yashsingh1/xdaforums huggingface dataset:
[AT&T Samsung Galaxy S II SGH-I777] Entropy512:
That's I think the second report of someone saying it only happens with autobl - which gives me an idea where to look in the kernel code and also explains why I haven't seen it myself.

The first thing I do in order to save battery life is to kill autobl - it's so easy to change brightness using the notification bar swipe. :)
[AT&T Samsung Galaxy S II SGH-I777] slickie88:
At the time I did have auto brightness turned on. I've only recently turned it off (4 days or so) and have been using the notification bar slider to adjust brightness as needed. First time using that feature and I gotta say it sucks. No matter how I try it often adjusts brightness in jumps and spurts and is a pain to get a desired brightness level quickly. Probably going to go back to auto brightness.
[AT&T Samsung Galaxy S II SGH-I777] gr8hairy1:
You don't have to swipe 'per se'. You can just press and hold on a particular spot on the status bar. After awhile you'll have a good idea what 'spots' work best for you.

Sent from my páhhōniē
[AT&T Samsung Galaxy S II SGH-I777] jsmith8858:
Nice! Thank you, I never knew this, so much easier this way!
[AT&T Samsung Galaxy S II SGH-I777] tedkunich:
PITA with an otterbox commuter case and fat fingers :(
[AT&T Samsung Galaxy S II SGH-I777] desiromeo719:
Have auto brightness turned off and am still having capacitive button led issues....
[AT&T Samsung Galaxy S II SGH-I777] clumsywob:
Car Headunits

A lot of the navigation unit's I've demoed will stream audio over Bluetooth, however, it does not display the ID3 tags or anything like that. Is this something that can be tweaked on our phones? Apparently some Windows 7 phones will do this. I really wish companies would release a unit that will stream music app information to the head unit display with Android without requiring a stupid cable. They are all over the place with Apple support, just not Android yet.
[AT&T Samsung Galaxy S II SGH-I777] Jonnyredcorn:
So I have been running 1/02(non-experimental) for a little over a day now with no problems and battery has been fine.
[AT&T Samsung Galaxy S II SGH-I777] Nizda1:
I've been running 1/2 since released. Battery life is great, everything is running excellent, however today I noticed some lag or decreased sensitivity with the touchscreen. Its odd though and only happens within web browsers and only when clicking on a link or button, scrolling is perfect (tried a few browsers to make sure). Everywhere else its smooth as can be. I'm gonna try your work around for sensitivity see if it makes a difference.

Sent from my SAMSUNG-SGH-I777
[AT&T Samsung Galaxy S II SGH-I777] Entropy512:
Not a kernel thing...

I definitely have some sort of drain issue going on - It's not horrible, but it is noticeable and cause Android System to go to 50%. Only seems to happen when at home so it MIGHT be due to something changing around here and not patches I've put in since the 1/2 release.

Either way, until I get to the bottom of it, I won't be releasing what I've been running... Something just isn't quite right.
[AT&T Samsung Galaxy S II SGH-I777] shoman94:
It happened to my wife's sgs2 today. 70% Android OS. She hadn't rebooted in 4 days. I couldn't find the issue add I don't have better battery stats. I'd like to find a free app that does the same.
[AT&T Samsung Galaxy S II SGH-I777] garyd9:
XDA member version of BBS: free

http://xdaforums.com/showthread.php?t=1179809
[AT&T Samsung Galaxy S II SGH-I777] shoman94:
Thank you sir.
[AT&T Samsung Galaxy S II SGH-I777] garyd9:
I've been running experiments with Jan02, and I have to admit that the battery seems to be going a bit better. I have wifi at home, and there's SEVERAL AP's at my work (but I don't connect to any of them with my phone.) With wifi left on all day (15 minutes at home, 45 min commute, 8 hours at work) I drained 14% in 9 hours. I almost started to consider just leaving wifi on 24/7...

Today, I put "llama" back on my phone (turns off my wifi radio when I'm not near any of the cell towers near my house, turns wifi back on when I get home - so constantly getting notifications when I change towers) and I got the same 9 hours, but only drained 12%.

No real phone usage other than checking email (exchange pushed.) It's still pretty good in my opinion. My biggest drainage on the battery graph is "cell standby."

Take care

Gary
[AT&T Samsung Galaxy S II SGH-I777] Entropy512:
Different problem - I'm getting 50% "Android System" in a few cases (which I've never had before) - which is different from "Android OS". High "Android OS" is usually caused by something driving the wifi chip to wake up the CPU often, can be either:

Incoming network data due to an app (like Skype)

Incoming broadcast/multicast data that the phone sees (Windows Client Backup IPv6, UPnP SSDP, etc)

The UCKK6 "BT-AMP goes bat**** insane" bug

Experimental (.14) kernels hide (but don't fix) high AOS usage.

