yashsingh1/xdaforums huggingface dataset:
[Galaxy Tab 8.9 SGH-i957 Android Development] modestone:
Mine seems to run quite happily at 1.89.
[Galaxy Tab 8.9 SGH-i957 Android Development] Croak:
It's going to vary from chip to chip, and temps play a big role as well.
[Galaxy Tab 8.9 SGH-i957 Android Development] orlandoxpolice:
Used nofrills to change the scheduler and all is well.
[Galaxy Tab 8.9 SGH-i957 Android Development] quasitime:
What did you set the scheduler to - noop?
[Galaxy Tab 8.9 SGH-i957 Android Development] modestone:
I don't think this is all quite correct, let me explain.

I bought a 2 amp usb/ac device, plug it into my tablet, and of course the tablet shows its little "non charging" icon.

Well, if the system is just putting that graphic there regardless of its charging state, I would expect it to charge at the same rate as my stock samsung charger (also 2 amps).

It does not, in-fact it seems to "charge" at the same rate as plugging it into a 500ma computer port, aka hardly at all.

So it seems to me the software is quite literally limiting the charge rate its self.

Really annoying, my new usb/ac plug has all the power it needs, it just wont suck it up.

So is there any way to fix this in software, or do I need to mod my new 2 amp charger?

Is it just the two data pins in the usb that are being shorted?
[Galaxy Tab 8.9 SGH-i957 Android Development] Croak:
Everything I said was correct.
[Galaxy Tab 8.9 SGH-i957 Android Development] orlandoxpolice:
Can't remember. I'll check when I get home.

I can even go to higher speeds now.
[Galaxy Tab 8.9 SGH-i957 Android Development] modestone:
Ok then care to elaborate why an identical rated power supply would not charge at the same rate?

Something is OBVIOUSLY not correct, because to me your post claims that regardless of the icon that shows up, the tablet is taking in the maximum rate of power/ charge that it can be given by the supply.

That is absolutely NOT correct.

Either I am reading something wrong in your post, or you are wrong.

Care to explain, or just want to claim your right?

Anyways, I am sure its when the tablet gets kicked into MTP mode, it kicks down its power draw to 500ma, since if it thinks its connecting to an MTP source, it thinks its connecting to a computer.

My third party 2A usb charger, when plugged in, engages MTP mode on the tablet, and I am fairly certain that is engaging low power draw mode.

The USB spec negotiates power requirements upon initializing as well as all the other things it does, and it sounds like the stock chargers are shorting the data lines so no communication passes, which the tablet interprets as "go ahead and pull full power".

500ma is the max power draw in the USB spec, although some computers have the ability to put out a full amp, not many though.

I have a Toshiba Qosmio that has "high power" usb ports that provide 1 amp.

Pretty sure the bottom line here is when USB MTP is recognized by the tablet, it tells its charging circuitry in the tablet itself, to use the USB spec of 500ma maximum draw.

BTW I work in the ISP industry, and deal with power systems, charging systems, and battery backup / un-interprutable supplies daily.

Hell I am half tempted to cut apart a cable and hook my Fluke meter to it and SHOW you that it is infact drawing no where near 2 amps when the tablet detects MTP mode.
[Galaxy Tab 8.9 SGH-i957 Android Development] Croak:
Blow it out your ass.

You guys are on your own, I don't need this ****.
[Galaxy Tab 8.9 SGH-i957 Android Development] modestone:
Wow, informative as ever croak, you Canadians really are friendly!

Someone having a bad day?

Anyways, if someone DOES want to contribute to the knowledge pool, add constructively to the discussion at hand, and not throw a tantrum when someone brings new info to the table that may not jive with what you thought was right, I would love to get to the bottom of this.

I think if you look back over my original post, you will see I was not attacking you, or claiming you were out right wrong, I was simply contributing what I have found to the discussion.

At this point I think you have been kinda rude for no apparent reason.
[Galaxy Tab 8.9 SGH-i957 Android Development] orlandoxpolice:
everyone take a step back and a deep breath and chill out.

and to who asked, yea i set it to noop.
[Galaxy Tab 8.9 SGH-i957 Android Development] quasitime:
Cool. Much appreciated.
[Galaxy Tab 8.9 SGH-i957 Android Development] modestone:
Good advice, aaahhhh feels good.
[Galaxy Tab 8.9 SGH-i957 Android Development] modestone:
So just doing some google searching and a little reading, some testing, and yea, 2 amps available or not it doesn't matter, the tab absolutely will not charge at the full rate unless the tab gives it the go ahead, whether that's because the pins or shorted, or if it can be done in software doesn't really matter, the device IS in-fact limiting power uptake to 200-500 ma when it thinks its connected to an MTP source.

