.. include:: ../../../format.rst
.. include:: ../../../urls.rst

.. _l5_chestnut_known_issues:

Known issues
============

This page lists known issues for the **Chestnut** shipment of phones as supplied to users.


Data
----


Wi-Fi does not always turn on upon bootup
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

**Problem**:
Wi-Fi does not always start up correctly on boot even if it is enabled with the hardware switch.


**Solution**:
Disabling and re-enabling Wi0Fi with the hardware killswitch should activate it.


Unable to receive a fixed GNSS location
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

**Problem**:
The GNSS module is unable to reliably receive broadcasts from satellites, making it difficult to fix the location of the phone.

**Description**:
This problem will be addressed in later revisions of the hardware, from Dogwood onwards.


Power
-----


Rapid charging failure
~~~~~~~~~~~~~~~~~~~~~~

**Problem**:
When charging the phone using a charger, 12V negotiation and rapid charging can fail.

**Description**:
This failure mode does not affect 5V charging over a USB type-C to USB type-A cable.

**Solution**:
To help prevent this, follow these step to charge the phone:

#. Unplug the power adapter (wall wart) from the power outlet.
#. Plug one end of the USB-cable into the adapter and the other end into the phone.
#. Plug the adapter into the power outlet.

When unplugging:

#. Unplug the adapter from the power outlet first.
#. Unplug the USB-C cable from the phone.


Incorrectly labeled battery capacity
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

**Problem**:
The battery installed in the phone is labelled with a capacity of 2000 mAh.

**Description**:
This is a conservative estimate of the capacity.
Later iterations of the phone should have higher capacity batteries.


Power/heat issues
~~~~~~~~~~~~~~~~~

**Problem**:
Power management and heat issues are caused by various subsystems.

**Description**:
The processor will be run more slowly to prevent overheating, affecting processing performance.


Device reboots if SIM inserted/removed while powered on
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

**Problem**:
The phone may restart if you remove or insert the SIM card while it is powered.

**Description**:
This is due to the type of SIM tray in use.
**Users should power off the phone before replacing SIM cards.**


Rapid charging only works on certain chargers
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

**Problem**
Rapid charging currently only works when using the charger supplied with the phone or a compatible USB C PD (power delivery) charger.


Rapid charging not working with certain USB cables
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

**Problem**:
Rapid charging is currently not possible over a USB A to C cable.

**Description**:
This is due to a software issue.
(See `BQ25895: Disable BC1.2 and Set IINLIM to Max Value <linux-next-135_>`_).