After the latest over the air update from Sony, the standby time om my Xperia Performance was reduced from approx. 350 hours (using about 0,3 % per hour) to 10 hours, using about 10% of battery pr. hour. The batter usage in standby is 35 times higher than before the update. The phone is getting hot in my pocket and is useless. The problem occurs when my phone is on a 3G network, with no Wi-Fi coverage. When the Phone is on 4G and on 2G there is no problems. There is no problem when the phone has 3G coverage and Wi-Fi connection. The problem is not related to poor coverage, because I have the same problem when I am very close to a base station.
I have done all the basic trouble shooting, factory reset, turned location service off.
Sony must have forgotten to test the combination with 3G only and Wi-Fi off during the latest update.
I have very poor 4G coverage in the area where I live, and my provider (Telia) has disabled VoLTE. Because of that, I have turned of 4G and have configured my phone to automatically switch between 2G and 3G.
The error is easily identified by the “Better Battery Stats” APP. It says that the RILJ (Java Radio Interface Layer) is constantly creating wakelock’s, preventing the main (App) processor, to go to sleep. Now, the phone has over 50000 RILJ wakelock’s for one night.
On devices like the Xperia, there is one App processor and one baseband processor. The App processor is running the Android operations system and the applications. The baseband processor runs its own realtime OS and handles radio communication. The RILJ is a software component that handles communication with the baseband processor. I suspect that after the latest update, there is a software error constantly creating interrupts, preventing the main processor to go to sleep, thus draining the battery. During OTA updates, the baseband OS and the Android OS could be updated.
My problem, is that Sony support only tells me to ship the phone to the closest repair center, and have it repaired. The repair center would only do a reflash and a standard test procedure, and send it back, saying the phone is ok. I will then be without a phone for a mouth.
I am very frustrated with the situation. I am now going to a holiday, and having a Smartphone is a must.