Would be nice to do this in software, but I guess I can mod my third party charger.

This, and countless other posts, sum it up more or less : http://xdaforums.com/showthread.php?t=999366

here is another ; http://xdaforums.com/showthread.php?t=845844

from wikipedia "The Dedicated Charging Port shorts the D+ and D- pins with a resistance of at most 200 Ω. The short disables data transfer, but allows devices to detect the Dedicated Charging Port and allows very simple, high current chargers to be manufactured. The increased current (faster, 9 W charging) will occur once both the host/hub and devices support the charging specification."

"As it turns out, the USB-IF came up with a USB Battery Charging spec [usb.org]. The spec is long and boring, but it boils down to: short together the data lines (no resistors required) and you indicate that you're a dumb charger that can supply anywhere from 0.5A to 2A."

So not only are you being rude for no reason, but you are also spreading mis-information.
[Galaxy Tab 8.9 SGH-i957 Android Development] orlandoxpolice:
Could you discuss this issue in another thread, I don't want to derail this one more than it has already.
[Galaxy Tab 8.9 SGH-i957 Android Development] modestone:
Will do.

The only reason I even mentioned it here in the first place was because it is usually something done at the kernel level.
[Galaxy Tab 8.9 SGH-i957 Android Development] orlandoxpolice:
Croak... Did you really remove the entire first post? I understand people have disagreements but it's no reason to hinder the progress of the community, especially at a time that we need all the help we can get. Hope you will reconsider.
[Galaxy Tab 8.9 SGH-i957 Android Development] orlandoxpolice:
I like Croak. Testing something for the first time is still a big step and he deserves credit for the work that he put in from his end.

Anyways, thanks for the repost of the instructions. I can format a bit and add it to the front page so we don't lose stride. I'll also add the original .lib files in case anyone wants to revert back.
[Galaxy Tab 8.9 SGH-i957 Android Development] modestone:
I am certainly not one to hold a grudge, if Croak was just having some kind of real life crisis and snapped in the forums, hey it happens!

But to delete information that was posted to a public forum (and then became public domain) and to actively try to undermine other peoples work and research into the device, all because why?

Because I told him I thought something might not be quite right in what he said, and then provided clear and concise information to why I thought it may be that way?

The normal response in a discussion would be to address the points I made, and thats that.

Instead he just throws all the valid info I presented out the window, and essentially replys with "What I said is right".

Um ok, well I just gave you a bunch of data that says otherwise.

I don't care who is right or wrong, I just want the truth.

So far I can present far more testable, verifiable proof for my theory, then Croak can by "Blowing it out our asses" and just being "right".

Hell what I am saying isn't even a theory, its basically fact, and a few searches on XDA or google will show you that...

And why delete the master post for the kernel, when our discussion had NOTHING to do with that post, or any of the info in there, that is just childish.

I am all for donating to devs,(and have all the way back to the Touch Pro), but would you honestly tell me you would feel fine about donating to someone like croak after all this (not that he is a dev)?

I wouldn't donate to a dev who flips out when someone comes to them with valid information.

I do have to have a good laugh at croak thinking he can just delete posts and screw us over, and then seeing post# 2 containing all the info anyways, glad I could help.

bwahaha

Anyways, done with this topic, back on track.....

As a side note, if we need a reliable fast place to store some files, like I said before, I'm a network administrator for an ISP, and have plenty of places I can stick them indefinitely.

Also I will gladly be a Guinea pig for any of Da-g's work.
[Galaxy Tab 8.9 SGH-i957 Android Development] orlandoxpolice:
Ok post #2 is up. Formatted the same as the Root thread, since this kernel also acts as a root. Instructions are very simple as well. Can you guys check if all of the links work, and if I linked to the correct kernel (I believe the 1944 one is the latest). Point out any mistakes, but I don't think there are any.

Thanks.
[Galaxy Tab 8.9 SGH-i957 Android Development] modestone:
Wow nice work, that is excellent!

I haven't checked all the links but it looks great.
[Galaxy Tab 8.9 SGH-i957 Android Development] modestone:
Just in case anyone is wondering, (not trying to get derailed again I promise)

http://xdaforums.com/showthread.php?t=845844

This works, and I am able to pull the full 2 amps from my third party charger, hooray!

