yashsingh1/xdaforums huggingface dataset:
[Galaxy Tab 8.9 Android Development] pseudoheld:
nothing to do with background apps. i've been around this block a couple of times.

its an issue that first came up with the 10.1 ics ports. the battery gets discalibrated and needs to be recalibrated manually:

http://xdaforums.com/showthread.php?t=1861229

with screen off i have hardly any drain but as soon as i turn the tab on the juice goes down really fast. the OS then reports the battery as empty whilst it still has loads of voltage left.

i am currently draining the rest of the voltage from cwm (the only way to completely drain it) and will then start the reset progress.
[Galaxy Tab 8.9 Android Development] Stamgastje:
I had this problem shortly after installation of the latest version of this ROM. But after some time Windows did recognize the tablet as an MTP device again, so just wait a bit until the new ROM has "settled". ;)
[Galaxy Tab 8.9 Android Development] StarkCity:
Yes.....horrible. Had to go back....
[Galaxy Tab 8.9 Android Development] pershoot:
sorry all. have not had a chance to circle back with sec_keyboard. will get back to it and help once i get things calm in my side of town.
[Galaxy Tab 8.9 Android Development] jankhner:
try to disable debugging. it worked for me.
[Galaxy Tab 8.9 Android Development] pseudoheld:
try and do the recalibration as i mentioned in my previous post!
[Galaxy Tab 8.9 Android Development] StarkCity:
I did....my stats went crazy. It's all good. I'm gonna hang back a bit.
[Galaxy Tab 8.9 Android Development] OmarEinea:
battery recalibration !!!!

once i have battery recalibration issue in my p7300 and i solve it but after a lot of time

so i am thinking to flash cm 10 ( 2012-10-13 ) ,is there any resk of that on my battery ????

and is there a way to not go back to the battery recalibration issue ???? :confused:

for give for my english
[Galaxy Tab 8.9 Android Development] pseudoheld:
well seen as i got rid of my battery issue and it reappeared after flashing this rom i guess its a definative possibility that you will once again have issues.

right now i am recalibrating my device. will see how that goes. i think its probably because its based off of the 10.1 kernel but thats just me guessing. im no dev.

but otherwise this is probably the best rom for our tab! if you don't rely on your battery tooooo much i would definately flash it!
[Galaxy Tab 8.9 Android Development] dknotty:
That seems to have worked, thanks.
[Galaxy Tab 8.9 Android Development] notz76:
I'm also have troubles with battery... It drains too much.
[Galaxy Tab 8.9 Android Development] _strauch_:
Maybe the same problem like the 7510port has. It drains fast but the battery wasnt empty. After a restart it was ok for a few minutes....

Gesendet von meinem GT-P7310 mit Tapatalk 2
[Galaxy Tab 8.9 Android Development] dknotty:
Yes, mine drains pretty fast as well. 5% in about 15minutes. I did wipe battery statistics so should settle in a few cycles.
[Galaxy Tab 8.9 Android Development] martin707:
Just want to emphasize to newbies that the battery issue doesn't mean that your battery is broken. It just need recalibration for the OS to estimate battery consumption.
[Galaxy Tab 8.9 Android Development] Jnn1:
Just can't say how happy and lovely it is to have kalt kaffe back developing for us! The newly updated cm10 is superb! No battery or screen problems here. Many many thanks!

C.f. how can I make a donation? I can't find a link here, or on your profile or github page. I already purchased your external keyboard app on Google play, but would like to make a donation for your commitment to tab 8.9 development! Do let me know
[Galaxy Tab 8.9 Android Development] OmarEinea:
enable 3g in p7300

hi guys

i flash cm 10 (2010-10-13) on my p7300 and every think is working for now except 3g because

i used to put the ( access point name >> mobile netwarking ) >> ( APN : payandgo.o2.co.uk , and the username : payandgo) and it warks awsome on the previous roms but now it is not

so please if any one knows another way to enable 3g on my tab .. please tell me how :confused:

for give me for my english
[Galaxy Tab 8.9 Android Development] TheDamFr:
3g is coming ;) But not for now...
[Galaxy Tab 8.9 Android Development] pseudoheld:
wiping battery stats does nothing to help this problem!

a proper fix:

http://xdaforums.com/showthread.php?t=1861229
[Galaxy Tab 8.9 Android Development] fred_be9300:
I'm reading almost every thread on this forum (7300/7310 related), even if I don't flash everything

We've had these battery calibration issues pop up 3 times:

- kk's ported ICS 10.1 rom with kernel compiled from 10.1 source "with 8.9 profile". Never fixed

- AAccount's modified stock ICS kernel based on 10.1 sources. Fixed by rebasing on actual 8.9 sources in his kernel version 1.7.3

- kk's cm10 preview of 2012-10-13, with 3.1 kernel (probably a close copy of pershoots cm10 for 10.1 tabs).

