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<TITLE>Linux Configuration and Installation:Installing and Configuring XFree86</TITLE>

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<!--ISBN=1558285660//-->

<!--TITLE=Linux Configuration and Installation//-->

<!--AUTHOR=Patrick Volkerding//-->

<!--AUTHOR=Kevin Reichard//-->

<!--AUTHOR=Eric Foster//-->

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<P><BR></P>

<H4 ALIGN="LEFT"><A NAME="Heading14"></A><FONT COLOR="#000077">Configuring the Pointer Section</FONT></H4>

<P>The mouse&#151;called <I>pointer</I> in X terminology&#151;is rather easy to set up, but you must watch out for some tricks. The main reason for this is that many vendors&#146; mice (e.g., Logitech) are set up to emulate other vendors&#146; mice, most notably Microsoft mice. Because of this, you may have to lie about your mouse.</P>

<P>For example, one of our test systems uses a serial Logitech Firstmouse. This mouse was designed by Logitech to emulate the Microsoft serial mouse. What&#146;s odd is that the Logitech mouse has three buttons (a very good thing for X, as most X programs expect three-button mice), while the Microsoft serial mouse sports only two buttons.</P>

<P>When we configure the <B>XF86Config</B> file, we claim our Logitech mouse is really a Microsoft mouse (the other common choice for Logitech mice is to claim that they are Mouseman mice).</P>

<P>The two key things you must specify for your Pointer section is what kind of mouse, e.g., Microsoft, and what port, if it&#146;s a serial mouse.</P>

<P>With this, our Pointer section is rather short:</P>

<!-- CODE SNIP //-->

<PRE>

  Section "Pointer"

     Protocol    "Microsoft"

     Device      "/dev/ttyS0"

  EndSection

</PRE>

<!-- END CODE SNIP //-->

<P>Be sure to put in the type of mouse you have and the device it is connected to, rather than merely copying our configuration.

</P>

<P>The protocol must be one of the options listed in Table 3.9.</P>

<TABLE WIDTH="100%"><CAPTION><B>Table 3.9</B> Pointer Protocols

<TR>

<TH WIDTH="100%" ALIGN="LEFT">Protocol

<TR>

<TH COLSPAN="1"><HR>

<TR>

<TD>BusMouse

<TR>

<TD>Logitech

<TR>

<TD>Microsoft

<TR>

<TD>MMSeries

<TR>

<TD>Mouseman

<TR>

<TD>MouseSystems

<TR>

<TD>PS/2

<TR>

<TD>MMHitTab

<TR>

<TD>Xqueue

<TR>

<TD>OSMouse

<TR>

<TD COLSPAN="1"><HR>

</TABLE>

<P>For Logitech mice, you&#146;ll most likely use BusMouse (if a bus mouse); for serial mice, you&#146;ll probably use the Microsoft or Mouseman protocols, rather than the more obvious Logitech protocol. If your mouse is connected to a PS/2 port, use the PS/2 protocol. (If you&#146;re using a newer system from a mass merchandiser like Dell, check the mouse port. Many newer systems feature PS/2 mouse ports, but they&#146;re not always called PS/2 ports; for example, Dell calls it a mouse port.)

</P>

<P>The Xqueue protocol is only used if you set that up for the keyboard, too. We don&#146;t advise using this. The OSMouse is only for SCO UNIX, not for Linux.</P>

<P>In our case, the mouse is connected to serial port number one, often called <I>com1</I> in the DOS lexicon. In true UNIX tradition, however, Linux starts counting serial ports with 0. To specify our mouse is connected to com1, we use a device name of <B>/dev/ttyS0</B>, the Linux device file for this port. We list commonly used ports in Table 3.10.</P>

<TABLE WIDTH="100%"><CAPTION><B>Table 3.10</B> Commonly Used Serial Ports in Linux

<TR>

<TH WIDTH="25%" ALIGN="LEFT">Port

<TH WIDTH="75%" ALIGN="LEFT">Device File Name in Linux

<TR>

<TH COLSPAN="2"><HR>

<TR>

<TD>com1

<TD>/dev/ttyS0

<TR>

<TD>com2

<TD>/dev/ttyS1

<TR>

<TD>com3

<TD>/dev/ttyS2

<TR>

<TD>com4

<TD>/dev/ttyS3

<TR>

<TD COLSPAN="2"><HR>

</TABLE>

<P>Your system may also have the <B>/dev/mouse</B> device file set up for the mouse port. No matter what device file you choose, the device must exist beforehand. (On our system, <B>/dev/mouse</B> is a link to <B>/dev/ttyS0</B>.)</P>

<P>The bus mouse device files are listed in Table 3.11.</P>

<TABLE WIDTH="100%"><CAPTION><B>Table 3.11</B> Bus mouse Device Names

<TR>

<TH WIDTH="30%" ALIGN="LEFT">Device

<TH WIDTH="70%" ALIGN="LEFT">Usage

<TR>

<TH COLSPAN="2"><HR>

<TR>

<TD>/dev/atibm

<TD>ATI bus mouse

<TR>

<TD>/dev/logibm

<TD>Logitech bus mouse

<TR>

<TD>/dev/inportbm

<TD>Microsoft bus mouse

<TR>

<TD>/dev/psaux

<TD>PS/2 or Quickport mice

<TR>

<TD COLSPAN="2"><HR>

</TABLE>

<P>Note that except for the <B>/dev/psaux</B> PS/2 mice, all the bus mice should use a protocol of <I>busmouse</I>.</P>

<P>There are a few more options for the Pointer section, but you&#146;re normally better off leaving them alone. (We know; we were curious and we managed to mess things up.)</P>

<P>We list the other Pointer options in Table 3.12.</P>

<TABLE WIDTH="100%"><CAPTION><B>Table 3.12</B> Other Pointer Section Options

<TR>

<TH WIDTH="30%" ALIGN="LEFT">Option

<TH WIDTH="70%" ALIGN="LEFT">Usage

<TR>

<TH COLSPAN="2"><HR>

<TR>

<TD>BaudRate rate

<TD>Specifies the baud rate for the serial mouse

<TR>

<TD VALIGN="TOP">Emulate3Buttons

<TD>Allows a two-button mouse to act like a three-button mouse; the third button is emulated by pressing both at once

<TR>

<TD>ChordMiddle

<TD>Fixes a problem with some Logitech Mouseman mice

<TR>

<TD>SampleRate rate

<TD>Fixes a problem with some Logitech mice

<TR>

<TD VALIGN="TOP">ClearDTR

<TD>May be required by dual-protocol mice in MouseSystems protocol mode

<TR>

<TD VALIGN="TOP">ClearRTS

<TD>May be required by dual-protocol mice in MouseSystems protocol mode

<TR>

<TD COLSPAN="2"><HR>

</TABLE>

<P>We generally don&#146;t set the baud rate. When we tried to, the mouse didn&#146;t work. If you do this, it is one time where the <B>Ctrl-Alt-Backspace</B> zapping sequence comes in handy.</P>

<P>For best results in X, you want to have a three-button mouse. Many X programs assume such a mouse.</P><P><BR></P>

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