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[FIX][ROOT] Disable Fast dormancy on sony smarthphones

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By mirhl, Senior Member on 28th July 2013, 09:08 PM
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COMPLETELY DISABLE FAST DORMANCY ON XPERIAs
fast dormancy should be a battery-saving feature of UMTS networks.

TESTED PHONES:¬°Your phone must be rooted to edit system files!

Instructions
  1. First of all, you'll need to know your carrier MCC and MNC. You can found these on wikipedia or in your APN settings
  2. Navigate and open ./etc/fast-dormancy/fd_custm_conf.txt
  3. You'll see two lines ending with MCC and MNC and two zeros
  4. Change those zeros with the codes you look earlier and save
  5. Reboot and enjoy

FAQ
What is fast dormancy and why should I bother?
Fast dormancy is a GSM feature which makes switching to sleep state faster

It seems a nice thing, where should I opt-in?
You are already in! Every recent phone supports this specification and sometimes it could really extend your battery life

So, what's all this bothering?
Well, the fact is that even though phones are usually perfect from this perspective.. unfortunately carriers are not. Some support this, other doesn't.
And wrong combinations can be battery killing. See the chart

OMG, I want my sleep mode back !11
Before doing anything, we must be sure you are affected by the problem. Asking directly to your carrier could be a nice thing. But sometimes this couldn't even be enough, since everything depends upon the antenna you are actually connected to.

So, how in the world could I check if I'm affected by the problem? :\
A first usual sign of the issue would be high "Android OS" battery usage and/or lots of com.sonyericsson.android.wakeup wakelocks.
Another quick testing method would be to simply use the fix for a few days and then revert your changes back if you find them unsatisfactory

I'm screwed! My phone isn't in the list or I can't find those files!
You had better first checking if the /etc/fast-dormancy/ folder is there and try. If not, check karkand's twin thread (be warned, potential brick inside)

Is this really worth the hassle?
D E F I N I T I V E L Y. Battery can last up to 30% longer after applying this fix! (admitted you had this problem before).
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28th July 2013, 09:23 PM |#2  
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Im gonna try it

But what exactly am i fixing/doing?
28th July 2013, 10:45 PM |#3  
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Quote:
Originally Posted by mirhl

prologue: a week ago i updated to stock jelly bean and i noticed soon noticed LOTS of com.sonyericsson.android.wakeup wakelocks (something like 2900 in half a day)
this is due to my carrier to have not enabled fast dormancy on their antennas


i first tried to freeze fastdormancy app, but this led only to a little lower wakelocks count (the problem was still there)

so, after some invastigation here and there i finally found a solution:

1 - First of all, you'll need to know your carrier MCC and MNC. You can found these on wikipedia or in your APN configuration
2 - Then navigate and open /etc/fast-dormancy/fd_custm_conf.txt
3 - you'll see two lines ending with MCC and MNC and two zeros
4 - Change those zeros to that you look earlier and save
5 - Reboot and enjoy

this worked flawlessly on my xperia S. i'm quite sure it will work on xperia ion and acro too
and i'm confident that it should work even on others models (judging from)

let me know if it works on custom rom too!

Fast dormancy is also enabled in 6.2.B.0.200 ramdisk

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28th July 2013, 10:51 PM |#4  
mirhl's Avatar
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Quote:
Originally Posted by Mr Patchy Patch

Im gonna try it

But what exactly am i fixing/doing?

Fast dormancy is a umts feature that SHOULD improve a bit data battery usage
But this has to be supported both from your carrier and from your phone
If one of these two doesn't support fdm (but the other does) you'll have an extreme battery drain (which you can see in a logcat or in the allarm tab of betterbatterystats)

If both parts has this support this fix could even led to an heavier battery drain

I have posted this guide because i read A LOT about this.. but all that i could find regarded only samsung and lg phones..

More news here
http://www.xda-developers.com/xda-tv...-developer-tv/

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28th July 2013, 10:59 PM |#5  
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@Forzaferrarileo
This could explain why i still see many

Code:
D/fast-dormancy(164): [FDM]: match with exclude list, so quit match procedure
in the main logcat

Anyway, i don't notice any more alarm ring from com.sonyericsson.android.wakeup (and i think this should be sufficient to solve the issue)
What do you think?
potremmo anche discuterne scialli in privato


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28th July 2013, 11:11 PM |#6  
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Quote:
Originally Posted by mirhl

@Forzaferrarileo
This could explain why i still see many

Code:
D/fast-dormancy(164): [FDM]: match with exclude list, so quit match procedure
in the main logcat

Anyway, i don't notice any more alarm ring from com.sonyericsson.android.wakeup (and i think this should be sufficient to solve the issue)
What do you think?
[SPOILER]potremmo anche discuterne scialli in privato [/SPOILER]

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Yes, anyway I'll made 2 version with different ramdisk

[SPOILER] se hai gtalk ancora meglio, almeno non si intasa La casella di xda[/SPOILER]

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skywalkerdroid
28th July 2013, 11:28 PM |#7  
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This works only when you are connected to internet through your carrier right? Not working when connected through wifi.
28th July 2013, 11:44 PM |#8  
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Quote:
Originally Posted by skywalkerdroid

This works only when you are connected to internet through your carrier right? Not working when connected through wifi.

Yes, only 3g/2g connection

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skywalkerdroid
29th July 2013, 12:15 AM |#9  
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That's what I thought. Nice tweak anyway.
29th July 2013, 07:35 AM |#10  
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thanx a lot man
30th July 2013, 02:32 PM |#11  
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Quote:
Originally Posted by mirhl

prologue: a week ago i updated to stock jelly bean and i noticed soon noticed LOTS of com.sonyericsson.android.wakeup wakelocks (something like 2900 in half a day)
this is due to my carrier to have not enabled fast dormancy on their antennas


i first tried to freeze fastdormancy app, but this led only to a little lower wakelocks count (the problem was still there)

so, after some invastigation here and there i finally found a solution:

1 - First of all, you'll need to know your carrier MCC and MNC. You can found these on wikipedia or in your APN configuration
2 - Then navigate and open /etc/fast-dormancy/fd_custm_conf.txt
3 - you'll see two lines ending with MCC and MNC and two zeros
4 - Change those zeros to that you look earlier and save
5 - Reboot and enjoy

this worked flawlessly on my xperia S. i'm quite sure it will work on xperia ion and acro too
and i'm confident that it should work even on others models (judging from)

let me know if it works on custom rom too!

Could this be similar to add "ro.semc.enable.fast_dormancy=false" to build.prop?

Thanks for your help
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Tags
battery, com.sonyericsson.android.wakeup, fast dormancy, sony xperia, wakelock

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