Nokia N900: annoying yellow LED while battery is charging (and some progress with free userspace)

Nokia N900: annoying yellow LED while battery is charging (and some progress with free userspace)

[Pavel Machek]

Hi!

While battery is charging, 3 color LED produces yellow light.. at
quite high intensity, which makes screen unpleasant to look at (with
4.4 kernel).

I'm pretty sure original Maemo did not try to blind me.

It looks like CHRG_IND signal goes from charger to LEDs, and BOOT_MODE
pin may be involved.

Any idea how to get rid of the light?

(And yes, I have some progress; tui project on gitlab now contains
enough to do voice calls with Debian+Ofono+pulseaudio+cmtspeech
utility. Audio latency is bit high, but it is already somehow usable.)

Thanks,
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

Nokia N900: annoying yellow LED while battery is charging (and some progress with free userspace)

[Pavel Machek]

Hi!

While battery is charging, 3 color LED produces yellow light.. at
quite high intensity, which makes screen unpleasant to look at (with
4.4 kernel).

I'm pretty sure original Maemo did not try to blind me.

It looks like CHRG_IND signal goes from charger to LEDs, and BOOT_MODE
pin may be involved.

Any idea how to get rid of the light?

(And yes, I have some progress; tui project on gitlab now contains
enough to do voice calls with Debian+Ofono+pulseaudio+cmtspeech
utility. Audio latency is bit high, but it is already somehow usable.)

Thanks,
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

Re: Nokia N900: annoying yellow LED while battery is charging (and some progress with free userspace)

[Pali Rohár]

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On Sunday 17 January 2016 00:22:22 Pavel Machek wrote:
> Hi!
> 
> While battery is charging, 3 color LED produces yellow light.. at
> quite high intensity, which makes screen unpleasant to look at (with
> 4.4 kernel).
> 
> I'm pretty sure original Maemo did not try to blind me.
> 
> It looks like CHRG_IND signal goes from charger to LEDs, and
> BOOT_MODE pin may be involved.
> 
> Any idea how to get rid of the light?

echo 0 > /sys/class/power_supply/bq24150a-0/stat_pin_enable

-- 
Pali Rohár
pali.rohar@gmail.com

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Nokia N900: annoying yellow LED while battery is charging (and some progress with free userspace)

[Pali Rohár]

On Sunday 17 January 2016 00:22:22 Pavel Machek wrote:
> Hi!
> 
> While battery is charging, 3 color LED produces yellow light.. at
> quite high intensity, which makes screen unpleasant to look at (with
> 4.4 kernel).
> 
> I'm pretty sure original Maemo did not try to blind me.
> 
> It looks like CHRG_IND signal goes from charger to LEDs, and
> BOOT_MODE pin may be involved.
> 
> Any idea how to get rid of the light?

echo 0 > /sys/class/power_supply/bq24150a-0/stat_pin_enable

-- 
Pali Roh?r
pali.rohar at gmail.com
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