[Galaxy Note GT-N7000 Q&A, Help & Troubleshooting] sarf2k4:
Conclusion

I'm concluding that by switching the network type into GSM only does have a great impact on battery life especially for users that doesn't have a good WCDMA coverage. As the data shows, the l2_hsic mostly shows below 1% on kernel wakelocks. As explained in the OP, l2_hsic is a chip that saves the current network state and cell location and will keep itself refreshed to get a better reception and thus, making the phone having a hard time in going into deep sleep and WCDMA networks still not covers the whole globe with 80-100% reception.

Even with wifi 100% on throughout the data gathering (since custom ref.), the phone still uses at average of 1.5%/h and with the battery stats screenshot I provided, it shows that there is a wakelocks (for maybe 1-2 hours total duration) but the deep sleep state is 97% in the cpu states.

So, once again, this is the data of my phone and for those who are having a hard time dealing with l2_hsic wakelocks that would drain your battery for almost 6%/hr, kindly switch to GSM mode (Setting>More Setting>Mobile Networks>Network mode). I rarely uses data connection on my phone unless I had to use the data connection, I switched back to dual mode. :)

P.s:

Although the data gathering is very small, by having a feedback from most people in this forum having l2_hsic issues trying out the GSM only mode would help. This is only the conclusion I've learned from thee days of data gathering during my sleep hours on my phone only.

I hope this information helps a lot of people out there having l2_hsic issues :)

===================

General Information

===================

BetterBatteryStats version: 1.11.0.0

Creation Date: 2012-12-10 13:02:43

Statistic Type: (4) Custom Reference

Since 8 h 34 m 57 s

VERSION.RELEASE: 4.1.2

BRAND: samsung

DEVICE: GT-N7000

MANUFACTURER: samsung

MODEL: GT-N7000

OS.VERSION: 3.0.31-549786

BOOTLOADER: unknown

HARDWARE: smdk4210

FINGERPRINT: samsung/GT-N7000/GT-N7000:4.1.2/JZO54K/N7000XXLSA:user/release-keys

ID: JZO54K

TAGS: release-keys

USER: se.infra

PRODUCT: GT-N7000

RADIO: N7000XXLSC

Rooted: true

============

Battery Info

============

Level lost [%]: 10 Bat.: 10% (87% to 77%) [1.2%/h]

Voltage lost [mV]: -10 (3914-3924)

===========

Other Usage

===========

Deep Sleep (): 8 h 21 m 35 s (30095 s) Ratio: 97.4%

No Data Connection (): 8 h 34 m 57 s (30897 s) Ratio: 100.0%

No or Unknown Signal (): 8 h 34 m 57 s (30897 s) Ratio: 100.0%

Wifi On (): 8 h 34 m 57 s (30897 s) Ratio: 100.0%

Wifi Running (): 8 h 34 m 57 s (30897 s) Ratio: 100.0%

Awake (): 13 m 21 s (801 s) Ratio: 2.6%

Screen On (): 46 s (46 s) Ratio: 0.1%

=========

Wakelocks

=========

AlarmManager (Android System): 4 m 6 s (246 s) Count:246 0.8%

EM/android_talk7313477b7f19 (Google Services): 1 m 12 s (72 s) Count:6 0.2%

GTALK_ASYNC_CONN_com.google.android.gsf.gtalkservice.AndroidEndpoint (Google Services): 1 m 10 s (70 s) Count:140 0.2%

ConnectivityService (Android System): 59 s (59 s) Count:478 0.1%

AudioOut_2 (1013): 10 s (10 s) Count:1 0.0%

AlarmManager (Google Services): 3 s (3 s) Count:296 0.0%

AlarmReceiver (com.sec.android.app.clockpackage.Clock): 2 s (2 s) Count:1 0.0%

ActivityManager-Launch (Android System): 2 s (2 s) Count:25 0.0%

Event Log Service (Google Services): 2 s (2 s) Count:23 0.0%

RILJ (Phone): 2 s (2 s) Count:173 0.0%

AlarmManager (com.sec.spp.push.Samsung Push Service): 2 s (2 s) Count:95 0.0%

NetworkLocationPassiveCollector (com.google.android.apps.maps.Maps): 2 s (2 s) Count:10 0.0%

