HP c8000 Workstation Guia do Utilizador descarregar pdf (Página 23)

configuring X Windows on HP-UX (HP Visualize graphics cards)

X Server configuration

Chapter 2 21

determining swap performance

The DBE API does not allow users to determine if double-buffering in a

visual is through software or hardware. However, the API does provide a

way to determine relative swapping performance on a per-visual basis.

The XdbeScreenVisualInfo() function returns information about the

swapping performance levels for the double-buffering visuals on a

display. A visual with a higher performance level is likely to have better

double-buffer graphics performance than a visual with a lower

performance level. Nothing can be deduced from any of the following: the

magnitude of the difference of two performance levels, a performance

level in isolation, or comparing performance levels from different servers.

For more information, refer to the DBE man page on

XdbeScreenVisualInfo().

supported devices

The X Server supports DBE on the following devices:

• HP VISUALIZE-FX5 and FX10

• HP VISUALIZE-FXE

display power management signaling (DPMS)

Monitors constitute a large percentage of the power used by a

workstation even when not actively in use (i.e., 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 X Server features the ability to make use of DPMS on the following

graphics devices:

• HP VISUALIZE-FX5 and FX10

• HP VISUALIZE-FXE

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HP c8000 Workstation Guia do Utilizador Página 23