yashsingh1/xdaforums huggingface dataset:
[Galaxy Tab 2 7" Android Development] Android-Andi:
Yes.

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[Galaxy Tab 2 7" Android Development] lepa71:
Do we need to install this kernel on the top of Slimkat Stable 6? Thanks
[Galaxy Tab 2 7" Android Development] Android-Andi:
Read the op and previous posts... Lol...

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[Galaxy Tab 2 7" Android Development] dweller417:
My battery stat using this kernel.
[Galaxy Tab 2 7" Android Development] zeetherocker:
Just... Haven't been following the forums lately coz of exams

Anyway just a small doubt ! [MENTION=5153662]Android-Andi[/MENTION] is the battery drain problem already fixed with slim kernel sources ?

If yes then can't we just fork it and make some changes with the config file and use for cm and others and see how it works ?

But anyways trying the kernel now !!
[Galaxy Tab 2 7" Android Development] Android-Andi:
[MENTION=4457320]zeetherocker[/MENTION] i modified cm 10.2 kernel for slim. It needs the previous blobs.

There is no DM for CM for us, also CM will not fork/pull a new kernel. We nedd to fix it.

Give me some more time, i am hard working on it.

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[Galaxy Tab 2 7" Android Development] zeetherocker:
[MENTION=5153662]Android-Andi[/MENTION]

I can see that :) you are doing a great job.. keep it up!! Testing this kernel right now!!

And I need to learn some more about kernel side of development !!

Will try to help after learning a thing or two :p
[Galaxy Tab 2 7" Android Development] Stanislaus:
Wow. I'm using the stock kernel and I could only get 3hr out of it. Flashing this kernel now
[Galaxy Tab 2 7" Android Development] Android-Andi:
New kernel uploaded

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[Galaxy Tab 2 7" Android Development] otavioricciotti:
Changelog?
[Galaxy Tab 2 7" Android Development] Bhaskara Rao:
Downloaded. Shall report usage tomorrow. Thanks for the update!
[Galaxy Tab 2 7" Android Development] iSagar7:
Hey andi, i flashed 1.1 yesterday and i kept it overnight on flight mode with greenify and there was 4% drain.. That means battery drain is still there..
[Galaxy Tab 2 7" Android Development] openmatrix:
F2fs support?
[Galaxy Tab 2 7" Android Development] Android-Andi:
No f2fs and i will not include it, read the OP again to understand why i am working on this kernel.

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[Galaxy Tab 2 7" Android Development] Bhaskara Rao:
There is definite improvement in battery life in v1.2. Here are the screenshots:
[Galaxy Tab 2 7" Android Development] josfr4ncisco:
Just flashed AA-ANYKERNEL v1.2, I will give you feedback asap! :D
[Galaxy Tab 2 7" Android Development] josfr4ncisco:
Screenshots attached, battery life is overally better!
[Galaxy Tab 2 7" Android Development] Android-Andi:
Give me some time now.... Need to check my 5600 lines diff :D

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[Galaxy Tab 2 7" Android Development] Android-Andi:
Lol... The diff is bigger, looked wrong :D over 500000 lines, ~130000 left for now.. After that the real work begins :p

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[Galaxy Tab 2 7" Android Development] KlinkOnE:
May I ask what is being diffed? And for what purpose?

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[Galaxy Tab 2 7" Android Development] Android-Andi:
Read the OP.

We need to fix CM kernel, mostly happens on p51xx but some p31xx user also faced massive batterydrain-stock cm kernel unusable for them.

