Red Hat LINUX 7.2 - OFFICIAL LINUX CUSTOMIZATION GUIDE Guida di Installazione Scaricare il pdf (Pagina 101)

Chapter 7. X Servers and Clients 101

the installation process. If you use Xconfigurator to reconﬁgure a new video card, both conﬁgura-

tion ﬁles are regenerated.

The conﬁguration ﬁles are made up by a collection of sections, each of which deﬁnes a particular

aspect of the XFree86 server’s operation. Many of the conﬁguration sections are similar in both ﬁles,

however there are many differences also. One notable difference is that the XF86Config-4 conﬁgu-

ration ﬁle used by the XFree86 4 server contains new sections such as ServerLayout and Module,

that are not found in the version 3 conﬁguration ﬁle. The XFree86 4 server allows the usage of multi-

ple input devices, such as mice, keyboards, and drawing tablets. Each input device is presented in its

own InputDevice section, where it is assigned an identifying name that tells you about the device.

The XFree86 3 server conﬁgures the mouse and keyboard via the directives Keyboard and Pointer.

While there is rarely a need to manually edit these ﬁles, it is useful to know about the various sections

and optional parameters found in them.

Each section begins with a Section "

section-name " line and ends with an EndSection line.

Within each of the sections, you will ﬁnd several lines containing an option name and at least one op-

tion value, occasionally seen in quotes. Given the similarities between the two types of conﬁguration

ﬁles, the following list explores the most useful sections of an XFree86 version 4 ﬁle and the roles of

various popular settings.

Device

Speciﬁes information about the video card used by the system. You must have at least one De-

vice section in your conﬁguration ﬁle. You may have multiple Device sections in the case of

multiple video cards or multiple settings that can run a single card. The following options are

required or widely used:

• BusID — Speciﬁes the bus location of the video card. This option is only necessary for sys-

tems with multiple cards and must be set so that the Device section will use the proper settings

for the correct card.

• Driver — Tells XFree86 which driver to load in order to use the video card.

• Identifier — Provides a unique name for this video card. Usually, this name is set to the

exact name of the video card used in the Device section.

• Screen — An optional setting used when a video card has more than one head, or connector,

to go out to a separate monitor. If you have multiple monitors connected to one video card,

separate Device sections must exist for each of them with a different Screen value for each

Device section. The value accepted by this option is a number starting at 0 and increasing by

one for each head on the video card.

• VideoRam — The amount of RAM available on the video card in kilobytes. This setting is not

normally necessary since the XFree86 server can usually probe the video card to autodetect

the amount of video RAM. But since there are some video cards XFree86 cannot correctly

autodetect, this option allows you to specify the amount of video RAM.

DRI

Direct Rendering Infrastructure (DRI) is an interface which primarily allows 3D software ap-

plications to take advantage of the 3D hardware acceleration capabilities on modern supported

video hardware. In addition, DRI can improve 2D hardware acceleration performance when us-

ing drivers that have been enhanced to use the DRI for 2D operations. This section is ignored

unless DRI is enabled in the Module section.

Since different video cards use DRI in different ways. Before changing any DRI values, read the

/usr/X11R6/lib/X11/doc/README.DRI ﬁle for speciﬁc information about your particular

video card.

1 2 ... 96 97 98 99 100 101 102 103 104 105 106 ... 281 282

Commenti su questo manuale

Nessun commento

Red Hat LINUX 7.2 - OFFICIAL LINUX CUSTOMIZATION GUIDE Guida di Installazione Pagina 101

Commenti su questo manuale

Prodotti e manuali riguardandi Software di system management Red Hat LINUX 7.2 - OFFICIAL LINUX CUSTOMIZATION GUIDE