parag1dubey
Android Enthusiast
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l2hsic wakelock
- Thread starter parag1dubey
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- samsung galaxy s2
parag1dubey
Android Enthusiast
Ironass, I am going to bombard you with screenshots now so please bear with me...
This is a screen of after I removed the sim card as per your instructions. As you can see, l2hsic showed up even without a sim...
This is a screen i captured after reinserting sim and leaving the phone overnight...
In the morning, the l2hsic wakelock once again shows up...
I wonder what this could mean???? As you can see, 95% deep sleep is a record for me but it could be so much better without l2hsic... I hope you get time to take a look at this ironass .... Thanks mate...
This is a screen of after I removed the sim card as per your instructions. As you can see, l2hsic showed up even without a sim...
This is a screen i captured after reinserting sim and leaving the phone overnight...
In the morning, the l2hsic wakelock once again shows up...
I wonder what this could mean???? As you can see, 95% deep sleep is a record for me but it could be so much better without l2hsic... I hope you get time to take a look at this ironass .... Thanks mate...
ironass
Extreme Android User
Good morning parag1dubey!
Initial reaction is... You had a l2_hsic wakelock of 2.7% yesterday and it is now down to 0.8%... which is good!
95.5% Deep Sleep under the circumstances is also good!
Your main concern is your battery life.
You are also unduly worried by the l2_hsic wakelock that is showing in BetterBatteryStats.
Lets deal with the l2_hsic wakelock first as this is something that has interested me for awhile now and there is very little information on the subject and what here is, is sketchy.
HSIC, (High Speed Inter Chip), would seem to interact with the CPU and RIL, (Radio Interface Layer) and other hardware on your phone. This HSIC is made up of 7 layers, as shown here and it is speculated that l2 is the second layer or Data Link Layer.
RIL is the bit that translates between hardware and software as explained in this pseudo Dummies Guide post, here.
This is why it is desirable to have a matching modem and RIL as this can cut down on wakelocks. See Hawker's thread, here.
The Jelly Bean, leaked, ROM only has one modem and RIL to-date, XXLS6, which is a European modem. Therefore you do not have the choice at present of trying out, say, a DD modem for India, as you could with ICS or GB. That is not to say that the DD, or any other modem would be significantly any better but if it is designed for India there's usually a reason.
Your only/primary signal is EDGE.
The l2_hsic wakelock appears any time that your phone tries to connect to send or receive data. This is why it was showing when no sim card was present I guess as it was waking up to try and connect.
Certain kernels, notably Siyah, handle, for me, the l2_hsic wakelock better than others. For instance, stock, PhilZ and Jeboo were giving me a higher wakelock than the last two Siyah's. Around 3%, down to under 1%.
Therefore, I do not think that your latest reading of 0.8% is anything to worry about at all as far as the l2_hsic wakelock is concerned.
Let's look at your signal and general battery life.
You are showing a very strong EDGE signal which is your only/primary signal. Therefore it makes sense to set your Network mode to, "GSM only", as you do not want your phone to be searching constantly for H or H+. Also, since Fadt Dormancy does not operate with EDGE, it is important for your battery life to disable this function.
parag1dubey signal
Your screenshot shows that you have a strong and steady signal, albeit on EDGE, that is hardly fluctuating and not disconnecting.
ironass signal
This is my signal at home this morning. Again it hardly fluctuates. However, it is not as strong as yours because HSDPA does not carry as far as EDGE.
The difference between the two signals is nothing as far as calls go. Where the difference shows is with data.
Your main concern was battery usage and this is not helped by an EDGE signal I'm afraid. Since all smartphones use data for all sorts of things such as Location, Weather, Play Store, Widgets, Sync'ing, YouTube... and the list goes on and on, it is important to your phone to be able to communicate, to a greater or lesser degree, via a data connection.
Therefore, it is important, as far as battery usage is concerned, on how long your phone is awake when sending or receiving data.
parag1dubey Speedtest
ironass Speedtest
As you can see from the above screenshots, there is a big difference in Download and Upload speeds between EDGE and HSDPA.
What this means in practice is that when your phone is awake and receiving data, it is connected a lot longer on EDGE than HSDPA. For instance, if we both connected to our respective networks and downloaded 10MB of data, my phone would be awake and connected for a little over a second and if I were sending the same amount of data, 10MB, it would be awake for about 4 seconds. Compare this to the EDGE transfer speeds and the same Download for you would be 81 seconds and for upload, about 68 seconds.