SMSDispatcher (Phone): 1 s (1 s) Count:2 0.0%

FacebookService (com.facebook.katana.Facebook): 1 s (1 s) Count:2 0.0%

AlarmManager (com.google.android.apps.maps.Maps): 1 s (1 s) Count:58 0.0%

GTALK_CONN (Google Services): 1 s (1 s) Count:119 0.0%

StartingAlertService (com.android.mms.Messaging): 1 s (1 s) Count:1 0.0%

PhoneWindowManager.mBroadcastWakeLock (Android System): 1 s (1 s) Count:27 0.0%

================

Kernel Wakelocks

================

"PowerManagerService" (): 4 m 13 s (253 s) Cnt:(c/wc/ec)357/0/0 0.8%

"l2_hsic" (): 3 m 38 s (218 s) Cnt:(c/wc/ec)378/134/378 0.7%

"wlan_rx_wake" (): 2 m 27 s (147 s) Cnt:(c/wc/ec)93/0/94 0.5%

"alarm_rtc" (): 1 m 58 s (118 s) Cnt:(c/wc/ec)173/0/53 0.4%

"sec-battery-monitor" (): 1 m 50 s (110 s) Cnt:(c/wc/ec)323/145/0 0.4%

"radio-interface" (): 1 m 47 s (107 s) Cnt:(c/wc/ec)110/0/0 0.3%

"umts_ipc0" (): 1 m 10 s (70 s) Cnt:(c/wc/ec)125/0/125 0.2%

"alarm" (): 1 m 6 s (66 s) Cnt:(c/wc/ec)300/0/0 0.2%

"wlan_ctrl_wake" (): 12 s (12 s) Cnt:(c/wc/ec)11/0/11 0.0%

"wlan_wake" (): 6 s (6 s) Cnt:(c/wc/ec)2019/31/0 0.0%

"rpm_hsic" (): 6 s (6 s) Cnt:(c/wc/ec)34/0/0 0.0%

"power-supply" (): 3 s (3 s) Cnt:(c/wc/ec)311/0/0 -0.0%

"AudioOutLock" (): 2 s (2 s) Cnt:(c/wc/ec)1/0/0 0.0%

"mmc1_detect" (): (0 s) Cnt:(c/wc/ec)373/0/0 0.0%

"secril_fmt-interface" (): (0 s) Cnt:(c/wc/ec)989/0/0 0.0%

"unknown_wakeups" (): (0 s) Cnt:(c/wc/ec)1/0/1 0.0%

"tx_hsic" (): (0 s) Cnt:(c/wc/ec)857/0/0 0.0%

"sync_system" (): (0 s) Cnt:(c/wc/ec)2/0/0 0.0%

"mmc0_detect" (): (0 s) Cnt:(c/wc/ec)373/0/0 0.0%

"KeyEvents" (): (0 s) Cnt:(c/wc/ec)565/0/0 0.0%

======================

Alarms (requires root)

======================

android (): Wakeups: 47

Alarms: 1, Intent: android.intent.action.DATE_CHANGED

Alarms: 164, Intent: android.intent.action.TIME_TICK

Alarms: 17, Intent: com.android.server.action.NETWORK_STATS_POLL

Alarms: 39, Intent: com.android.server.ThrottleManager.action.POLL

Alarms: 34, Intent: android.appwidget.action.APPWIDGET_UPDATE

Alarms: 0, Intent: com.android.internal.policy.impl.PhoneWindowManager.DELAYED_KEYGUARD