I had some sort of high-AOS situation happen last night instead of what I've been trying to track down lately - but I think it was due to playing with AllShare (aka UPnP AV) with my Galaxy Player 5.0 on my network.
[AT&T Samsung Galaxy S II SGH-I777] shoman94:
I'm gonna install battery stats on her phone tonight and see what comes of it.
[AT&T Samsung Galaxy S II SGH-I777] stalked_r/t:
You posted this in the Battery killer thread, but figured my question would be better fit here, as opposed to there.

Would this bug also cause BT to become dysfunctional for auto pairing? For instance, in my car, I have BT. Prior to upgrading to your 12/21 release, BT worked great. Post install, any time I get in my car, I have to start my vehicle, turn BT off, then turn it back on. Not really sure if this is tied to the above mentioned bug, or if this would be a ROM based issue as I'm still learning the connection between ROM and Kernel.
[AT&T Samsung Galaxy S II SGH-I777] rav4kar:
Just FYI. I have seen "Android OS" jump to top on Battery Graph when I use "TuneIn Radio", next comes is "Android System".
[AT&T Samsung Galaxy S II SGH-I777] Entropy512:
Did you change firmware too?

In general, anything related to the BCM4330 (wifi and bluetooth) seems wonky in UCKK6.

If TuneIn Radio uses background network data when the phone is trying to sleep, this would not surprise me.
[AT&T Samsung Galaxy S II SGH-I777] clumsywob:
So would it be a ROM thing? Or Firmware even? I wasn't sure where this would fall..
[AT&T Samsung Galaxy S II SGH-I777] Entropy512:
It might be the UCKK6 wifi drain bug, which is in the system firmware not the kernel.

(I'm joining Gary in his crusade against calling it a ROM - he's right, it's the wrong terminology for something in flash memory like this.)
[AT&T Samsung Galaxy S II SGH-I777] pistolberserk:
A very weird but minor problem just occurred. This morning when i checked my phone, all my apps were in different pages and just all screwed up. Instead of having 4 icons on the bottom tray of the home screen, there were only 3 (dolphin browser was missing) and all my apps in the application pages were all mismatched and just not in their original location. Also my pandora widget was removed from my 2nd home screen page.

I turned off phone and put it back on.. it booted up back to how i explained above, expect in the bottom left corner the words "Safe Mode" was on the screen.

So then i battery pulled and restarted the phone. The Safe Mode text was gone but my apps were still all messed up.

The only thing i did to my phone was change the pattern security lock to the pin security lock the night before.

I am running stock rooted and DD 1/2
[AT&T Samsung Galaxy S II SGH-I777] Entropy512:
95% chance that wasn't a kernel problem, but some weird effect of changing security settings. It probably broke device encryption and rendered some files or DBs inaccessible.
[AT&T Samsung Galaxy S II SGH-I777] vladm7:
Speaking of modems - I noticed people rave about XXKL1 modem over at i9100 forum. I know we lose buttons/sound with i9100 kernel, but curious what are the consequences of trying that modem on i777?
[AT&T Samsung Galaxy S II SGH-I777] stalked_r/t:
I have not done anything other than flash your 12/21 and put 2.2.1 UnNamed on. I've been out of the loop because of holidays/work travel for about the last month. is the general concensus that people are going back to 1.3 on UnNamed and an older Kernel of yours till these flaky bugs get worked out?
[AT&T Samsung Galaxy S II SGH-I777] arctia:
Entropy, i'm running unnamed 2.2.1 with your 1/2 kernel. I have noticed a somewhat high Android system also. For example right now, my display is at 20%, 2 hours screen on time. But Android system is at 39%. What can I do to help you troubleshoot?

Sent from my Galaxy SII
[AT&T Samsung Galaxy S II SGH-I777] Entropy512:
You lose call audio, I think data might break too. Modem doesn't affect wifi/BT on our devices anyway.

People experiencing wifi drain are going back to older Unnamed releases or other ROMs not based on UCKK6 - but I haven't seen anyone need to revert kernels. It's unreleased kernel patches or a change in my home environment (I only get significant drain when at home) that are causing my problems.

Dropbox LAN sync (broadcast packet once every 30 seconds from my desktop...) was one of my problems, but there's still more. I had drain around 2.5-3%/hour last night even after killing dropbox, the strange thing was that my deep sleep percentage was at 97%... Whatever I'm running into, this is a strange and tough one to track.

