Battery drain related to mobile data

[oliv4]

Hi,

I used successfully lineage-17.1-20200220-UNOFFICIAL-serranoltexx for a while, it worked great, but for some reason, the phone started to drain the battery and loose 10% of capacity per hour. In the meantime, I could pinpoint the issue. The drain happens only if the mobile data is on, but even if I have a good, working Wifi connection. Using BetterBatteryStats, I can see that the wakelock "bam_dmux_wakelock" is waking up the phone very often, which confirms that the issue is related to mobile data.

I have updated to lineage-17.1-20200220-UNOFFICIAL-serranoltexx and the modem to I9195XXUCQL2, which seems to be the latest for me (Germany, T-mobile). It didn't help.

2G/3G/4G doesn't make a difference. With 4G, signal strength is about -100 dbm, on 2G, -70 dbm, which seem like reasonable values.

I don't phone often, but I have also issues with the normal calls: I cannot pick up, or the call gets interrupted. Maybe the issues are related.

I am out of ideas how to investigate further. Is there any way to see the reason of the frequent ""bam_dmux_wakelock" ? Could it be a hardware issue ? Any other idea?

Thanks!

 

[Nokono]

@oliv4
You should address this in the topic of the rom you have installed
https://forum.xda-developers.com/galaxy-s4-mini/orig-development/rom-lineageos-17-1-s4-mini-t4045147

 

[oliv4]

@oliv4
You should address this in the topic of the rom you have installed
https://forum.xda-developers.com/galaxy-s4-mini/orig-development/rom-lineageos-17-1-s4-mini-t4045147

Thanks, but I did already and didn't get any feedback. It doesn't really belong there anyway, because I don't think it is a problem with the system. A lot of other users are happy with it, and so I was, until the problem started. It could be the modem, the carrier, a hardware issue... Therefore I started a new thread.

 

[oliv4]

I bought another used S4 mini, and I installed the same system ROM, and copied the complete data over. I have now good battery life times again, more than 24h. So it was actually a hardware issue. The S4 mini are getting old unfortunately.