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Contents of /xml/htdocs/doc/en/handbook/hb-install-kernelparams.xml

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Bug #372427 - Remove EVMS from documentation as it is not supported anymore

1 <?xml version='1.0' encoding="UTF-8"?>
2 <!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/handbook/hb-install-kernelparams.xml,v 1.3 2011/02/21 08:38:40 nightmorph Exp $ -->
3 <!DOCTYPE included SYSTEM "/dtd/guide.dtd">
4
5 <included>
6
7 <version>2</version>
8 <date>2008-05-02</date>
9
10 <body>
11 <p>
12 <brite>Hardware options:</brite>
13 </p>
14
15 <dl>
16 <dt>acpi=on</dt>
17 <dd>
18 This loads support for ACPI and also causes the acpid daemon to be started by
19 the CD on boot. This is only needed if your system requires ACPI to function
20 properly. This is not required for Hyperthreading support.
21 </dd>
22 <dt>acpi=off</dt>
23 <dd>
24 Completely disables ACPI. This is useful on some older systems and is also a
25 requirement for using APM. This will disable any Hyperthreading support of
26 your processor.
27 </dd>
28 <dt>console=X</dt>
29 <dd>
30 This sets up serial console access for the CD. The first option is the
31 device, usually ttyS0 on x86, followed by any connection options, which are
32 comma separated. The default options are 9600,8,n,1.
33 </dd>
34 <dt>dmraid=X</dt>
35 <dd>
36 This allows for passing options to the device-mapper RAID subsystem. Options
37 should be encapsulated in quotes.
38 </dd>
39 <dt>doapm</dt>
40 <dd>
41 This loads APM driver support. This requires you to also use acpi=off.
42 </dd>
43 <dt>dopcmcia</dt>
44 <dd>
45 This loads support for PCMCIA and Cardbus hardware and also causes the pcmcia
46 cardmgr to be started by the CD on boot. This is only required when booting
47 from PCMCIA/Cardbus devices.
48 </dd>
49 <dt>doscsi</dt>
50 <dd>
51 This loads support for most SCSI controllers. This is also a requirement for
52 booting most USB devices, as they use the SCSI subsystem of the kernel.
53 </dd>
54 <dt>sda=stroke</dt>
55 <dd>
56 This allows you to partition the whole hard disk even when your BIOS is unable
57 to handle large disks. This option is only used on machines with an older BIOS.
58 Replace sda with the device that requires this option.
59 </dd>
60 <dt>ide=nodma</dt>
61 <dd>
62 This forces the disabling of DMA in the kernel and is required by some IDE
63 chipsets and also by some CDROM drives. If your system is having trouble
64 reading from your IDE CDROM, try this option. This also disables the default
65 hdparm settings from being executed.
66 </dd>
67 <dt>noapic</dt>
68 <dd>
69 This disables the Advanced Programmable Interrupt Controller that is present
70 on newer motherboards. It has been known to cause some problems on older
71 hardware.
72 </dd>
73 <dt>nodetect</dt>
74 <dd>
75 This disables all of the autodetection done by the CD, including device
76 autodetection and DHCP probing. This is useful for doing debugging of a
77 failing CD or driver.
78 </dd>
79 <dt>nodhcp</dt>
80 <dd>
81 This disables DHCP probing on detected network cards. This is useful on
82 networks with only static addresses.
83 </dd>
84 <dt>nodmraid</dt>
85 <dd>
86 Disables support for device-mapper RAID, such as that used for on-board
87 IDE/SATA RAID controllers.
88 </dd>
89 <dt>nofirewire</dt>
90 <dd>
91 This disables the loading of Firewire modules. This should only be necessary
92 if your Firewire hardware is causing a problem with booting the CD.
93 </dd>
94 <dt>nogpm</dt>
95 <dd>
96 This disables gpm console mouse support.
97 </dd>
98 <dt>nohotplug</dt>
99 <dd>
100 This disables the loading of the hotplug and coldplug init scripts at boot.
101 This is useful for doing debugging of a failing CD or driver.
102 </dd>
103 <dt>nokeymap</dt>
104 <dd>
105 This disables the keymap selection used to select non-US keyboard layouts.
106 </dd>
107 <dt>nolapic</dt>
108 <dd>
109 This disables the local APIC on Uniprocessor kernels.
110 </dd>
111 <dt>nosata</dt>
112 <dd>
113 This disables the loading of Serial ATA modules. This is used if your system
114 is having problems with the SATA subsystem.
115 </dd>
116 <dt>nosmp</dt>
117 <dd>
118 This disables SMP, or Symmetric Multiprocessing, on SMP-enabled kernels. This
119 is useful for debugging SMP-related issues with certain drivers and
120 motherboards.
121 </dd>
122 <dt>nosound</dt>
123 <dd>
124 This disables sound support and volume setting. This is useful for systems
125 where sound support causes problems.
126 </dd>
127 <dt>nousb</dt>
128 <dd>
129 This disables the autoloading of USB modules. This is useful for debugging
130 USB issues.
131 </dd>
132 <dt>slowusb</dt>
133 <dd>
134 This adds some extra pauses into the boot process for slow USB CDROMs, like
135 in the IBM BladeCenter.
136 </dd>
137 </dl>
138
139 <p>
140 <brite>Volume/Device Management:</brite>
141 </p>
142
143 <dl>
144 <dt>dolvm</dt>
145 <dd>
146 This enables support for Linux's Logical Volume Management.
147 </dd>
148 </dl>
149
150 <p>
151 <brite>Other options:</brite>
152 </p>
153
154 <dl>
155 <dt>debug</dt>
156 <dd>
157 Enables debugging code. This might get messy, as it displays a lot of data to
158 the screen.
159 </dd>
160 <dt>docache</dt>
161 <dd>
162 This caches the entire runtime portion of the CD into RAM, which allows you
163 to umount /mnt/cdrom and mount another CDROM. This option requires that you
164 have
165 at least twice as much available RAM as the size of the CD.
166 </dd>
167 <dt>doload=X</dt>
168 <dd>
169 This causes the initial ramdisk to load any module listed, as well as
170 dependencies. Replace X with the module name.
171 <br/>
172 Multiple modules can be specified by a comma-separated list.
173 </dd>
174 <dt>dosshd</dt>
175 <dd>
176 Starts sshd on boot, which is useful for unattended installs.
177 </dd>
178 <dt>passwd=foo</dt>
179 <dd>
180 Sets whatever follows the equals as the root password, which is required for
181 dosshd since we scramble the root password.
182 </dd>
183 <dt>noload=X</dt>
184 <dd>
185 This causes the initial ramdisk to skip the loading of a specific module that
186 may be causing a problem. Syntax matches that of doload.
187 </dd>
188 <dt>nonfs</dt>
189 <dd>
190 Disables the starting of portmap/nfsmount on boot.
191 </dd>
192 <dt>nox</dt>
193 <dd>
194 This causes an X-enabled LiveCD to not automatically start X, but rather, to
195 drop to the command line instead.
196 </dd>
197 <dt>scandelay</dt>
198 <dd>
199 This causes the CD to pause for 10 seconds during certain portions the boot
200 process to allow for devices that are slow to initialize to be ready for use.
201 </dd>
202 <dt>scandelay=X</dt>
203 <dd>
204 This allows you to specify a given delay, in seconds, to be added to certain
205 portions of the boot process to allow for devices that are slow to initialize
206 to be ready for use. Replace X with the number of seconds to pause.
207 </dd>
208 </dl>
209
210 </body>
211
212 </included>

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