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[Galaxy Tab 2 7" Android Development] KlinkOnE:
I followed the thread regularly and do indeed know what is the main purpose. My question is what is being diffed against what because you missed that information in your post. Just for understanding and maybe learn some. And yes I never had battery-drain running either cm or agni on my p3110.
[Galaxy Tab 2 7" Android Development] Android-Andi:
ATM cleaning source, removeing whitespaces and whitelines.... Thousends :p after that i take a look on other changes

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[Galaxy Tab 2 7" Android Development] josfr4ncisco:
Took this screenshot after u finished playing my game. I would get a 20%/h rate, but it got lower! :thumbup:
[Galaxy Tab 2 7" Android Development] josfr4ncisco:
Here's another set of stats. As expected, 'Injustice: Gods Among Us' eats a lot of battery, lol
[Galaxy Tab 2 7" Android Development] Skazzy3:
need this badly for f2fs and blackhawk support,
[Galaxy Tab 2 7" Android Development] dweller417:
My stats using 1.2
[Galaxy Tab 2 7" Android Development] josfr4ncisco:
My battery went from 100% to 90% in 10 minutes, something is pretty much not right here.

(While I texted this, it went down to 87%)
[Galaxy Tab 2 7" Android Development] josfr4ncisco:
It's down to 80% in 20 minutes. Why is the voltage so low?
[Galaxy Tab 2 7" Android Development] Android-Andi:
I am Working on it. Give me some more time, maybe an update later or on sunday. Just testing some stuff.

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[Galaxy Tab 2 7" Android Development] Android-Andi:
Hey together!

I just uploaded a new Kernel for SlimKat and one for CM 11.

It's a patched SlimKat Kernel.

Notes about the Process:

I went back to 3.0.31 kernel and applyed JB Update 1 in 3 parts instead 1 for better changes tracking.

I did the upstream from 3.0.31 to 3.0.101 again and added back all other changes wich got applyed on our SlimKat 3.0.101 kernel before (e.g. BoefflaSound).

After that i reverted some changes from JB Update1 and applyed some conflicting upstream-changes back.
[Galaxy Tab 2 7" Android Development] iamashwin:
and so what is your conclusion?
[Galaxy Tab 2 7" Android Development] Bhaskara Rao:
Not able to download. I am not able to connect to download link either on my PC or on my Tab, though I observe others are able to download as the number of downloads is increasing since morning. Can anyone suggest me a way out. I am experiencing similar problem when I try to downoad Dhollmen Kernel.
[Galaxy Tab 2 7" Android Development] Android-Andi:
Will upload somewhere else later

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[Galaxy Tab 2 7" Android Development] Bhaskara Rao:
No hurry! Do it at your convenience. Thanks a lot.
[Galaxy Tab 2 7" Android Development] Android-Andi:
Mirrored on my Androidfilehost: http://www.androidfilehost.com/?w=files&flid=16667
[Galaxy Tab 2 7" Android Development] :
keyboard is broken.. did not show up :angel:
[Galaxy Tab 2 7" Android Development] Android-Andi:
OmniRom? If yes, known issue :p can build for Omni again.
[Galaxy Tab 2 7" Android Development] :
lol.. yes, absolutely right :silly:
[Galaxy Tab 2 7" Android Development] Bhaskara Rao:
Thanks a lot for mirroring as well as providing a slim kernel. Just downloaded slim test 1 and will be flashing right now.

---------- Post added at 07:31 PM ---------- Previous post was at 07:09 PM ----------

Installed smoothly. Smooth and faster. No issues during the last 15 minutes. I shall report battery usage tomorrow.
[Galaxy Tab 2 7" Android Development] Android-Andi:
:D will be ready in ~ 5 hours
[Galaxy Tab 2 7" Android Development] jopsinas:
The sound is barely hearable in headphones unitl I downloaded boeffla sound app and enabled DAC direct.

With the app the sound is brilliant.

CM11 with Anykernel test1
[Galaxy Tab 2 7" Android Development] Android-Andi:
Ready for download on my androidfilehost
[Galaxy Tab 2 7" Android Development] :
Will come with reports next day :good:
[Galaxy Tab 2 7" Android Development] Android-Andi:
Uploaded a 2nd Test-Kernel for SlimKat.

This time i seperated the blobs.

Thanks [MENTION=4021423]ketut.kumajaya[/MENTION] for his proprietary-vendor.zip - i changed 2 lines to make it work for this kernel also.

I uploaded also a 2nd Test-Kernel for CM 11.