Not sure yet, I need to do more digging as to what sorts of things get lumped into Android System (as opposed to Android OS).
[AT&T Samsung Galaxy S II SGH-I777] shoman94:
I reverted back to 12/8 so far my battery life has increased quite a bit. So far my screen on time vs awake time are much closer together. But I'll have more info at the end of the day. Also auto brightness works much better.
[AT&T Samsung Galaxy S II SGH-I777] sweetboy02125:
Agree 12/8 I think the best one.
[AT&T Samsung Galaxy S II SGH-I777] rav4kar:
+1 sticking to 12/08 ( best battery + performance)
[AT&T Samsung Galaxy S II SGH-I777] :
12/08 did not like my phone. 1212 (thats 1/2/12 for Entropy :D ) is just down right awesome for my phone. Weird that our phones are "the same" yet are affected so differently.
[AT&T Samsung Galaxy S II SGH-I777] pistolberserk:
These were my awesome stats from the 12/1 DD

still had 13% battery left after those screen shots.

I would have posted my cpuspy stats but somehow the timer got reset.
[AT&T Samsung Galaxy S II SGH-I777] Entropy512:
Yup, my personal experience and the reports of most others in I9100-land indicate that 1/2/12 should be the best for battery, and it has given me the best weak-signal performance at my desk I have ever seen, also when I first released it, battery life was excellent at home.

It's only patches I'm running on my personal device that are NOT in the 1/2/12 release that are suspect at the moment... I'm going to be reverting tonight to test further and identify what in my home environment is not playing nice - I only see drain while at home, as I've said before, either something in my environment changed in the past two weeks or one of my unreleased patches are bad news.

Going to review the dmesgs of those with touchkey BL issues this weekend.
[AT&T Samsung Galaxy S II SGH-I777] mpkothari:
WOW!

HOLY COW!! That is insane! Granted your screen was only on for a little less than two hours and basically no usage, battery life like that is still beyond impressive. Did you have auto brightness on or lowest brightness level?
[AT&T Samsung Galaxy S II SGH-I777] axis01:
My system and OS are 21/17 respectively which are a bit higher than I noticed on previous DD"s, but my battery life is by far better than any of the others.

My reception is good as well. I even picked up a phone call in a King Air at 9.5k feet.
[AT&T Samsung Galaxy S II SGH-I777] rav4kar:
Are you kidding !? ;)
[AT&T Samsung Galaxy S II SGH-I777] dandrumheller:
Were you flying or a passenger? :-)
[AT&T Samsung Galaxy S II SGH-I777] IVIadness:
Either way it would be very rare to get signal that high up.. It's possible but would take some serious environment variables for it to happen. Kinda cool! The main problem is the speed they are moving at your cellphone keeps jumping tower to tower so signal would not be for long.

Max speed of a king air is like 315mph I imagine cruising speed would be lower but still at that speed you go 4 miles very quickly :)

Maximum distance of a cell tower is about 5 miles (if that, more like 3.8) , and they would have been about 1.5 miles up.

My guess is phone rang but he could not answer or talk unless it was a weird weather day and the signal was able to cloud hop.
[AT&T Samsung Galaxy S II SGH-I777] gr8hairy1:
On a flight from florida to michigan I had google maps going. Couldn't get any signal for gps. But it gave me a rough location from a cell tower near savannah, georgia. Had cell signal for all of 5 secs.

Yeah kinda lame compared to actually receiving a call.

Sent from my páhhōniē
[AT&T Samsung Galaxy S II SGH-I777] Entropy512:
Range of a cell tower with perfect line of sight is MUCH longer than on the ground, which is why the FCC bans cell phone usage in the air.

There are a bunch of FAA regulations regarding electronic devices and transmitters in aircraft, that are basically, "it's OK if allowed by the pilot and pilot accepts liability" at least for private flights. (Passenger flights may have additional rules, but most of the rules are simply the airline not wanting to have any liability risk in the case something DOES interfere, even though interference is not likely from most devices.)

The cell phone ban, however, is an FCC rule, because airborne mobile devices screw up the frequency reuse planning that cell towers depend on for capacity planning. The cell network is designed such that only one tower on a given frequency can communicate with a handset at a given location - an airborne handset screws this up.

Things get extra complicated by the fact that most cell towers have antennas angled slightly downward - power that goes into the sky is considered wasted.