I'm not throwing any stones, not at all. I'm just offering this up hoping to point in direction of solution. I remember running the ported ICS and getting this battery problem as one of the first. It was nerve wrecking, so I just wish to save others from that.

I'll take the opportunity to thank kallt_kaffe, pershoot and c-o-m for their efforts, and for sharing not only their result, but also the knowledge. Hats off :)
[Galaxy Tab 8.9 Android Development] jessevl:
For the people with calibration problems: I have tried recalibrating using the usual methods (discharge in cwm --> 1 hour rest --> charge 5+ hours --> 1 hour rest) for several times now to no avail. Now I read in the p7510 battery issues thread that disconnecting the battery should also work, and indeed it did! done in 5 minutes instead of several days of recalibrating. It's now reset to the factory default discharge curve so it might be a little bit too optimistic (since my battery isn't new anymore) but I think that should go away after a few charges.
[Galaxy Tab 8.9 Android Development] VeEuzUKY:
What is the p7510 battery issues thread you read? I would read it also, thanks:)
[Galaxy Tab 8.9 Android Development] jessevl:
http://xdaforums.com/showthread.php?p=16771651#post16771651
[Galaxy Tab 8.9 Android Development] pseudoheld:
my guess is also that the kernels ported from 10.1 are introducing the issue. as soon as AA made a kernel based on the original 8.9 one all my battery problems went away.

so it seems very probable that the porting of the 10.1 (which has a larger / different battery) is causing the discalibration.

i would like to have some devs input to this issue. im guessing most don't even notice the battery issue because they are too busy flashing new builds ;)
[Galaxy Tab 8.9 Android Development] VeEuzUKY:
Thank you very much jessevl:good:
[Galaxy Tab 8.9 Android Development] C-o-M:
AAccount's kernel is useless for us unless he uses a proper source control.

But if it's really the rebase that fix the problem, I can upload a new kernel tonight. I've done that rebase 2 weeks ago; hoping that it fix the reboot (sec_keyoard) bug, but it didn't.
[Galaxy Tab 8.9 Android Development] dknotty:
Great ROM but OMG the battery just drains!

21% gone in 30 mins while watching a movie.
[Galaxy Tab 8.9 Android Development] pseudoheld:
please take the time and read back the last few pages. this is a known issue and isn't really battery "drain" (meaning the rom using loads of voltage) but a misscalculation of how much voltage actually remains thus leading to the "discharge"
[Galaxy Tab 8.9 Android Development] dknotty:
So will the be sorted by an update to the ROM or?
[Galaxy Tab 8.9 Android Development] taiger78:
Well I'm not one of the developers but I think that that is what they are trying all the time to get the ROM even better(if you read the tread). We whom was not gifted with the power of coding can only sit back and relax.
[Galaxy Tab 8.9 Android Development] pseudoheld:
Just to let you know I tried to recalibrate my battery, but it didn't work at all.

Hoping for a rebased kernel.

Edit: just to let you know since recalibration **** got a lot worse. When screen is on I now have about 20 minutes from 100-0.

Even with charger connected its still discharging lol...

To put it nicely its unusable for me ;)

Really hoping for a fix soon
[Galaxy Tab 8.9 Android Development] Stamgastje:
Weird that you all have those battery calibration problems, my tablet seems to run fine! I last charged it Friday night and it still has 50% remaining after 3 days of use, including a ROM update (from release 2012-10-12 to 2012-10-13).
[Galaxy Tab 8.9 Android Development] kallt_kaffe:
New builds in first post. I think bluetooth audio should work now but I have not tried it. Have not looked at any battery issues yet and I must say I don't see this problem on my device.
[Galaxy Tab 8.9 Android Development] fercen:
Thanks for the hard work that been put in by the dev's, to me this working very well. But it's a concern for me that 3g is not working at the moment. Is there any input from the dev's if this will take days/a few weeks or longer than that to develop? I understand that it is hard to estimate, I'm just trying to get some input on if I should stick with this version or revert back to CM9 for now.
[Galaxy Tab 8.9 Android Development] Brendo:
I'm still using 0912 version and after 3days of moderate use, battery is at 70% (wifi always on). Suggest you all just drop back to that version
[Galaxy Tab 8.9 Android Development] abalam:
I have a problem. Today CM10 flashed on my P7310. Flash and boot went well but when I tab off and he was put on a disturbing screen hang. Then restart but problem came back for. This is only when I put it in sleep mode and then remove from hibernation. Anyone have a solution?

CyanogenMod 10

AES tweak
[Galaxy Tab 8.9 Android Development] Jaggle:
The weirdt part of the of the battery problem is that when the tablet shuts down and you put it on the charger. The charging battery icon shows that its still have 75% :confused::rolleyes:
[Galaxy Tab 8.9 Android Development] pseudoheld:
People's inability and unwillingness to read concerns and confuses me.