Also uploaded a new OmniROM kernel (reuploaded)

Download kernel and vendor-blob here: http://www.androidfilehost.com/?w=files&flid=16667

Please flash the vendor-blobs DIRECTLY after flashing tes2-kernel!
[Galaxy Tab 2 7" Android Development] vickyg.coolest:
tested your 1 test version of slimkat kernel

no bugs so far

now i will flash test kernel 2

will reply soon

thanks for your support!!
[Galaxy Tab 2 7" Android Development] Bhaskara Rao:
Thank you, Andi! Installed slim test 2 and vendor blobs. Installation was smooth and no issues so far. Shall report on battery usage.
[Galaxy Tab 2 7" Android Development] Bhaskara Rao:
After using for over an hour, I personally feel my Slimkat 6.4 is smoother on test 2 kernel compared to stock, Agni v4.1 R2 or Dhollmen Kernel. May be I am subjective. So far battery usage is also very good. Shall report after a day's use. Andi, you are doing stupendous work. Lots of thanks to [MENTION=5153662]Android-Andi[/MENTION], [MENTION=4365701]psndna88[/MENTION], [MENTION=4021423]ketut.kumajaya[/MENTION] for this daunting project.
[Galaxy Tab 2 7" Android Development] :
I have done the test, took quite long because i test AA and Agni with several test.

First test is to measure a differences between using mobile data and WIFI while idle (not using the tab, screen still on) and using it by browsing the web (stock browser).

Second test is to measure a battery drain in airplane mode while screen always on at lowest brightness.

The general rules i made is battery start from 100% to easier detect the battery drain and screen always on while manual brightness at the lowest to prevent differences battery drain by brightness. Also there is no app running if i'm not mentioned it.

AA kernel test results (test1 version):

Airplane mode (idle) takes -1%/10min 30sec

Mobile data (idle) takes -1%/10min 30sec

WIFI (idle, only when plugged in setting) takes -1%/10min 30sec

Mobile data (browsing with stock browser) takes -1%/7min 30sec

WIFI (browsing with stock browser)) takes -1%/7min 30sec

Errors results rate is about 30sec.

The results might be different in different devices cause by battery aging. Sleep state mode test haven't done yet. Seems i can't do it because it takes too long to measure :D

Screenshoot is ready, but it's too many.. if anyone intersted about it, i can zip it and upload later.

for comparison you can look agni thread. I'll try the test 2 with same method [MENTION=5153662]Android-Andi[/MENTION] ;)
[Galaxy Tab 2 7" Android Development] Bhaskara Rao:
I think battery life is very good. Discharged to 28% in over 22 hours with screen on for 4 hours, audio playback of 2.5 hours and video streaming for 25 minutes (101MB)
[Galaxy Tab 2 7" Android Development] :
test2 version:

Mobile data (idle) takes -1%/10min

Mobile data (browsing with stock browser) takes -1%/8min

WIFI (browsing with stock browser)) takes -1%/9min 15sec

errors results rate about ± 30sec

idle test reduced because i believe the results are about the same..

definetely an improvement :good:
[Galaxy Tab 2 7" Android Development] jrc2:
If LiquidSmooth uses Slim kernel, will there be any improvement in battery life with this kernel?

Edit: I was asking because I saw something in this thread that it is a modified slimkat kernel.

Sent from my SGH-T989
[Galaxy Tab 2 7" Android Development] Android-Andi:
Clean flashed SlimKat. No Gapps. Using test2 kernel for slim.

WiFi turned on. Setup alarmclock to wake me up in the morning.

Turned off my screen and checked after 7 hours sleep: still 100%.
[Galaxy Tab 2 7" Android Development] lokesh.3440:
Andi do I need to flash the vendor blobs after flashing slims kernel test2 in some ROM other than slimkat ? If yes, can you share any other link to download vendor blobs because android file host in not working at all.