(As to my background - RF engineer first, software guy/kernel hacker waaay after that.)
[AT&T Samsung Galaxy S II SGH-I777] garyd9:
N2YPH? de K3WOW
[AT&T Samsung Galaxy S II SGH-I777] sstarre:
CQ de WB1GKS
[AT&T Samsung Galaxy S II SGH-I777] Entropy512:
Stalker. :P

de N2YPH. :)
[AT&T Samsung Galaxy S II SGH-I777] prince_niceguy:
here is something interesting I have found so far. Entropy kernel with conservative and Siyah kernel same settings.

Entroy kernel - Android OS takes around 1 hrs 30 minutes and display some 1 hrs on. Battery 50% remaining.

Siyah kernel 2.6.7 - Android OS takes around 12 minutes and display some 2hrs 30 minutes on. Battery 50% remaining.

Nothing against entropy kernel, but something is reporting wronging as Android OS may be. Any idea what is going on?
[AT&T Samsung Galaxy S II SGH-I777] mcnutty:
And how exactly did you perform this test? Battery life can vary widely by cell tower connections, cpu workload, non-kernel wake locks, etc. Not saying one is better than another, but I would like to see more data presented with the comparisons. Entropy is an amazing dev, and posts like this can be very delaying rather than helpful.

Edit: Also, the scheduler has been tweaked differently between the two kernels, and Siyah highly favors battery over performance here.

Sent from my SGH-I897
[AT&T Samsung Galaxy S II SGH-I777] Entropy512:
As far as Android OS - If you were running the standard release, that's not surprising, as Siyah is based on 2.6.35.14 like my Experimental series, and it is known that one of the patches in 2.6.35.12 hides a large portion of Android OS usage so that it doesn't show in battery stats at all. (But the time spent servicing IRQs is still eating your battery.)

Considering the MAJOR differences in screen-on time between your reports, there are too many uncontrolled variables for it to be of any use whatsoever. Who knows what else your device was doing.

I have two particular semi-controlled test cases:

1) Performance at my desk at work - This is brutal on battery because of how weak my signal is. Syncs take longer, the radio uses much more power. 1/2/12 has improved things in this situation.

2) Performance on wifi when sitting overnight at home - 1/2/12 may have a regression here compared to older releases. Trying to find just what caused it (Originally I thought it was unreleased patches) is taking some time. It's a nasty one, as I am not seeing any impacts to deep sleep percentages or anything like that, I'm starting to suspect that some device isn't being shut off properly in deep sleep. I'm suspecting something wifi-related, since it doesn't seem to happen at work. I'm trying 12/08/11 tonight, tomorrow night is 1/2/12 with wifi off.

I'm starting to really think I need to build a dummy battery so I can log current usage. I might be able to run A/B tests of various tweaks in only an hour or two instead of having to wait overnight for a decent drain estimate.
[AT&T Samsung Galaxy S II SGH-I777] hlb3:
Had my first issue with Android OS going crazy, my phone had like 45% battery when it I set it down, like 4 hours later I heard a sound, went and looked and it was the low battery notification and my phone was at 10%, looked at the battery use and Android OS had jumped up to 51%, looked in CPU spy and 800mhz and 200mhz had jumped up. I looked in BBS, nothing was really jumping out, looked in the kernel wakelocks and SVNET had had kept the phone awake for over 3 hours.
[AT&T Samsung Galaxy S II SGH-I777] axis01:
Nope, dead serious.

I work for a medical tranport service, so I was a passenger in a KA 200. I wouldn't have even noticed but my boss called me to make sure I took the new sat phone we're trying out with me to see how it works at altitude. I was giving him **** about how the sat phone wouldn't work but my GSII worked just fine while flying. He thought I was still on the ground so he must have heard me without a problem. I looked up in the cockpit and noted the altimeter scrolling past 9k. I lost him at 9.8k ft. :D We did have a short conversation and he was cutting out a little bit. This is not the norm as i've "heard" that text messages are touch and go at 3-5k ft, which is the usual cruising altitude in our helicopters. I've never tried to make a phone call while in flight as it's a FCC violation as Entropy stated. I am guilty of NEVER turning off my phone in flight though.
[AT&T Samsung Galaxy S II SGH-I777] prince_niceguy:
Is there a way to provide more data on this t you or other devs. I am sure in both cases the usage was more or less the same and i was home almost all the time using both the kernels with same wifi router connected. I am using standard release and not the experimental version.

I would try to empty battery on siyah take a screen shot of the battery usage and then use entroyp kernel and try to drain down battery again from full charge. I am not sure what it would provide though :-).

Is there a way to track interrupts etc to see if they are counted in stats or not?
[AT&T Samsung Galaxy S II SGH-I777] daverup:
Here is another view, and a few more facts.

The aircraft guidance on an instrument approach in low visibility or low ceilings is most often via ILS approach.

