Hi Everyone.
I'm just installing a bugfix for Kitkat but I observed (repeatable) problem with .687 firmware when used with Toyota Touch & Go (for example recent Toyota Yaris, Auris, Verso).
The problem:
When you pair a Z1 running Android 4.4.2 with T&G using Bluetooth it will connect just fine. You may not notice anything. But when you enter power management you will see that the phone is "Active" all the time.
If you run any app like CPU Spy and see CPU states you will notice that the phone stuck in 300 MHz mode.
Additionaly after connecting to T&G my Z1 refuses to connect with any other car without restarting the phone (but it can connect to the T&G that caused a problem).
Of course due to lack of Deep Sleep battery is drained much faster than it should and the phone runs hot.
Preparation steps:
1. You need Toyota car with Toyota Touch or Toyota Touch & Go (navigation) system
2. Enable bluetooth in Z1 running Kitkat .687 firmware
3. Pair phone with T&G
4. Z1 will connect just fine. All functions like calling, address book, messages, bluetooth audio, internet access will be working fine
Steps to repeat the problem:
1. Enter the car & start it
2. Wait for the phone to connect
3. Wait minute or two (just like minimal normal trip)
4. Turn off the car (it will disconnect from the phone)
Now leave the phone unused for a while then check "Activity" in power settings. You will notice that all the time the phone is active and any CPU state scanner will show it stuck in 300 MHz speed state.
Temporary (annoying if you need to do everytime you leave the car) remedium:
1. Turn off bluetooth using quick settings menu
2. Turn on bluetooth
Sometimes it is not enough and you need to restart the phone, turn bluetooth off again and turn on.
I also observed that restarting phone withour prior turning bluetooth off does not help and CPU is still stuck in 300 MHz or higher speeds.
Moreover when I leave T&G car and enter another car (which my phone is already paired and not causing any problems) it refues to connect. I need to go through bluetooth on/off, phone restart path. Other accesories (smartwatch 2) connect just fine.
It wasn't a problem on Jelly Bean 4.3 firmware, also my wife's Z1 Compact running 4.3 doesn't have any problems with this scenario. It began with update to 4.4.2 firmware.
Until it's resolved I'm not updating her Z1C to Kitkat. Now I'm installing .757 firmware. I will check if this bug is still present in updated version.
And not to going off topic but if I could I would roll-back my Z1 to 4.3 until all those problems will be fixed, because the phone is working sluggish, messaging app is crushing from time to time, animations between activities are slow and annoing and I observed 4 random watchdog restarts without any reason.