(notice that this topic was done over a year ago, before they had custom kernels that take care of this issue)

Would be a whole lot easier if we could get it enabled at the kernel level instead though, like the kernels available for the 73xx models.
[Galaxy Tab 8.9 SGH-i957 Android Development] TEKHD:
Damn... Really Nice find!
[Galaxy Tab 8.9 SGH-i957 Android Development] modestone:
Glad I could help!

Sooooo...

I am working on opening up communications with a dev from another forum that specializes in porting Clockwork Recovery Mod to devices.

Sounds like he may be willing to work with me on it, fingers crossed!

We may get to see some rom development soon weeeee
[Galaxy Tab 8.9 SGH-i957 Android Development] orlandoxpolice:
Nice work.

I'm looking into talking to some skyrocket devs as well
[Galaxy Tab 8.9 SGH-i957 Android Development] modestone:
Work is underway!

I think we have a pretty good chance of getting a custom recovery on our 8.9 LTE's soon!
[Galaxy Tab 8.9 SGH-i957 Android Development] RipplingHurst:
Great news, can't wait!
[Galaxy Tab 8.9 SGH-i957 Android Development] modestone:
Well fellas, I have a priliminary/test custom CWM recovery image for our device, that should be flashable by ODIN.

I have not flashed it yet, planning on doing it tomarow morning.

In the event that something goes awry, I don't want to be stressing all night long about it ;)

I will keep you all posted!
[Galaxy Tab 8.9 SGH-i957 Android Development] orlandoxpolice:
Nice work. If it gets botched as long as you can get into download mode just flash back stock via Odin. Cwm could break the hard key recovery I think it but you could use adb commands in that case (I think).
[Galaxy Tab 8.9 SGH-i957 Android Development] JayWheelz:
Cool modestone. Good luck I hope it all goes well.
[Galaxy Tab 8.9 SGH-i957 Android Development] modestone:
Well round one didn't work out, ODIN hung at the point it actually tried to write the recovery.img from the .tar over.

Eventually I powered down the tablet, which it immediately booted back up into "Firmware Update Failed, please connect KIES in recovery mode".

I decided for the hell of it to try re-flashing the OC kernel to it at this point, even though what I attempted to flashed had nothing to do with the the kernel.

It successfully flashed over, and my tab booted up normally.

I think what happened there is the tab saw a failed flash, so it decided to force download recovery mode till something was flashed, even though the failed file likely didn't write anything at all to the filesystem.

Then when it saw a successful flash, it decided, "Ok we can boot up normally now"

All just guesses, but anyhow there's your update!

We are working on some other plans of attack now.
[Galaxy Tab 8.9 SGH-i957 Android Development] modestone:
Progress is being made, I think were getting close, the sgh-i957 is kind of un standard when it comes to how its boot and recovery partitions are setup and utilized, so most of the trouble has been in figuring that bit out.
[Galaxy Tab 8.9 SGH-i957 Android Development] RayEarth:
Can't wait for a custom rom!
[Galaxy Tab 8.9 SGH-i957 Android Development] orlandoxpolice:
Progress is slower since a dev doesn't own it but at least we are getting somewhere. The closer we are to finding the differences from the skyrocket the easier ports may be for ics.
[Galaxy Tab 8.9 SGH-i957 Android Development] modestone:
Well I seem to have pretty thoughly bricked my poor tab.

Without going into to much detail, I should be more careful with .pit files and ODIN heh...

The tab itself appears totally dead, no boot, no back light, no matter how long you hold the power button / vol button combos.

When you plug it into a computer, it shows up as QHSUSB_DLOAD, and cannot find a driver.

ODIN and HEMIDALL don't see it at all.

I managed to find a QHSUSB_DLOAD driver of some sort, and using QPST was able to see that it was a com port, but I can't do anything past that.

Any of the tools in QPST say they cannot be used because the device is in download mode.

Anyways, pretty sure its gonna have to go to samsung to be fixed.

Which blows, because were pretty sure our next test will be successful, but of course who knows :)
[Galaxy Tab 8.9 SGH-i957 Android Development] orlandoxpolice:
I'll do some research when I get home to see if I can help you out
[Galaxy Tab 8.9 SGH-i957 Android Development] modestone:
I was litterally 1 day inside of my 30 day return window at AT&T, so I decided to run down to the local store where I bought it, and was able to exchange it for a working one.

"I was just watching some netflix and it went totally black all the sudden! Now it won't do anything at all!"

A few mins later and I am back in action.

However I don't really want to be bringing another one back to them any time soon :)
[Galaxy Tab 8.9 SGH-i957 Android Development] modestone:
Anyone feeling brave and want to flash a new test kernel with cwm cooked in?

