channel. For large images,

use of this facility can result in increased performance.

Shared memory pixmaps are a similar concept implemented for the pixmap

interface. Shared memory pixmaps are twodimensional arrays of pixels in a format

specified by the X server, where the pixmap data is stored in the shared memory

segment. In all other respects, shared memory pixmaps behave the same as

ordinary pixmaps and can be modified by the usual Xlib routines. In addition, it is

possible to change the contents of these pixmaps directly without the use of Xlib

routines merely by modifying the pixmap data.

Supported devices

The X server supports the MIT shared memory extension on the following

devices:

•

HP V

ISUALIZE

-FX

5

and FX

10

Graphics Administration Guide For Red Hat Linux 6.2