The ILS approach is old technology, vhf radio navigation. Two antennas at the landing airport provide signals for vertical and horizontal tracking within about 20 miles of the airport.

The ILS antennas on many airplanes are mounted in the tail.

Now, picture a bad weather day. Tiny little electromagnetic waves are being used by the pilots to guide the airplane to a safe landing. Just an airplane taxing in front of the ground antennas will affect the signal provided to airplanes still on the approach, so "safe" zones are maintained on runways and taxiways during bad weather.

Now, try that with 100 or so cellular radios transmitting and receiving "important" cell data 50 feet in front of the aircraft antennas.

No real data has been gathered on the effects of all this.

Have a nice flight.

Sorry for the Off Topic post, but I had to say something.
[AT&T Samsung Galaxy S II SGH-I777] Entropy512:
Yup, as I said - the FAA regulations allow usage of electronics (even transmitters) at the pilot's discretion. However, on a commercial flight, the pilot (and in general, airline policy) dictates that EVERYTHING is off during takeoff and landing because ILS is so easy to confuse and it's so damn difficult to track down every possible interference source on a commercial flight's cabin.

Things that are OK on a small private fixed-wing or helo flight (like the post that started this) because the pilot knows exactly what is turned on and can turn it off are NOT OK on a commercial airline flight.

Don't just put it in airplane mode - turn it OFF especially on landing approach - some of the bus frequencies of your device are VERY close to the ILS frequencies.
[AT&T Samsung Galaxy S II SGH-I777] dandrumheller:
This, please folks. not to turn this into a flight safety thread, but 12 inches of snow on the ground in front of an ILS glide slope antenna can cause problems (yes the airports plow the grass in front of the antennas). They are pretty sensitive, and old technology. Please turn stuff off on commercial flights...
[AT&T Samsung Galaxy S II SGH-I777] IVIadness:
I thought mythbusters tested this and saw no interference that could mess things up from cell phones.
[AT&T Samsung Galaxy S II SGH-I777] dandrumheller:
Much as I like mythbusters, I'd rather not risk my our others lives on the pseudo science of a couple of special effects guys...just sayin...
[AT&T Samsung Galaxy S II SGH-I777] rav4kar:
DD 12/08/11 is still rock solid!! I ran a simple test last night and the results are below.

1. The phone was on WiFi for about 8 hours (10pm to 6am )after full charge, battery drained from 100% to 96% when I checked in the morning.

* battery drain was 0.5% / hour

2. I reset the timers in CPU to check Deep sleep

* Deep sleep was 97%

3. I have 1 Gmail, 2 yahoo, 1 hotmail , 1 MS Exchsnge email sync, one daily alarm.

4. I made sure there was no app or anything running in background during this through this 8 hours window.

No wonder why those with UnNamed v2.2.1 and Entropy's DD 12/08/11 never complained about battery or performance !!! ;)
[AT&T Samsung Galaxy S II SGH-I777] IVIadness:
Fair enough :)
[AT&T Samsung Galaxy S II SGH-I777] Entropy512:
Would need more details of the test - Did they specifically test ILS interoperability? If they just did tests at altitude, that's pretty meaningless. Most instrumentation is more interference-robust than ILS is.

Plus, just because one cell phone didn't interfere with ILS doesn't mean another wouldn't - I would be more concerned about LO leakage and CPU clock leakage than the fundamental transmit frequencies of the device.
[AT&T Samsung Galaxy S II SGH-I777] garyd9:
In theory, harmonics from internal CPU clock...

Well, realistically, it's a slim chance of any RFI impacting cockpit intruments or the exterior antennas from CPU clock leakage in the sardine compartment of a commercial airliner. Then again, even a slim chance might be too much of a chance. Why risk it?

In other news, Jan02 is still running great for me. I haven't seen any issues whatsoever (related to the kernel.)

Take care

Gary
[AT&T Samsung Galaxy S II SGH-I777] axis01:
Sorry if I turned this into a public safety announcement/mythbusters tale. This was a freak thing and thought it was pretty cool that I got reception at 9k+ft. I don't encourage anyone to try this, just thought it was pretty cool, especially right after I updated to 010212.
[AT&T Samsung Galaxy S II SGH-I777] IVIadness:
Whoops yeah sorry entropy, back on target newest experimental is working amazing!!
[AT&T Samsung Galaxy S II SGH-I777] Entropy512:
Hmm... I wonder if I was just lucky that whatever environmental cause of drain went away when I back-flashed to 12/08...

I saw a bunch of NetBIOS UDP broadcast activity on my last Shark capture, I'm wondering if the root cause goes to something as strangely indirect as mythtvfs + Samba...