:)
[Galaxy Tab 8.9 SGH-i957 Android Development] orlandoxpolice:
Risk of brick?
[Galaxy Tab 8.9 SGH-i957 Android Development] modestone:
Isnt there always :-)

nah these have all been *pretty* safe, i just got stupid and used a random pit file for no real reason, total shot in the dark and not advised.

This is a kernel compiled from da_g's source, modified with a recovery built in, it should either work or not, but shouldnt mess with the built in download mode for odin recovery.

Im probably gonna give it a shot tomarrow, just in the process of moving so been busy a lot heh.

Any how if your willing to give it a shot and accept the risks involved ill pm ya a link.
[Galaxy Tab 8.9 SGH-i957 Android Development] orlandoxpolice:
Pm me the link. I'll check it out tonight.
[Galaxy Tab 8.9 SGH-i957 Android Development] modestone:
Pm sent, let me know what ya find!
[Galaxy Tab 8.9 SGH-i957 Android Development] JayWheelz:
I'd test too. I actually want to brick mines so I can take it back to ATT and get a new one lol
[Galaxy Tab 8.9 SGH-i957 Android Development] modestone:
lol pm sentol

---------- Post added at 07:58 PM ---------- Previous post was at 07:47 PM ----------

Sent you guys the dev's info and irc stuff if you wanna get in there with him, hes aware of your willingness to test :)

Just remember its all at your own risk as usual.

He would actually prefer if you were in IRC with him so he can help debug
[Galaxy Tab 8.9 SGH-i957 Android Development] orlandoxpolice:
I'd prefer that as well lol
[Galaxy Tab 8.9 SGH-i957 Android Development] modestone:
hes wondering why no ones showed up yet heh
[Galaxy Tab 8.9 SGH-i957 Android Development] orlandoxpolice:
i wont be able to get on until a bit later tonight
[Galaxy Tab 8.9 SGH-i957 Android Development] orlandoxpolice:
talked to the dev for a long time tonight (great guy). we found where the recovery was on the system.

if in adb you use the 'adb reboot recovery' command, it brings you to the 3e system recovery which is normal for devices

underneath the recovery menu, it has yellow text saying: "command: "/sbin/recovery""

there is no /sbin directory though...

I had my system pull from a while back, so i searched the files for the recovery and it was in /system/bin/recovery.

so.....we are thinking that if you replace the recovery file in the directory with the custom one, then we are in business. it will simply look for the /system/bin/recovery file and run the custom one instead of the stock one.

the issue with this, is if for some weird reason this does not work, you are stuck in recovery mode. and with no removable battery, it could be a long, long time before your battery dies in recovery mode. i have tried to drain my old captivate in recovery and it would not die.

anyway, if anyone is really brave, or within their 30 day return period, let me know. I have the custom recovery file i can link you. you need to know adb commands though, to do the following:

adb shell

rm /system/bin/recovery

exit

adb push recovery /system/bin/

adb shell

chmod 755 /system/bin/recovery

So yea.....lets see where this leads.
[Galaxy Tab 8.9 SGH-i957 Android Development] modestone:
Right on!

I am glad you guys got together, the more minds working on this the better!

I am in the process of moving right now so that's kept me kinda busy...

Great to hear an update though, please do keep me posted!

Now back to lifting heavy ****....
[Galaxy Tab 8.9 SGH-i957 Android Development] modestone:
Utkanos is curious if you can pop in irc again today orlando.
[Galaxy Tab 8.9 SGH-i957 Android Development] orlandoxpolice:
Im in, ill stick around and see if he hops back in sometime tonight.
[Galaxy Tab 8.9 SGH-i957 Android Development] orlandoxpolice:
I have a kernel now for testing with cwm built in. Will have the link soon.

watching progress on the captivate glide cwm i927 as we speak and it worked. ours hopefully should be similar.

we need a more testers!!! PM or reply

So i flashed the recovery. i can get into clockworkmod but there are 4 tiny menus instead of 1 large one. the commands are buggy and i cant backup.

but.....this is a working step. this means we can work off of this. so we are on good ground and we know we wont brick or mess up the device by flashing different recoveries. ty utkanos!
[Galaxy Tab 8.9 SGH-i957 Android Development] modestone:
Waaahooooooooo !!!!!!!!!

Awesome work orlando and utkanos, I knew we could get here with enough people involved.

My tablet bricking has been justified!

