R&D mode
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
.
[edit] 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.
[edit] R&D mode flags
You can enable some R&D mode flags (flasher-3.5 --set-rd-flags=<flag>
) for various features:
no-omap-wd
- Disables the watchdog on the OMAP processor.no-retu-wd
- Disables the watchdog on retu.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-usb-timeout
- Unknownsti-console
- Unknownno-charging
- Disables charging via the USB port. bme will still be running in the background.force-power-key
- Omap bootreason will be always pwr_key. Maemo system will not see any reboots or watchdog resets. Instead Maemo will think that device was started by power key.
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
It seems enabling of R&D mode is causing device (N900) to power up on battery insert and USB-connect.
- This page was last modified on 12 November 2014, at 08:38.
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