ubuntu-phone team mailing list archive

[Michael Zanetti <michael.zanetti@xxxxxxxxxxxxx>]

I've ran into this yesterday after leaving the Nexus 4 untouched on my desk 
for a whole week.

I think it's worth mentioning that you need to use the original wall charger 
and cable to revive it again. (Of course some others might work too, but 
chances are high that they don't)

At first I tried with a the wall charger that came with the Blackberry Z10 and 
a USB cable from a Amazon Kindle. Even after multiple hours of "charging" and 
holding the Power button for minutes, nothing happened. At some point I 
switched over to the original charging equipment that came with the Nexus 4 
and after like 20 minutes of charging, holding the power button for some 
seconds (> 10) it suddenly woke up again.

Br,
Michael

On Wednesday 07 August 2013 11:56:00 Pat McGowan wrote:
> A number of folks have experienced getting their Nexus 4s into a state
> where they will not turn on and they will not charge. The device seems
> to have a deep sleep or hibernation mode that it enters on very low
> battery conditions. The following steps are known to work and come from
> the google forums.
> 
> Note that an issue in the qualcomm sensor driver was recently worked
> around to release a wakelock that was preventing the Nexus 4s from
> suspending normally and therefore depleting the battery. This fix is
> currently available in the pending release.
> 
> "To bring the Nexus 4 out of hibernation:
> 1. Plug Nexus 4 to a wall charger.
> 2. Press and hold the Power button for 60 seconds
> The device should now turn on."
> 
> Note that the red light will come on to indicate charging with low
> battery level. After a minute or so the battery icon will appear then
> screen will blank to indicate normal charge.
> 
> Reports are that 10 secs is sufficient to force the phone from deep
> sleep to off.
> We have also seen recovery after allowing the battery to completely run
> out also causing the phone to be fully off. Then plug it in, red light,
> and happiness.
> 
> The following technique was also recommended but generally did not work
> for us in the hibernation state.
> 
> "If customer has let Nexus 4 battery run all the way down and it will no
> longer charge, have customer try the following:
> 1. Plug Nexus 47 to a wall charger.
> 2. Immediately press Volume Down and Power at the same time to reach the
> bootloader
> 3. From bootloader menu, press Volume Down until you see "Power Off Device."
> 4. Press the Power button to select the 'Power off device' option
> 5. Once your device is off, unplug the charger and then plug it back
> into the device.
> The device should now begin charging correctly."