So, you can see from this that on the EDGE signal, your phone is awake and active considerably longer than it would be on HSDPA. This means that when you are sending/receiving data you are using more battery life.
There is nothing you can do about this data and battery usage except for..
1. Change to a network, if possible, that you can get 3G, H or H+ on or use Wi-Fi wherever possible or even, turn data off at night.
2. Limit your data connections as far as possible. No sync'ing with Twitter every 15 min's which I know you used to do!!! Judging fom your screenshot of BBS and your Deep Sleep, I'm guessing you've curtailed that habit.
Other than the above, I can see no obvious problems that you need to address.
Initial reaction is... You had a l2_hsic wakelock of 2.7% yesterday and it is now down to 0.8%... which is good!
95.5% Deep Sleep under the circumstances is also good!
Your main concern is your battery life.
You are also unduly worried by the l2_hsic wakelock that is showing in BetterBatteryStats.
Lets deal with the l2_hsic wakelock first as this is something that has interested me for awhile now and there is very little information on the subject and what here is, is sketchy.
HSIC, (High Speed Inter Chip), would seem to interact with the CPU and RIL, (Radio Interface Layer) and other hardware on your phone. This HSIC is made up of 7 layers, as shown here and it is speculated that l2 is the second layer or Data Link Layer.
RIL is the bit that translates between hardware and software as explained in this pseudo Dummies Guide post, here.
This is why it is desirable to have a matching modem and RIL as this can cut down on wakelocks. See Hawker's thread, here.
The Jelly Bean, leaked, ROM only has one modem and RIL to-date, XXLS6, which is a European modem. Therefore you do not have the choice at present of trying out, say, a DD modem for India, as you could with ICS or GB. That is not to say that the DD, or any other modem would be significantly any better but if it is designed for India there's usually a reason.
Your only/primary signal is EDGE.
The l2_hsic wakelock appears any time that your phone tries to connect to send or receive data. This is why it was showing when no sim card was present I guess as it was waking up to try and connect.
Certain kernels, notably Siyah, handle, for me, the l2_hsic wakelock better than others. For instance, stock, PhilZ and Jeboo were giving me a higher wakelock than the last two Siyah's. Around 3%, down to under 1%.
Therefore, I do not think that your latest reading of 0.8% is anything to worry about at all as far as the l2_hsic wakelock is concerned.
Let's look at your signal and general battery life.
You are showing a very strong EDGE signal which is your only/primary signal. Therefore it makes sense to set your Network mode to, "GSM only", as you do not want your phone to be searching constantly for H or H+. Also, since Fadt Dormancy does not operate with EDGE, it is important for your battery life to disable this function.
parag1dubey signal
Your screenshot shows that you have a strong and steady signal, albeit on EDGE, that is hardly fluctuating and not disconnecting.
ironass signal
This is my signal at home this morning. Again it hardly fluctuates. However, it is not as strong as yours because HSDPA does not carry as far as EDGE.
The difference between the two signals is nothing as far as calls go. Where the difference shows is with data.
Your main concern was battery usage and this is not helped by an EDGE signal I'm afraid. Since all smartphones use data for all sorts of things such as Location, Weather, Play Store, Widgets, Sync'ing, YouTube... and the list goes on and on, it is important to your phone to be able to communicate, to a greater or lesser degree, via a data connection.
Therefore, it is important, as far as battery usage is concerned, on how long your phone is awake when sending or receiving data.
parag1dubey Speedtest
ironass Speedtest
As you can see from the above screenshots, there is a big difference in Download and Upload speeds between EDGE and HSDPA.
What this means in practice is that when your phone is awake and receiving data, it is connected a lot longer on EDGE than HSDPA. For instance, if we both connected to our respective networks and downloaded 10MB of data, my phone would be awake and connected for a little over a second and if I were sending the same amount of data, 10MB, it would be awake for about 4 seconds. Compare this to the EDGE transfer speeds and the same Download for you would be 81 seconds and for upload, about 68 seconds.
So, you can see from this that on the EDGE signal, your phone is awake and active considerably longer than it would be on HSDPA. This means that when you are sending/receiving data you are using more battery life.