Alarms: 9, Intent: android.app.backup.intent.RUN

Alarms: 4, Intent: android.content.syncmanager.SYNC_ALARM

com.google.android.gsf (): Wakeups: 43

Alarms: 3, Intent: com.google.android.intent.action.GTALK_RECONNECT

Alarms: 20, Intent: com.google.android.intent.action.MCS_HEARTBEAT

Alarms: 2, Intent: com.google.android.intent.action.SEND_IDLE

com.google.android.apps.maps (): Wakeups: 36

Alarms: 0, Intent: com.google.android.apps.maps.nlp.ALARM_WAKEUP_LOCATOR

Alarms: 2, Intent: com.google.android.apps.maps.nlp.ALARM_WAKEUP_ACTIVE_COLLECTOR

Alarms: 1, Intent: com.google.android.apps.maps.nlp.ALARM_WAKEUP_CACHE_UPDATER

com.sec.spp.push (): Wakeups: 28

Alarms: 25, Intent: com.sec.spp.push.HEARTBEAT_ACTION

Alarms: -1, Intent: com.sec.spp.push.REQUEST_TIME_OUT_ACTION

Alarms: -1, Intent: com.sec.spp.push.REQUEST_TIME_OUT_ACTION

Alarms: -1, Intent: com.sec.spp.push.REQUEST_TIME_OUT_ACTION

Alarms: 2, Intent: com.sec.spp.push.ALARM_TIMER_ACTION

com.google.android.googlequicksearchbox (): Wakeups: 3

Alarms: 0, Intent: send_events

com.android.providers.calendar (): Wakeups: 1

Alarms: 1, Intent: com.android.providers.calendar.intent.CalendarProvider2

======================

Network (requires root)

======================

10196 (Wifi) (com.facebook.katana.Facebook): 55.0 KBytes 33.8%

10195 (Wifi) (com.facebook.orca.Messenger): 31.0 KBytes 19.2%

10017 (Wifi) (Google Services): 30.0 KBytes 18.7%

0 (Wifi) (0): 13.0 KBytes 8.3%

10069 (Wifi) (com.sec.spp.push.Samsung Push Service): 12.0 KBytes 7.5%

10037 (Wifi) (com.google.android.apps.maps.Maps): 10.0 KBytes 6.1%

10157 (Wifi) (com.whatsapp.WhatsApp): 9.0 KBytes 5.8%

1000 (Wifi) (Android System): 763.0 Bytes 0.4%

10181 (Wifi) (com.sec.android.app.mystory.My Story): 360.0 Bytes 0.2%

==========

CPU States

==========

1.4 GHz (): 48 s 0.2%

1.2 GHz (): 3 s 0.0%

1 GHz (): 7 s 0.0%

800 MHz (): 2 m 18 s 0.4%

500 MHz (): 3 m 24 s 0.7%

200 MHz (): 6 m 54 s 1.3%

Deep Sleep (): 8 h 21 m 35 s 97.4%

==================

Reference overview

==================

Custom: Reference custom_ref created 1 d 15 h 55 s (Wl: 21 elements; KWl: 28elements; NetS: 38 elements; Alrm: 14 elements; Proc: 7 elements; Oth: 7 elements; CPU: 7 elements)

Since charged: Reference since_charged_ref created 1 d 11 h 51 m 43 s (Wl: 2 elements; KWl: 28elements; NetS: 36 elements; Alrm: 14 elements; Proc: 0 elements; Oth: 7 elements; CPU: 7 elements)

Since screen off: Reference since_screen_off created 0 s (Wl: null; KWl: null; NetS: null; Alrm: null; Proc: null; Oth: null; CPU: null)

Since unplugged: Reference since_unplugged_ref created 1 d 11 h 51 m 38 s (Wl: 0 elements; KWl: 28elements; NetS: 0 elements; Alrm: 1 elements; Proc: 0 elements; Oth: 7 elements; CPU: 7 elements)

Since boot: Reference since_boot created 54 s (Wl: 10 elements; KWl: 0elements; NetS: 6 elements; Alrm: 2 elements; Proc: 1 elements; Oth: 6 elements; CPU: 7 elements)