R&D mode

(→R&D mode flags)
(→R&D mode flags)
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<code>flasher-3.5 --set-rd-flags</code>
<code>flasher-3.5 --set-rd-flags</code>
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<pre>
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maemo_flasher-3.5_2.4.5.3_beta/flasher-3.5 --set-rd-flag
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flasher v2.4.5 (Jun 25 2009)
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 +
Possible R&D flags:
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  no-omap-wd
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  no-ext-wd
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  no-lifeguard-reset
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  serial-console
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  no-usb-timeout
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  sti-console
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  no-charging
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  force-power-key
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</pre>
[[Category:Power users]]
[[Category:Power users]]

Revision as of 04:10, 11 June 2011

You can enable R&D mode by passing the --enable-rd-mode flag to the flasher.

Note: This flag does not need to be passed to the EMMC image if you are flashing that as well.

You must use a Linux or a Mac OS X computer to enable R&D Mode, as the Windows update wizard will not allow you to enable/disable R&D Mode. Although, the Windows flasher will disable R&D Mode if you use it to reflash a device that has R&D Mode already enabled.

To switch back to production mode, use --disable-rd-mode.

What R&D mode does

  • sudo gainroot in the console can be used, without installing anything extra, to gain a root shell.
  • The power button turns on the tablet with a shortpress press as opposed to the longpress normally required.
  • N900: The keyboard backlight behind the left and right side of the keyboard flickers in response to system activity.

R&D mode flags

You can enable some R&D mode flags (flasher-3.5 --set-rd-flags=<flag>) for various features (this is N8x0 below):

  • no-lifeguard-reset - Disables the lifeguard process (lifeguard reboots the device when an important system process crashes).
  • serial-console - Enables the serial console (the serial port pins are next to the battery) and causes a shorter battery life.
  • no-omap-wd - Disables the watchdog on the OMAP processor.
  • no-retu-wd - Disables the watchdog on retu.
  • no-usb-timeout - Unknown
  • no-charging - Disables charging via the USB port. bme will still be running in the background.

running the command without parameters gives a list of available modes: flasher-3.5 --set-rd-flags 

maemo_flasher-3.5_2.4.5.3_beta/flasher-3.5 --set-rd-flag
flasher v2.4.5 (Jun 25 2009)

Possible R&D flags:
  no-omap-wd
  no-ext-wd
  no-lifeguard-reset
  serial-console
  no-usb-timeout
  sti-console
  no-charging
  force-power-key
Retrieved from "https://wiki.maemo.org/R%26D_mode"