Kernel boot command-line parameters

This page documents some of the kernel boot command-line parameters that are useful for XDAndroid users.

acpuclock.force_turbo

arch/arm/mach-msm/acpuclock.c

?

acpuclock.oc_freq_khz

arch/arm/mach-msm/acpuclock.c

change this for overclocking (should be a multiple of 19200)

768000: 768 MHz

614400: 614.4 MHz

board-htcraphael-navi.wake

arch/arm/mach-msm/board-htcraphael-navi.c

Controls which buttons wake the device from sleep.

0: ?

board-htcrhodium-proximity.on

arch/arm/mach-msm/board-htcrhodium-proximity.c

1: enable proximity sensor

board-htcrhodium-proximity.wake

arch/arm/mach-msm/board-htcrhodium-proximity.c

1: enable wake on proximity sensor

board-htcvogue.panel_type

arch/arm/mach-msm/board-htcvogue.c

Panel type used to power the panel off and on.

0: don't power off the panel (default)

1: Hitachi

2: Topoly

3: Samsung

clock-7x00.a11

arch/arm/mach-msm/clock-7x00.c

ARM11 clock speed in MHz.

clock-7x00.ahb_div

arch/arm/mach-msm/clock-7x00.c

Advanced Host Bus (AHB) divider.

clock-7x00.mddi

arch/arm/mach-msm/clock-7x00.c

Mobile Display Digital Interface (MDDI) clock address/offset/? (e.g. 0xa51 or 0xe2c)

external.rhod_speaker

arch/arm/mach-msm/qdsp5/external.c

1: enable external speaker

gsensor_axis

Maps the hardware accelerometer axes to software.

htcblackstone-panel.no_bkl_off

arch/arm/mach-msm/board-htcblackstone-panel.c

1: don't turn off the backlight

htc_battery_smem.fake

arch/arm/mach-msm/htc_battery_smem.c

1: turn off low-battery warning

htc_hw.call_vol

arch/arm/mach-msm/htc_hw.c

in-call speaker volume level (non-speakerphone speaker)

0: lowest volume

...

5: highest volume

force_cdma

arch/arm/mach-msm/htc_hw.c

1: tells the phone to use CDMA. This is useful for the Touch Pro2, which can contain both GSM and CDMA hardware.

htc_hw.handsfree

arch/arm/mach-msm/htc_hw.c

1: enable

2: disable

hw3d.force

arch/arm/mach-msm/hw3d.c

1: enable hardware 3D

lcd.density

?

mddi.width

MDDI - ?

mddi.height

MDDI - ?

msm_blackstone_pad.vibrate

1 - ?

msmsdcc_1bit

drivers/mmc/host/msm_sdcc.c

Eschews 4-bit-data mode for 1-bit-data mode in the MSM SD Card Controller.

msmsdcc_fmax

drivers/mmc/host/msm_sdcc.c

The maximum frequency (in Hz) used by the MSM SD Card Controller.

msmsdcc_nopwrsave

drivers/mmc/host/msm_sdcc.c

Disables power saving in the MSM SD Card Controller.

msmts_calib

?

msmvkeyb_toggle

off: MSM virtual keyboard - ?

on: displays terminal onscreen keyboard

north_am_dialing

htcgeneric-ril/htcgeneric-ril.c

1: tells the RIL to strip "+" characters from phone numbers before dialing them. This is useful with some North American carriers (e.g. Sprint) that do not handle phone numbers containing "+". See also http://wiki.cdg.org/wiki/Plus_Code_Dialing.

physkeyboard

See also keyboard.

fuze

raph

german_raph

nordic_raph

swiss_raph

rhod100_de

rhod100_es

rhod100_fr

rhod100_it

rhod100_nordic

rhod100_uk

rhod210 (T-Mobile Keyboard)

rhod300

rhod400 (Sprint keyboard)

rhod500 (Verizon keyboard)

tilt2

pm.debug_mask

arch/arm/mach-msm/pm.c

power management - debug options

2: vibrates phone lightly after it exits deep sleep

pm.sleep_mode

arch/arm/mach-msm/pm.c

power management: set the mode used when the phone is "off"

0: Power Collapse Suspend - totally power off the ARM11 (registers must be restored)

1: Power Collapse - totally power off the ARM11 (registers must be restored)

2: Apps Sleep - ARM11 is still on, but put into low-power mode (registers are still saved)

3: the ARM11's clock is lowered to 20 MHz instead of 300–500, and voltage is lowered too; wait for interrupt

4: Wait for Interrupt - no change in ARM11's clock or voltage

pmem.extra

1: ?

ppp.apn

PPP Access Point Name, e.g. "internet"

ppp.nostart

1: disable starting the PPP connection on boot

ppp.password

The password used to connect to the network when dialing #777.

ppp.username

The username used to connect to the network when dialing #777.

rel_path

The path where the kernel should look for other XDAndroid files. E.g. rel_path=andboot

sensor

topaz: ?

snd.force_headset

arch/arm/mach-msm/qdsp5/snd.c

add headset half autodetection, when you plug in/out the headset, to apply the output update, make a call (or find any other way to call snd_set_device's ioctl)

1: extUSB audio I/O

2: 3.5-mm jack

External links

• http://www.androidonhtc.com/wiki/Boot_Options - similar information
• http://sites.google.com/site/androidport/faq - look for "What are the different cmdline switches I can pass in the Startup.txt?"