Boot codes

If the possible values are listed in the "Values" field of the table, they must be appended to the "cheatcode" with an = sign. For example, if 1280x1024 was the desired value for the screen cheatcode, then you would type screen=1280x1024 into the grub boot prompt, or for language, lang=pt.

Reference to an exhaustive list for kernel boot codes

aptosid specific boot codes (Live.iso only)

Boot code	Value	Description
blacklist	modulename	to temporarily disable modules before udev
desktop	kde	Choose your desktop
	fluxbox	Choose your desktop
fromiso		Please refer to booting "fromiso"
hostname	myhostname	Hostname, changes hostname of live-CD system
lang	be, bg, cz, da, de, de_CH, el, en, en_AU, en_GB, en_IE, es, fr, fr_BE, ga, hr, hu, it, ja, nl, nl_BE, pl, pt (pt_BR), pt_PT, ro, ru, zh	Sets your language. It will also set locale, keyboard layout (console and X), timezone and a debian mirror. When the extended form lang=ll_cc or lang=ll-cc is given, ll will be used for language selection and cc for keyboard, mirror and timezone selection (e.g. lang=fr-be). The defaults for English are en_US with UTC as the timezone and for German, de with Europe/Berlin as the timezone. Example: lang=pt_PT tz=Pacific/Auckland
md5sum		Test integrity of medium
noaptlang		Disable installation of localisation packages based on the selected language
nocpufreq		Do not activate Speedstep/Powernow
nodhcp		Disable automatic use of Dynamic Host Configuration Protocol (attempts to automatically setup your ethernet connections).
noeject		Do not prompt to eject the CD on shutdown
nofstab		Do not write a new fstab
nointro		Skips the display of index.html on live desktop startup
nonetwork		Disables the automatic configuration of network devices at boot time
noswap		Do not enable the swap partition
persist		Please refer to "fromiso" and persist
smouse		Probe for serial mice with hwinfo
toram		Copy CD to RAM and start from there
tz	Europe/Dublin	Sets your timezone. If your bios/hardware clock is set to UTC, use utc=yes. A list of all timezones supported can be found by copying and pasting into your browser: file:///usr/share/zoneinfo/ .

X related bootcodes

Either the xrandr or xmodule cheatcode should also be used if using other X related cheatcodes with a radeon, intel or mga graphics card.

Boot code	Value	Description
dpi	(e.g.) auto or XXX	Set desired Dots Per Inch for your display. You can work out your screen's dpi from the width in pixels divided by the diagonal size in inches and multiplying this by 1.25 for a 4:3 screen, 1.18 for a 16:10 screen or 1.147 for a 16:9 screen. For a 24" 1920x1080 screen it would be 1.147*1920/24 giving dpi=92 or a 15" 1600x1200 screen would be 1.25*1600/15 giving dpi=133.
hsync	(e.g.) 80	Horizontal monitor refresh rate (kHz)
noml		Prevents X.org configuration from containing a list of Modelines and causes audodetection of the correct Mode
noxrandr		Disable use of RandR 1.2 extensions by new X.org drivers and use legacy monitor probing techniques
screen	(e.g.) 800x600	Sets your screen resolution, 1024x768, 1600x1200 etc
vsync	(e.g.) 60	Vertical monitor refresh rate (Hz)
xdepth	values: 8, 15, 16, 24	Default color depth to be used by X.org (not all drivers support 1 and 4)
keytable	(e.g.) us, de, gb	Keyboard Layout to be used by X.org
xkbmodel	(e.g.) pc105	Keyboard model to be used by X.org
xkboptions	(e.g.) grp:alt_shift_toggle	Keyboard variant to be used by X.org
xkbvariant	(e.g.) nodeadkeys,	to set a keyboard variant
xmode	(e.g.) 800x600	Sets your screen resolution, 1024x768, 1600x1200 etc
xmodule or xdriver	(e.g.) ati, fbdev, i810, intel, mga, nv, radeon, savage, vesa	use given X-module
xrandr		Force X.org to be configured to use RandR 1.2 extensions of new X.org drivers
xrate	XX	Force preferred refresh rate of RandR 1.2 supported X.org drivers, must be used in conjunction with xmode cheatcode Comprehensive documentation is here
xhrefresh	(e.g.) 80	Horizontal monitor refresh rate in X (kHz)
xvrefresh	(e.g.) 60	Vertical monitor refresh rate in X (Hz)

Common Linux kernel parameter boot codes

Boot code	Value	Description
apm	off	Power-off
1, 2, 3, 4, 5	(e.g.) 3	init runlevel numbers that can be manually placed on the Grub boot line See aptosid runlevels - init
console	For example: console=ttyS0,9600n8	If you enable a serial console with console=ttyS*,* the /etc/inittab file will be automatically updated to allow you to login on this serial port.
irqpoll		Use IRQ poll
mem	(e.g.) 128M, 1G	Ram size to be used
noapic		Disable apic (Advanced Programmable Interrupt Controller)
nodma		Disable the use of Direct Memory Access for your drives
noisapnpbios		Disable ISA Plug'n Play
nomce		Disable Machine Check Exception
nosmp		Disable Symetric Multi Processor support
pci	noacpi	Do not use ACPI to route PCI interrupts
quiet		Don't list everything to console
vga	normal	Look here for vga codes: VGA boot codes
video	(e.g.) DVI-0:800x600                    or 800x600	For KMS enabled cards. Applies to intel and ati cards (the radeon driver), where DVI-X/LVDS-X is the video output as shown by xrandr.