Edit: androidfilehost worked somehow,,,but i would like to report it doesn't work with aospa,,I got system ui stopped fcs and got stucked in lock screen. Which kernel should I use cm kernel or slimkat. I tried with blobs as well as without blobs
[Galaxy Tab 2 7" Android Development] iSagar7:
As far as i know, AOSP uses the cm based kernel and i personally am using v1.2 of Andi's kernel with AOSP and everything is working super smooth so i don't even feel to update.. So you should go with CM..
[Galaxy Tab 2 7" Android Development] lokesh.3440:
[MENTION=4642160]iSagar7[/MENTION] How is the battery backup ,I m specifically concerned with screen on time,,because I was getting around 4 hours with default aospa kernel
[Galaxy Tab 2 7" Android Development] Quantumrabbit:
I've been using SlimKat Test 1 for a few days... it only loses a few percent overnight instead of 20+% like on built in. I've noticed no performance hit either... this is great.
[Galaxy Tab 2 7" Android Development] Skazzy3:
Getting better. But this is nowhere near what I used to get back with 4.2.2 (I didn't have my tab through the 4.3 phase) where I got to 48 at the end of the day after almost 6-8 hours of screen time watching YouTube HD
[Galaxy Tab 2 7" Android Development] Bhaskara Rao:
The best battery life I got so far during the last 6 months. I am on Slimkat weekly 6.4 with test 2 AA-ANYKERNEL. Thanks to Android-Andi and others.
[Galaxy Tab 2 7" Android Development] iSagar7:
Hey lokesh here is the amazing stats of [MENTION=5153662]Android-Andi[/MENTION] 's stupendous kernel.. Attached below are images.. Thank you andi.. I am using aosp 8th june with aa kernel v1.2.. :)

Now its 4% and screen on time is nearly 6hrs.. Amazing work.,
[Galaxy Tab 2 7" Android Development] mymeatb18:
So with cm11 do I use the slimkat test 2 with vendor blobs zip?
[Galaxy Tab 2 7" Android Development] Android-Andi:
No. You can try cm test1 or wait until later this evening. Will upload test2 for cm later... Somehow missed that before :p
[Galaxy Tab 2 7" Android Development] Android-Andi:
Sorry for the delay. Reworked the OP and Downloadsection (2nd Post).

CM Test2 Kernel now also available, uploaded P51XX kernel last time instead :p lol... no one reported it :D

Plese test and tell if you got some new Problems, also if Battry now better then on Stock CM 11 Kernel or not.
[Galaxy Tab 2 7" Android Development] jrc2:
I flashed the slim test2 on LiquidSmooth since it was using slim kernel. I haven't really noticed any better battery life when I am using the tablet a lot, but I as able to leave the tablet in with WiFi on last night and only lost 2% instead of 7-10% so deep sleep is better. It did fix the bug where YouTube and some other videos wouldn't play, so that is a plus.

Sent from my SGH-T989
[Galaxy Tab 2 7" Android Development] dweller417:
Using slim test 2. Here is my battery stats.
[Galaxy Tab 2 7" Android Development] dlabadie:
Using test 2 on Slim 6.6. Very responsive and great battery life.
[Galaxy Tab 2 7" Android Development] otavioricciotti:
Why do I have to flash vendor blobs? I'm not having issues with Carbon ROM and CM3.0.101-test2.

The battery is awesome, by the way. Battery and performance are much better in Carbon ROM than any other ROM [AA kernel with Linaro 4.9.1 instead of 4.7 would be perfect now].
[Galaxy Tab 2 7" Android Development] lokesh.3440:
[MENTION=5153662]Android-Andi[/MENTION].. Cm-3.0.101-Test2 is really awesome... Smoother experience with PA and My Screen-on time has increased to 1 hour/30 minutes. It was earlier 4 hours;Now i am getting around 5 hours 30 minutes on a full charge. Thanks for the kernel and keep this spirit going. :) :) :)
[Galaxy Tab 2 7" Android Development] Android-Andi:
Thanks for all the feedback.

Now lets make it happen official:

Please check CM 11, OmniRom and SlimKat thread for latest unofficial builds.

I need to confirm my patches working without issues to get the changes merged :)

My part done, now it is up to You (all user) if we can get the changes merged!

