Translations by Zenat Rahnuma

("Ubuntu" may be replaced with other related operating system names. This help text is generic.)

To use one of these boot methods, select it from the menu with the cursor keys. Press F4 to select alternative start-up and installation modes. Press F6 to edit boot parameters. Press F6 again to select from a menu of commonly-used boot parameters.

Except in expert mode, non-critical kernel boot messages are suppressed.

Use one of these boot methods to rescue an existing install

There is no dedicated rescue mode on this disc. However, since the disc provides a complete user environment, it is possible to use the command-line and/or graphical tools provided to rescue a broken system, and to use a web browser to search for help. Extensive advice is available online for most kinds of problems that might cause your normal system to fail to boot correctly.

SPECIAL BOOT PARAMETERS - OVERVIEW

On a few systems, you may need to specify a parameter at the <literal>boot:</literal> prompt in order to boot the system.

For example, Linux may not be able to autodetect your hardware, and you may need to explicitly specify its location or type for it to be recognized.

boot parameters understood by the install system

boot parameters understood by the bootstrap system

Many kernel modules are loaded dynamically by the installer, and parameters for those modules cannot be given on the command line. To be prompted for parameters when modules are loaded, boot in expert mode (see <link linkend="F3"><keycap>F3</keycap></link>).

Many kernel modules are loaded dynamically by the bootstrap system, and parameters for those modules cannot be given on the command line.

You can use the following boot parameters at the <literal>boot:</literal> prompt, in combination with the boot method (see <link linkend="F3"><keycap>F3</keycap></link>).

You can use the following boot parameters by pressing F6, in combination with the boot method (see <link linkend="F3"><keycap>F3</keycap></link>).

If you use hex numbers you have to use the 0x prefix (e.g., 0x300).

<userinput>hd=<replaceable>cylinders</replaceable>,<replaceable>heads</replaceable>,<replaceable>sectors</replaceable></userinput>

Some IBM ThinkPads

<userinput>floppy.floppy=thinkpad</userinput>

Protect I/O port regions

<userinput>reserve=<replaceable>iobase</replaceable>,<replaceable>extent</replaceable></userinput><optional><userinput>,<replaceable>...</replaceable></userinput></optional>

Laptops with screen display problems

Use first serial port at 9600 baud

Force use of generic IDE driver

Possible (temporary) workarounds for lockups or other hardware failures:

disable buggy APIC interrupt routing

<userinput>noapic nolapic</userinput>

(partly) disable ACPI

<userinput>acpi=noirq</userinput> or <userinput>acpi=off</userinput>

disable USB

poll for interrupts

<userinput>irqpoll</userinput>

For example:

boot: install vga=771 noapic nolapic

boot: live vga=771 noapic nolapic

<keycap>F7</keycap>

SPECIAL BOOT PARAMETERS - VARIOUS DISK DRIVES

Adaptec 151x, 152x

<userinput>aha152x.aha152x=<replaceable>iobase</replaceable></userinput><optional><userinput>,<replaceable>irq</replaceable></userinput><optional><userinput>,<replaceable>scsi-id</replaceable></userinput><optional><userinput>,<replaceable>reconnect</replaceable></userinput></optional></optional></optional>

Adaptec 1542

<userinput>aha1542.aha1542=<replaceable>iobase</replaceable></userinput><optional><userinput>,<replaceable>buson</replaceable>,<replaceable>busoff</replaceable></userinput><optional><userinput>,<replaceable>dmaspeed</replaceable></userinput></optional></optional>

Adaptec 274x, 284x

<userinput>aic7xxx.aic7xxx=no_reset</userinput> (enabled if non-zero)

BusLogic SCSI Hosts

<userinput>BusLogic.BusLogic=<replaceable>iobase</replaceable></userinput>

Certain DELL machines

<userinput>aic7xxx.aic7xxx=no_probe</userinput>

This list is incomplete, see the kernel's kernel-parameters.txt file for more.

boot: install aic7xxx.aic7xxx=no_probe

boot: live aic7xxx.aic7xxx=no_probe

<keycap>F8</keycap>