There is nothing you can do about this data and battery usage except for..
1. Change to a network, if possible, that you can get 3G, H or H+ on or use Wi-Fi wherever possible or even, turn data off at night.
2. Limit your data connections as far as possible. No sync'ing with Twitter every 15 min's which I know you used to do!!! Judging fom your screenshot of BBS and your Deep Sleep, I'm guessing you've curtailed that habit.
Other than the above, I can see no obvious problems that you need to address.
parag1dubey
Android Enthusiast
I havent even had coffee yet! Just a cup of indian ginger tea with a cracker... But yes, I see that the wakelock might have gone down... In the meantime, I am flashing dori 7.38 and we ll see if l2hsic still remains.. As an aside, three questions (which one cup of coffee will be sufficient to answer 
) ... Have you flashed dori 7.38 yet? Are you a twitter user (on S2)? Which, if any, launcher do you use? (answer as per your convenience, after pouring as much coffee as you can stomach 
)
Oh and a Good Morning to you too, ironass!
) ... Have you flashed dori 7.38 yet? Are you a twitter user (on S2)? Which, if any, launcher do you use? (answer as per your convenience, after pouring as much coffee as you can stomach )Oh and a Good Morning to you too, ironass!
parag1dubey
Android Enthusiast
Thank you ironass, although it is much harder to shut me up than that But I can sympathize with you...At 7.25 am, I would be just as cranky as you So i will leave you to your coffee and breakfast...But in the words of T-101, I'll be back
But I can sympathize with you...At 7.25 am, I would be just as cranky as you So i will leave you to your coffee and breakfast...But in the words of T-101, I'll be back
parag1dubey
Android Enthusiast
Maybe you are right hawker, but the l2hsic wakelock gets unusually long when i am actually using the device as opposed to screen off times, which is when the screenshots were taken ...
Hawker
Android Expert
The more you use it, the more wakelocks you will get.
Its like saying I've been playing music for the last hour and I have a huge audio wakelock. These wakelocks are making your phone work.
wakelocks are bad if they creep up suspiciously when your device is idle.
Its when you have a large number of "awake" ticks on your battery screen graph that do not correspond to "screen on" ticks is when you should address wakelocks.
wakelocks when screen is on (ie device is being used) are natural
Its like saying I've been playing music for the last hour and I have a huge audio wakelock. These wakelocks are making your phone work.
wakelocks are bad if they creep up suspiciously when your device is idle.
Its when you have a large number of "awake" ticks on your battery screen graph that do not correspond to "screen on" ticks is when you should address wakelocks.
wakelocks when screen is on (ie device is being used) are natural
parag1dubey
Android Enthusiast
Ironass, my friend, will you stop editing the same post over and over!!! Beating a dead horse, you are Please post afresh when you get new ideas ... I have flashed 7.38 now... Just so you know.... l2hsic has shown up... I will post a screenshot later in the day so that you and everyone else can take a look... Have a wonderful day ironass
Ironass, as i told you in my PM (which you unceremoniously ignored:dontknow: ), I have deleted twitter app Wanted to let you know so that you know just in case l2hsic is caused by some malfunctioning app....
Please post afresh when you get new ideas ... I have flashed 7.38 now... Just so you know.... l2hsic has shown up... I will post a screenshot later in the day so that you and everyone else can take a look... Have a wonderful day ironass Ironass, as i told you in my PM (which you unceremoniously ignored:dontknow: ), I have deleted twitter app
Wanted to let you know so that you know just in case l2hsic is caused by some malfunctioning app....
parag1dubey
Android Enthusiast
I understand hawker, but again l2hsic creeps up even when the screen is off.. I hope you are right and both me and ironass are on a wild goose chase (which is satisfying in its own right
) , but I have never had this wakelock on neatrom JB before, hence my concern...
ironass
Extreme Android User
Ironass, my friend, will you stop editing the same post over and over!!! Beating a dead horse, you are
Hard luck!
I've already posted it in an attempt to encapsulate as much as possible in one post rather than spreading the information out all over the place.
Stop grumbling and hit the thanks button.... lots!