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[Galaxy Tab 2 7" Android Development] iSagar7:
Do we need to flash the vendor blobs for aosp?

i am presently on v1.2 but want to try test2..

:confused:
[Galaxy Tab 2 7" Android Development] lokesh.3440:
Yes you need to flash blobs otherwise video,audio,wifi,camera drivers will have some issues as [MENTION=5153662]Android-Andi[/MENTION] has separated the kernel part and blobs into individual zips. Please follow my flashing steps carefully :

1) reflash PA

2) reflash gapps

3) flash kernel

4) flash blobs

5) wipe cache/dalvik cache and you are ready to go.

:laugh::laugh::laugh:
[Galaxy Tab 2 7" Android Development] motisu:
Is there any chance that these fixes will get into a kernel which has f2fs support?
[Galaxy Tab 2 7" Android Development] Android-Andi:
No. This won't get a custom kernel. Will close this thread after testing / enough feedback on the Roms.

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[Galaxy Tab 2 7" Android Development] Pepousek67:
AOKP

Tested on AOKP rom - OK

GT-P3110-CM-3.0.101-test2
[Galaxy Tab 2 7" Android Development] sanefirst:
Hi. I have the same problem with battery in latest CM and latest Omni. It doesn't matter whether I use stock kernel or kennel from this thread (I tried latest Omni Test2). The problem is: the battery is charged to 100%, then it quickly goes down to almost 0 and it returns to high level itself (meaning - no charger connected). You can see it in the chat below:
[Galaxy Tab 2 7" Android Development] iSagar7:
Clear your battery stats and switch off the tablet and charge..
[Galaxy Tab 2 7" Android Development] sanefirst:
Thanks for the tip. It doesnt work.
[Galaxy Tab 2 7" Android Development] Android-Andi:
Complete discharge it, then recharge.

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[Galaxy Tab 2 7" Android Development] otavioricciotti:
Last update was on 27/07, but is still "test2"?
[Galaxy Tab 2 7" Android Development] Android-Andi:
Only updated OP, not the kernel

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[Galaxy Tab 2 7" Android Development] Skazzy3:
Why don't you include vendor blobs WITH the kernel? Ketut only did it since she wanted to be able to attach it. You keep it externally. I don't see why it would cause legal issues so I don't see any real reason why YOU should as well.
[Galaxy Tab 2 7" Android Development] Android-Andi:
There is no real reason, but they also work for other kernel, ketut's ZIP only works for NEXT.

But there is no need. This thread will get dead & closed soon. All commits in review on different Gerrit.

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[Galaxy Tab 2 7" Android Development] sanefirst:
Hi Andi. Sorry, but this solution also doesn't seem to be working :(
[Galaxy Tab 2 7" Android Development] :
complete discharge > charge until full > clear battery stats, use this.

if it's still doesn't working, it must be hardware fault..

i've experienced your issues, and fixed it by those method.
[Galaxy Tab 2 7" Android Development] sanefirst:
I'll try.

It cannot be hardware fault as I don't encounter such problems i.e. in Cody's 4.4.2.
[Galaxy Tab 2 7" Android Development] Skazzy3:
You know what? I found that undervolting the CPU actually makes the battery life much worse. All the problems I was posting about are gone and I can end the day at 50 or 40%. And sorry like I said I've missed over a year of gtab2 development so if someone actually said not to do that before I'm sorry.
[Galaxy Tab 2 7" Android Development] Android-Andi:
Thanks a lot!

I'll upload "Vendor-Blobs-update1.zip" to my androidfilehost.
[Galaxy Tab 2 7" Android Development] Android-Andi:
Please together,

test the Test 2 kernel for omni and cm.

Flash the updated blobs directly after that.

I am not sure, how long i'll stay here and support the Tab 2 - maybe i'll drop support soon as i am really k.o. from supporting to much devices and roms.

