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|image=[[File:Nokia N900 - Leste pre-alpha.jpg|250px]]
|image=[[File:Nokia N900 - Leste pre-alpha.jpg|250px]]
110.9mm x 59.8mm x 18mm|
TI OMAP 3430 @600MHz|
256 MB Mobile DDR|
800x480 3.5" Resistive TFT|
Micro USB 2.0 Slave|
Yes, UART under battery, 2.7V max!|
Yes, closed driver|
Yes (complex, no ucm, no speaker protection)|
Yes, no UI|
Yes, firmware required|
Yes, actually CIR, not IrDA|
|Ambient Light Sensor||
|Idle Power Consumption||
300mW (needs kernel work)|
The installation consists of two steps: copying the image to the microsd card, and setting up the bootloader on the phone.
dd the image to an sd card.
If using a Windows machine, you can use Etcher
See the next section on how to boot. (using either 0xFFFF/flasher-3.5 or u-boot/bootmenu: http://talk.maemo.org/showthread.php?t=81613)
Bootloader (U-Boot) setup
If you don't want to configure u-boot from Fremantle, or your Fremantle rootfs is broken), or you just want to install quickly:
1. Either download 0xFFFF (binary for x86) from https://maedevu.maemo.org/images/n900/tools/ or build from source from https://github.com/pali/0xFFFF/
2. Download u-boot from https://maedevu.maemo.org/images/n900/tools/
3. Turn off Nokia N900, issue the following command on PC and connect Nokia N900 to the PC:
sudo ./0xFFFF -m test/u-boot-2013.04-2.bin -l
4. Open the keyboard slider on the N900, and then issue following command on PC to test boot:
This should present u-boot from which you can select external SD card and boot to Maemo Leste. If you are presented with a menu, select the option to boot from External SD card. If you just get a command prompt, type
To flash u-boot permanently, you can issue the following command
(Be careful though. This will replace the existing fremantle kernel. Only do this if you do not care about the existing maemo installation or you know how to recover from this condition))
sudo ./0xFFFF -m test/u-boot-2013.04-2.bin -f
If you have a functional Fremantle installation, you can follow these steps instead:
1. Install "U-Boot with kernel 2.6.28-omap1"
2. Install "Linux kernel for power user (boot image for U-Boot)". This is optional, but recommended.
3. Add Maemo Leste menu item (run as root):
cat > /etc/bootmenu.d/30-maemo-leste.item << "EOF" &&
4. Reboot the device
Increase filesystem size
Run the following script:
- Speakers are enabled by default, but be careful of very high frequencies/levels - there are concerns regarding the possibility to blow them
Also see: https://elinux.org/N900
Power usage right now is reported to be about 80mA, which is quite a lot. On a good battery this will last for about 15 hours. Power management on the N900 is being worked on: https://github.com/maemo-leste/bugtracker/issues/170
echo default-on > /sys/class/leds/debug::sleep/trigger
To enable the OMAP sleep debug LEDs (on the keyboard). Open keyboard, turn off the screen with the slider, and the LEDs will turn off if the phone ever reaches sleep modes.
Currently it does not yet reliably reach any sleep modes.
This script can be used to decode idle states when this patch is applied: https://github.com/maemo-leste/n9xx-linux/blob/maemo/beowulf/debian/patches/0001_deeper_idle.patch
$ cat idlest.py
00001fff 48005020 (584be965) cm_idlest_per blocking bits: 0007e000
f7df3fb9 48004a20 (b32988a8) cm_idlest1_core blocking bits: 0020c046
0000000d 48004a28 (f7aa95e6) cm_idlest3_core
# 31 to 0
cm_idlest1_core_bits = [
cm_idlest1_core_bits = list(reversed(cm_idlest1_core_bits))
#inp = '0020c046'
inp = '00208042' # after rmmod hci_nokia and hci_uart
v = int(inp, 16)
print((32-len(b))*'0' + b)
for i in range(0, 32):
is_set = (v & (1 << i)) >> i
Nokia N900 has bq27200 integrated circuit for monitoring battery state. The datasheet can be found here: http://www.ti.com/lit/ds/symlink/bq27200.pdf. If you are curious, check the section called "Gas Gauge Operation" for how the battery calibration is done in a low level.
Here are described the steps necessary to calibrate your battery. This should help if you see "Battery not calibrated" message in the status applet.
- Fully charge Nokia N900. Don't detach the charger immediately, give it some time after you see "Fully charged" message (10 minutes should be enough).
- Detach the charger and don't attach it again until the battery is fully depleted. Remember: if you attach the charger (or USB cable) at least once, you will need to start the calibration from the beginning (fully charge the device again).
- You may use the device as you normally do. You may power it off, power it on, reboot. All as usual. Just don't connect the device to a charger or a PC using the USB cable.
- When your Nokia N900 has battery depleted, it will alarm you with the "battery low" sound.
- Wait for about 20 seconds and attach the charger. If the device was powered off because of battery depletion, it's fine. The battery should have done the calibration cycle. Just attach the charger to the device, give it a minute and press power button to start booting.
- If you still see "Battery not calibrated" message, reboot the device.
After the first calibration cycle you will see that it has ~1700 mAh for the fully charged battery. This value is wrong. It's how the battery calibration works in low level: it can't change the fully charged value of the battery in steps that exceed 12.5%. What this means for us: it's needed to repeat the calibration cycle several times to get more accurate value. It may take about 3-7 calibration cycles to get the proper mAh value for fully charged battery. If you spend some time on this process, you will get really accurate battery gauge and you will always know how much charge is remaining.
Tip 1. If for any reason you want to reset the battery calibration value to see the message “Battery is not calibrated” again, you should remove the battery from the device for about 6 hours.
Tip 2. If you replace the battery, you may want to do 1-2 calibration cycles described above to update the gauge for your new battery.
apt install mtd-utils
mkdir -vp /mnt/fremantle
ubiattach -p /dev/mtd5
mount -t ubifs ubi:rootfs /mnt/fremantle
Old status table
||Mainline + PowerVR Patches: https://github.com/maemo-leste/n9xx-linux
||Requires special hardware
||Firmware is non-free
||USB Network, Mass Storage. OTG not working, although it might be possible
||Works (minus speaker protection), but requires complex alsa configuration and currently no ucm support
||Works with ofono - UI is WIP, see https://github.com/maemo-leste/connui-cellular/
||Works with ofono. Needs Leste UI
||Works, no UI, poor quality for upstream audio, might require pulseaudio audio filters
||Driver needs some work
v4l-utils, then enable chip and set frequency using:
v4l2-ctl -d /dev/radio0 -c mute=0,tune_power_level=120 -f <freq>
||evdev interface not supported in mce
|Ambient Light Sensor
||Enable in alsamixer (Jack Function in alsamixer to TV OUT), enable with |
xrandr --output TV --mode 800x480 --same-as LCD. Set PAL/NTSC with
xrandr --output TV --set SignalProperties PAL, and scale with
xrandr --output TV --set TVScale 90.
||Works with gpsd but is not integrated yet, see GPS
||TX only (hardware limitation).
||Needs complex v4l work, no leste integration
|Idle power consumption
||Device does not enter RET or OFF mode