EDIT Blooming heck! Hawker and I agree! :ahhhhh:
parag1dubey
Android Enthusiast
Thanks a ton mate! I loved reading your Modem Ril pseudo guide I understand now, that edge is slow in data speeds and hence a longer wakelock... But I had switched to 3g about a fortnight back. At that time I experienced secril fd interface wakelock and worse battery life and hence I switched back to EDGE. Regarding twitter. I just deleted the app this morning.. Damn the celeb chicks..However sexy they are, one can't touch them via twitter ... I am better off trying to find a new girlfriend in the real world (for which you will no doubt offer me advice ) ... Ahem, coming back to the point, now my only data needs seem to be for gmail, playstore and xda app... I will take your advice and try to switch to H/H+ signal when my current EDGE data plan comes to an end..
I understand now, that edge is slow in data speeds and hence a longer wakelock... But I had switched to 3g about a fortnight back. At that time I experienced secril fd interface wakelock and worse battery life and hence I switched back to EDGE. Regarding twitter. I just deleted the app this morning.. Damn the celeb chicks..However sexy they are, one can't touch them via twitter ... I am better off trying to find a new girlfriend in the real world (for which you will no doubt offer me advice ) ... Ahem, coming back to the point, now my only data needs seem to be for gmail, playstore and xda app... I will take your advice and try to switch to H/H+ signal when my current EDGE data plan comes to an end..
parag1dubey
Android Enthusiast
ironass
Extreme Android User
Thanks a ton mate! I loved reading your Modem Ril pseudo guide
secril_fed_interface wakelock is typically caused by having Fast Dormancy enabled on an unsupported network as described in this post by me the other day.
parag1dubey
Android Enthusiast
Regarding twitter. I just deleted the app this morning.. Damn the celeb chicks..However sexy they are, one can't touch them via twitter
Now, Ironass, you can refer and reply to this part of my post (after a couple more cups of coffee, maybe), while I watch an old episode of Sherlock and solve the case before him
:tee:
parag1dubey
Android Enthusiast
Damn the celeb chicks..However sexy they are, one can't touch them via twitter
Here you go....This part
Hawker
Android Expert
How often do they let you out of your padded cell to meet these blind deaf women with no sense of smell then butty?
parag1dubey
Android Enthusiast
Correction, ironass, hawker... I am no longer on twitter...facebook, G+, never was on them.....so, I am about ready to join you guys, wouldn't you say??
Hawker
Android Expert
Correction, ironass, hawker... I am no longer on twitter...facebook, G+, never was on them.....so, I am about ready to join you guys, wouldn't you say??
and you are correcting ME because...?
parag1dubey
Android Enthusiast
Because you liked ironass' post hawker which could mean that you agree with it, which in turn could mean that you think I am one of the guys referred to by ironass.....
:hello2:
:hello2:
Hi Guys,
I also appear to have a problem with l2_hsic. My search has led me to this. It started when I upgraded my Samsung Galaxy Tab 10.1 to Android 4.0.4. I noticed unacceptable battery drain overnight. To be precise, it is 1.4% per hour. Using GSam Battery Monitor and Better Battery Stats, I have established that l2_hsic is keeping my tab awake 90% of the time overnight.
A bit more information. My carrier is Vodafone UK and, because I am in a poor reception area, I have a Vodafone Sure Signal femtocell. So, I have a strong signal at home, which is where all my observations have been made. I do not know if the Sure Signal service supports Fast Dormancy but I have asked this question on the Vodafone forum.
Anything else I should try?
JPC
I also appear to have a problem with l2_hsic. My search has led me to this. It started when I upgraded my Samsung Galaxy Tab 10.1 to Android 4.0.4. I noticed unacceptable battery drain overnight. To be precise, it is 1.4% per hour. Using GSam Battery Monitor and Better Battery Stats, I have established that l2_hsic is keeping my tab awake 90% of the time overnight.
A bit more information. My carrier is Vodafone UK and, because I am in a poor reception area, I have a Vodafone Sure Signal femtocell. So, I have a strong signal at home, which is where all my observations have been made. I do not know if the Sure Signal service supports Fast Dormancy but I have asked this question on the Vodafone forum.
Anything else I should try?
JPC
ironass
Extreme Android User
You could try turning off Fast Dormancy and see if that helps after 1 or 2 days. Getting a straight answer from Vodafone on the subject of FD was like pulling teeth. I just toggled between on and off until I found which gave the lowest wakelock. Although I have to say that 1.6% isn't too bad.