It would be great, if we can fix this problem together before i'll leave - else all the hours and days i spend in this commits have been for the a$$.
[Galaxy Tab 2 7" Android Development] stingjoel:
[MENTION=5153662]Android-Andi[/MENTION], will you drop support slimkat for tab 2 too? Very bad news then ? ?
[Galaxy Tab 2 7" Android Development] Android-Andi:
I will drop whole tab2 sometimes.

No feedback = sooner

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Edit:

That is why most devs stopped and droped support.
[Galaxy Tab 2 7" Android Development] Android-Andi:
[MENTION=2478576]Tsjoklat[/MENTION] i wonder, if this causes the drain or other problems as a side effect https://github.com/TheMuppets/propr...mmit/d091651a5f3dbcf315ec5d8a3fe995246ee6284b
[Galaxy Tab 2 7" Android Development] :
What kind of feedback do you wish? So people would understand ;)

As an user, sometimes i confused too about the feedback :laugh:
[Galaxy Tab 2 7" Android Development] Android-Andi:
Test if it works.

Battery getting better or not?

Any new problems?

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[Galaxy Tab 2 7" Android Development] :
That will give people an understanding

i'll report soon :)
[Galaxy Tab 2 7" Android Development] vickyg.coolest:
Downloading blobs and test 2 zip

Will report soon

Thanks for your awesome work for tab 2
[Galaxy Tab 2 7" Android Development] Tsjoklat:
Hm.. was screen recording the only issue with the newer blobs? Maybe we should try the new ones again.

Edit: BTW, Im not having any problems with battery drain using the latest test2 kernel. It seems pretty good to me. Is there a reason why all your good work with updating the kernel source has not been merged yet to cm?

Edit2: I hope we can get all this stuff merged before the nexus 9 is released :)
[Galaxy Tab 2 7" Android Development] Android-Andi:
[MENTION=2478576]Tsjoklat[/MENTION] only issue i know. There haven't been other issues if i am not wrong.

CM don't like the upstream from 3.0.31 to 3.0.101.... thats the problem.

Maybe i need to rework my commits without upstream :(

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[Galaxy Tab 2 7" Android Development] Tsjoklat:
Yes, submitting code without introducing any new features would probably be more accepted. Your code changes alone would be more specific to our device and easier to test.
[Galaxy Tab 2 7" Android Development] Android-Andi:
But some parts depend on the upstream :P

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[Galaxy Tab 2 7" Android Development] Tsjoklat:
I would still include any new dependencies from upstream that are required by the code updates and document the reason why. Not everything new from upstream should be needed
[Galaxy Tab 2 7" Android Development] Android-Andi:
I will work on it, but maybe there is a better way, i have seen on sammobile.com samsung released more 4.2.2 updates until July! That means: our kernel-source meight be outdated.

We can fix some bugs like poor battery life and maybe some more, but only with your help - the XDA-Community!

These bugs are caused by OS kernel which is not up-to-date with stock ROM’s and Samsung is refusing to update it. Our previous requests have been ignored by them, and the point is that Samsung have to update it, they are just forced by law and licensing terms of Linux, however they just don’t want to do this because of some unknown reason.

I think that the only way to get an updated source code is to… Show the power of our community and spam them with request messages. That’s the only way to fix Tab 2 bugs wich are still present.

S3 mini and Ace 2 community have done this before with a great success, so we can do this too! It only took 2 or 3 days until Samsung updated the S3 mini kernel source!

It’s a nasty way, but it’s the only thing we can do as a community, because previous requests have been ignored.

I'd be very pleased if you want to help. It’s easy, just send them the message provided below:

Contact form: http://opensource.samsung.com/reception/receptionSub.do?method=inquiryView

Inquiry type: Request for Source Codes

Sample message:
[Galaxy Tab 2 7" Android Development] Android-Andi:
[MENTION=2478576]Tsjoklat[/MENTION] can we talk on PM or hangouts about something different we meight be able to test?
[Galaxy Tab 2 7" Android Development] Tsjoklat:
Sure, just send me a PM. I'll be available in a few hours.
[Galaxy Tab 2 7" Android Development] Android-Andi:
Can not send pm to you :D you blocked pm

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