This is great news!
[Galaxy Tab 8.9 SGH-i957 Android Development] orlandoxpolice:
we arent out of the woods yet. there are a few issues we are working out. samsung did some weird stuff with this tablet.....but we wont brick it which is ok. give us a day or two more. hop in IRC if you want.

edit: got into 1 menu cwm with single toggles. very nice. also very late so we will continue tomorrow. good stuff happening.
[Galaxy Tab 8.9 SGH-i957 Android Development] modestone:
I wonder if we should break this discussion off into its own thread, now that were getting somewhere.

I guess were still basing it off of da g's kernel for now
[Galaxy Tab 8.9 SGH-i957 Android Development] JayWheelz:
I'm signing on to help out. Again sorry for the delays. I got pretty busy this week.
[Galaxy Tab 8.9 SGH-i957 Android Development] orlandoxpolice:
I dont think we need a new thread, will make one when its complete.

Da_Gs original kernel is basically stock with minor tweaks, so I consider it stock.

We can get into CWM now, but for some reason it is freezing during backup, and there are some menu issues. Got a recovery log to poke around in though. Just an update.
[Galaxy Tab 8.9 SGH-i957 Android Development] JayWheelz:
Orlando let me know if you still need me for testing. I was on earlier but nobody said anything with the dev.
[Galaxy Tab 8.9 SGH-i957 Android Development] orlandoxpolice:
you can hop in now just to say hi if you want. he is currently working on the glide with some folks
[Galaxy Tab 8.9 SGH-i957 Android Development] JayWheelz:
ok no problem
[Galaxy Tab 8.9 SGH-i957 Android Development] orlandoxpolice:
We REALLY need one or two more testers to try this out.

If you know Odin and ADB that would be a time saver, but if you want to help out and dont know, we could walk you through it.
[Galaxy Tab 8.9 SGH-i957 Android Development] TEKHD:
Everyone seems to be online right now... Lol... Any new news about Recovery for the Tablet?
[Galaxy Tab 8.9 SGH-i957 Android Development] JayWheelz:
We got one for a tab posted here.

http://xdaforums.com/showthread.php?t=1462770

We need more testers to get it outta alpha state. But it works just fine right now. Hopefully we'll see a ROM or 2 to be able to play with soon.
[Galaxy Tab 8.9 SGH-i957 Android Development] orlandoxpolice:
Bascially everything is tested but wipe data / factory reset.
[Galaxy Tab 8.9 SGH-i957 Android Development] Ikaro:
Enable USB Chargin...

Hello guys, you can enable USB charging on modified kernel??

I usually charge my phone and the tablet P7500 via USB from the notebook and I would be comfortable doing for the SGH-i957.

Thanks in advance!

P.S. hello Da_G can you hear me?? ;)

Max
[Galaxy Tab 8.9 SGH-i957 Android Development] orlandoxpolice:
I'll ask da g
[Galaxy Tab 8.9 SGH-i957 Android Development] modestone:
Been wanting this myself for a while, I ended up modifying a cable to make it work, after trying to work out some details with Croak, and him being a jerk...
[Galaxy Tab 8.9 SGH-i957 Android Development] TEKHD:
Here we go... Again... Lol...
[Galaxy Tab 8.9 SGH-i957 Android Development] Ikaro:
Thank you and I look forward :)

Max

---------- Post added at 01:19 AM ---------- Previous post was at 01:16 AM ----------

Thanks modestone but I really need the modification the kernel to use the original cable, it is more convenient :p

Max
[Galaxy Tab 8.9 SGH-i957 Android Development] malimal:
thanks for the work. using setcpu @ 1.56.
[Galaxy Tab 8.9 SGH-i957 Android Development] orlandoxpolice:
Can't get this stable still. Keeps crashing when I browse the market at 1.728
[Galaxy Tab 8.9 SGH-i957 Android Development] modestone:
For reference, my first tablet was able to comfertably run at 1.94 with almost no instabilty.

My replacment tablet struggles to run at 1.7, and pretty much immediatly locks up at anything past that.

So there are deffinately variations in the chips, i wish I didnt brick my first one heh.
[Galaxy Tab 8.9 SGH-i957 Android Development] orlandoxpolice:
What temp do you guys run at? Mine stays around 35c
[Galaxy Tab 8.9 SGH-i957 Android Development] neubauej:
My old one hung out at 36c or so. My new one sits about 33c

How would one go about getting the stock bootanimation back on this kernel?
[Galaxy Tab 8.9 SGH-i957 Android Development] modestone:
Where are you getting your temp readouts?
[Galaxy Tab 8.9 SGH-i957 Android Development] orlandoxpolice:
Temp+ CPU v2
[Galaxy Tab 8.9 SGH-i957 Android Development] neubauej:
Same here Temp + CPU.

If you have Set Cpu installed it will be in there also under the "info" tab.