1. Usage
========

  hwinfo [debug=deb_flag] [log=log_file] [list[+]=hw_item] [[+|-]probe_option1] [[+|-]probe_option2] ...

Examples:

  hwinfo
    - probes for nearly everything

  hwinfo +all
    - probes for everything

  hwinfo log=hw_log
    - default probing, output is written to hw_log
      *** Please don't use "hwinfo >some_log 2>&1" to store the output into a
      log file! ***

  hwinfo -all +ide
    - probe for ide drives only

  hwinfo +all -isapnp -floppy
    - probe for everything *except* isapnp and floppies

Some probing flags do not stand for complete modules but enable additional
features; e.g. "pci.range" or "cdrom.info".

Example:
  hwinfo -all +cdrom
  gives a list of all cdrom's

  hwinfo -all +cdrom.info
  additionally reads the iso9660 info

To get a list of all supported probing flags, call 'hwinfo -all'.


2. Environment variables/kernel cmdline parameters
==================================================

You can control the hardware probing using the environment variable
"hwprobe" and the kernel cmdline parameters "hwprobe" & "x11".

If "hwprobe" is set on the kernel cmdline, the environment variable
"hwprobe" is ignored. Otherwise, the meaning of both is exactly the same.

  x11
    - Controls the X server/X version to prefer. It is either "3" or "4" or the
      name of the X server/X server module to use (XF3: server name without
      the leading "XF86_", XF4: the server module name).

      Examples:
        x11=3
          o prefer XFree86 3.x over 4.x (if possible)

        x11=SVGA
          o use the XF86_SVGA server (*** Even if the server does not
            support the card! ***)

        x11=nv
          o use the XF4 nv_drv.o driver (*** Even if the module does not
            support the card! ***)

  hwprobe
    - Controls which probing flags should *always* be set/cleared. (These
      settings *cannot* be overridden by command line switches.)

      Examples:
        hwprobe=-isapnp
          o *never* do any isapnp probing

        hwprobe=-braille,-modem
          o don't look for braille displays & modems

    - Allows you to add and remove hardware from the probing results. In this case
      the syntax is (-: remove, +: add at end of list, <nothing>: add at begin of
      list):
        hwprobe=[+-]<device_class>:<vendor_id>:<device_id>[:<unix_device_file>]

      <device_class>, <vendor_id> and <device_id> are device ids as used by libhd.
      See the output of hwinfo for examples. In connection with "-", you can use
      "*" as a placeholder that matches every id.

      Note: <unix_device_file> is optional.

      Note2: you cannot usefully *add* hardware that needs more info than that
      given by the hwprobe entry. Disks & floppies are notable examples.
      (But you can *remove* them.)

      Here is a typical hwinfo output for a mouse, with the relevant ids
      underlined (<device_class> is the combined base_class & sub_class),
      [see 1st example below]:

        14: PS/2 00.0: 10500 PS/2 Mouse
                       ^^^^^ -->	<device_class>
          [Created at mouse.110]
          Vendor: s0200 "Unknown"
                  ^^^^^  -->		<vendor_id>
          Model: 0002 "Generic PS/2 Mouse"
                 ^^^^  -->		<device_id>
          Device File: /dev/psaux
                       ^^^^^^^^^^ -->	<unix_device_file>
          Driver Info #0:
            XFree86 Protocol: ps/2
            GPM Protocol: ps2
          Attached to: #8 (PS/2 Controller)


      Examples:
        hwprobe=+10500:s200:2:/dev/psaux
          o add a ps/2 mouse [at the end of the hardware list]

        hwprobe=10500:s200:2:/dev/psaux
          o add a ps/2 mouse [at the start of the hardware list, so it
            is our default mouse]

        hwprobe=+10b00:s5001:0:/dev/ttyS0
          o add a braille display connected to /dev/ttyS0

        hwprobe=-10500:s200:2:/dev/psaux
          o remove ps/2 mice attached to /dev/psaux

        hwprobe=-10500:s200:2
          o remove all ps/2 mice

        hwprobe=-10500:*:*
          o remove all ps/2 mice

        hwprobe=-*:*:*:/dev/hdc
          o remove /dev/hdc

        hwprobe=+401:1274:5000
          o add an ensoniq sound card

      Grafics cards are are slightly trickier:

        hwprobe=+300:1014:b7
          o add a Fire GL1 card
            Note: this way you'll get a multihead config. You'll probably
            rather want the following example.

        hwprobe=-300:*:*,+300:1014:b7
          o remove all graphics cards; then add a Fire GL1 card

        hwprobe=+400:121a:1
          o add a 3fx voodoo card (Note the class "400", not "300"!)

    - for more ids, see "src/ids/names.*" and "src/ids/drivers.*"