topic Re: Bluetooth bug does not allow the Z3 to deep sleep + battery drain in XPERIA archive

Bluetooth bug does not allow the Z3 to deep sleep + battery drain

vittogn — Tue, 24 Mar 2015 10:16:49 GMT

I'm with a 5.0.2 D6603.

The issue I have is that the following Kernel wakelocks does not allow the phone to deep sleep.

msm_serial_hs_dma
BTLowPower

I've just performed a sw repair via pc companion, and several factory reset. I'm running the Z3 with no apps.

It happens both with an LG G Watch R (5.0.2) and a regular BT Plantronics (voice only) headset.

Using the same BT devices with a Nexus 4, Nexus 10 and an LG G2 does not have the same effect. As soon as there is no usage the phone goes to speep immediately.

If we take the second device, I do expect a Kernel wakelock while speaking or streaming music. The phone is active any way while performing this task.
What is strange is that even if there is no activity the wakelocks avoid deep sleep.
What is strange is that if I move away from the headset (and the BT icon goes the "non connected" status), the wakelocks are always there.

The effect is that my phone (both on 4.4.4 and 5.0.2) almost never ever sleeps, and sometimes get warm. It is evident that the battery life affected a lot.
If I switch BT off, everything goes back to normal.

I did a further test, in the below sequence:

- BT ON + connected to a Plantronics headset => wakelock + device always on
- BT ON + disconnected to a Plantronics headset => wakelock + device always on
- BT OFF + disconnected to a Plantronics headset => no wakelock + device sleep
- BT ON + disconnected to a Plantronics headset => wakelock + device always on

Any solution?

Is it possible that this is an hardware problem?

This thing is driving me crazy!!!!

Thanks in advance.

Vittore

Re: Bluetooth bug does not allow the Z3 to deep sleep + battery drain

Thommo — Tue, 24 Mar 2015 10:59:23 GMT

Do you have Stamina mode enabled and if it is have you added an app or device to the exception list which will prevent sleep mode, try an app like Wakelock detector to see if you have an app or something else which is the cause

Re: Bluetooth bug does not allow the Z3 to deep sleep + battery drain

vittogn — Tue, 24 Mar 2015 11:45:31 GMT

Hi Thommo, thanks for quick help.

I have stamina mode enabled with the following app white listed:

Gmail

Hangouts

Touchdown

They all have nothing to do with BT. If BT is off, the phone get into deep sleep well, or at least it is not always active. Then stamina should affect mobile data only, not BT.

Better Battery Stats says that the following kernel wakelocks are keeping the phone atcive while BT is on:

msm_serial_hs_dma
BTLowPower

Thanks a lot.

Waiting for your help.

Re: Bluetooth bug does not allow the Z3 to deep sleep + battery drain

Thommo — Tue, 24 Mar 2015 12:03:14 GMT

That item you listed is known to prevent sleep from back in 2012 and to fix you need to decompile and rebuild the item with amended code - However you still could have an app hence why I mentioned the app to check

Re: Bluetooth bug does not allow the Z3 to deep sleep + battery drain

vittogn — Tue, 24 Mar 2015 12:56:46 GMT

Hi Thommo,

thanks a lot for your help.

It's a good progress that at least I know it is sw bug and not an hw one!

It is not clear to me what I should "decompile and rebuild the item with amended code". I'm not a Sony engenieer.

Is this known bug, something related to Sony implementation of BT radio?

If yes, how is it possible that the bug is still there 3 years later on the flagship Z3 updated to Lollipop one week ago?
If no: are you referring to apps that keep the phone active wile BT is on? Can you help me in understanding how to find this app?

I switched BT on and the wakelocks (in better battery stats) started again keeping the phone active.

In wakelock detector under kernel wakelocks I can notice that ipc000000ef_sensors.qcom has the highest number (7387 in 3h).

Then I have ipc0000008c_sensors.qcom (649 in 3h).

Can you help me please?

Where should I seek for the rouge app?

Thanks a million.

Vittore

Re: Bluetooth bug does not allow the Z3 to deep sleep + battery drain

vittogn — Tue, 24 Mar 2015 13:12:11 GMT

I've just noticed that in WLD under CPU WL I have UID [Type: System (Bluetooth) - bluedroid_timer] is the biggest WL.

Is this helpful? Is this related to this 2012 bug?

Thanks.

Re: Bluetooth bug does not allow the Z3 to deep sleep + battery drain

Thommo — Tue, 24 Mar 2015 14:20:46 GMT

Bluedroid is new for Lollipop and has been noted by other OEM's as an issue so not a Sony specific issue so this will be upto Google to fix

Re: Bluetooth bug does not allow the Z3 to deep sleep + battery drain

Thommo — Tue, 24 Mar 2015 14:21:41 GMT

and Google are aware of it as per the Google forums

Re: Bluetooth bug does not allow the Z3 to deep sleep + battery drain

vittogn — Tue, 24 Mar 2015 14:31:28 GMT

Understood. Thanks.

It must be, any way, not the source of my issue as I had the same wakelocks on 4.4.4.

Going back to "good old 2012 wakelocks":

It is not clear to me what I should "decompile and rebuild the item with amended code". I'm not a Sony engenieer.

Is this known bug, something related to Sony implementation of BT radio?

If yes, how is it possible that the bug is still there 3 years later on the flagship Z3 updated to Lollipop one week ago?
If no: are you referring to apps that keep the phone active wile BT is on? Can you help me in understanding how to find this app?

I switched BT on and the wakelocks (in better battery stats) started again keeping the phone active.

In wakelock detector under kernel wakelocks I can notice that ipc000000ef_sensors.qcom has the highest number (7387 in 3h).

Then I have ipc0000008c_sensors.qcom (649 in 3h).

Can you help me please?

Where should I seek for the rouge app?

Thanks a million.

Vittore

Re: Bluetooth bug does not allow the Z3 to deep sleep + battery drain

Thommo — Tue, 24 Mar 2015 15:28:10 GMT

This is something you would need to contact Xperia care about as we are a user led support forum, All
I can do is use that useful engine known as Google and find out some pertinent information which is what I did - Anything above and beyond that is out of my range - http://www.sonymobile.com/global-en/support/contact-us/

Re: Bluetooth bug does not allow the Z3 to deep sleep + battery drain

vittogn — Tue, 24 Mar 2015 15:34:33 GMT

Sorry, I didn't know you are a user like me.

Sony support will ask to perform a factory reset. Then I'll go to a center, they'll perform a factory reset and do their basic test = all good. Here is your device after one month with the same problem (nothing against Sony, they all are the same in my experiance).

If you can think of something (given your great experience with Sony Xperias) it will be much apreciated.

Thanks again.

Re: Bluetooth bug does not allow the Z3 to deep sleep + battery drain

Thommo — Tue, 24 Mar 2015 15:43:57 GMT

From what I can find it is and has been an issue with all OEM's

Re: Bluetooth bug does not allow the Z3 to deep sleep + battery drain

vittogn — Tue, 24 Mar 2015 15:57:03 GMT

Agreed. As I said nothing particular to Sony. I had very bad experiences with Samsung and Asus as well.

I'm so sad that such a great phone like the Z3 has this issue that does not allow me to use any BT device.

Re: Bluetooth bug does not allow the Z3 to deep sleep + battery drain

Johan — Tue, 24 Mar 2015 16:03:19 GMT

Could you please send me your details in a PM, and I will forward this.

Make a relevant topic and include the following.

Name:
Phone nr:
E-mail:
Country:
Operator:
Product(s):
IMEI nr:
Build number:

Also please dump and upload the phone logs to a site, such as Google Drive and send me the link.

You can dump the phone logs by right clicking the systray icon for PCC and choose About.

Re: Bluetooth bug does not allow the Z3 to deep sleep + battery drain

vittogn — Tue, 24 Mar 2015 16:12:01 GMT

Thanks.

Data sent via PM.

I'll perfom the dump tonight at home. Any suggestion in doing it? e.g. creating the issue just before doing the report?

Thanks for super quick feedback.

Re: Bluetooth bug does not allow the Z3 to deep sleep + battery drain

Johan — Tue, 24 Mar 2015 16:38:39 GMT

Exactly @vittogn , replicate it then dump the logs.

Re: Bluetooth bug does not allow the Z3 to deep sleep + battery drain

vittogn — Tue, 24 Mar 2015 20:21:14 GMT

@Johan dump(s) done and link PMd.

Thanks.

Re: Bluetooth bug does not allow the Z3 to deep sleep + battery drain

vittogn — Wed, 25 Mar 2015 10:08:40 GMT

Hi @Johan, just a quick note to be sure that the link I provided via PM for system dumps is working.

Thanks.

Vittore

Re: Bluetooth bug does not allow the Z3 to deep sleep + battery drain

vittogn — Thu, 26 Mar 2015 12:21:40 GMT

Here a self explanatory comparison in between two very simalar days. The first is with a BT device connected (just connected not streaming or talking). The second (NO BT - ....) is without. The deep sleep attitude is very different!!

Re: Bluetooth bug does not allow the Z3 to deep sleep + battery drain

vittogn — Fri, 27 Mar 2015 10:22:16 GMT

Hi @Johan do you have any news?

I start getting nervous of having some BT devices (watch and headset) that I can't use because of the Z3.

I'm also planning to get rid of the Z3 and move forward. This would be very sad as the phone is otherwise fantastic and I still want to love it.

In the meantime, can I do a tests? I'm very happy to do whatever could be helpful for Sony to root cuase (and solve) the issue. The issue is very easy to reproduce. Can I produce a detailed system log? Is there any other app that I can install that can help?

Thanks.