Just lead back the last pages. It's all been explained.

@kallt:

I know it's hard to troubleshoot a problem, that you don't have. Is there anything I can do to help. I am still having the issue so if you want me to test sth I would gladly do so and report back.

I think a big part would ne understanding why some People have this problem and some don't. Maybe different tab makes/baseband /or sth like that?

As I said let me know what I can do. I my battery is totally discalibrated. In 2 mins of switching on and writing this I'm down 10% :)
[Galaxy Tab 8.9 Android Development] C-o-M:
If you want to speed up development, then buy kallt_kaffe a new tab ;) Currently, none of the devs has a 3g tab, that makes it hard to fix it.
[Galaxy Tab 8.9 Android Development] nexus_g:
Hi. KK just post another build. Could somebody confirm the 3g is working for the latest build? Is the battery issue hardware problem or software, cause KK mention that his tab has no such battery calibration problem. Thanks.
[Galaxy Tab 8.9 Android Development] fred_be9300:
Removed my post... Sorry, you're talking about battery. I had a momentary lapse of consciousness and thought you talked about bootloader
[Galaxy Tab 8.9 Android Development] cashif:
I am so tempted to flash this ROM but the battery calibration and 3g not working is putting me off. Having used various ROMs, I would vouch that CM10 (2608) was the fastest ROM i have used but having gone through the battery calibration procedure in Tracid ROM, I am not willing to lose my battery.

I know you devs are higher beings compared to us mortals, but KK can u pls inform whether the ROM has been ported or has been developed from leaked ICS because after flashing stock rom (leaked) with A1 1.7.3 kernel, my battery problem was resolved. Could you pls look into it.

Finally, I thank you for keeping this Tab alive because I was so disappointed after seeing the support service of samsung!. I fully appreciate your efforts..
[Galaxy Tab 8.9 Android Development] fred_be9300:
There's a solution to that, a little hint for your reading and search: you need to update the bootloader. The "old" solution for that is flash a whole Rom that includes good bootloader . It's a 400mb download... Kallt_kaffe has extracted just the bootloader (2mb) from that Rom, and made it available in this thread, a few days back.

Please report back, as you will be one of the first to try to fix this with the bootloader alone. Also what tab you have? WiFi or 3g?

Link: http://xdaforums.com/showthread.php?p=32802991

---------- Post added at 09:27 AM ---------- Previous post was at 09:16 AM ----------

On the battery issues...

It seems to come on at different times for different people. Some were using the ported 7500 Rom for weeks, other for days, when it happened. I suspect that charging habits play a role.

It seems to come on immediately after charging. (in a specific way?)

Never immediately after flashing.

Perhaps it is triggered when charging with tab fully powered off? (for the full charge time, or at any time, or at time of starting the charging). I know my tab has switched off (low battery) when I charged it (on old ported 7500 ics) leading up to battery trouble.

Or triggered by charging from fully empty battery (letting tab switch itself off)

Or ... some other trigger....
[Galaxy Tab 8.9 Android Development] chriscsh:
is that use the same bootloader for both wifi & 3g version tab?
[Galaxy Tab 8.9 Android Development] dknotty:
Question, I can flash the tablet to a previous ROM or do I need to do a full factory reset beforehand?
[Galaxy Tab 8.9 Android Development] Jaggle:
Well I give it a try to charge it in on mode. Cause now it has charged all night in off mode en still says that it's empty pfffff. :(
[Galaxy Tab 8.9 Android Development] OmarEinea:
i try cm 10 ( 2012-10-16) om my p7300

it is working perfectly except for 3g it isn't working :(
[Galaxy Tab 8.9 Android Development] nexus_g:
Hi, could you tell us from what ROM are you using before installing cm10? Is the battery issue for both 7300 and 7310 or just 7300 only. Thanks.
[Galaxy Tab 8.9 Android Development] C-o-M:
This ROM is built from sources. It has nothing to do with leaked ROMs.

You should always do a factory reset when you do a downgrade or switch to a different ROM. Of course you can try it without, but since the last builds are Android 4.1.2 and you probably want to switch back to 4.1.1, you might get a lot of force closes.
[Galaxy Tab 8.9 Android Development] mali100:
Hi,

I attached a logcat and dmesg from the boot of my 7300, maybe this helps debugging the 3g problems (working SIM card was inserted, WLAN disabled).

Thanks for your work guys!

/edit: This log is from the latest CM10 2012-10-16, modem seems to work partially, I received a SMS.
[Galaxy Tab 8.9 Android Development] zooster:
Guys, is it possible to add to the first post what's working and what's not or partially/bad?

It's not easy to understand how much unstable/stable this rom is. In that way everyone can decide whether to try it or not yet..
[Galaxy Tab 8.9 Android Development] StarkCity:
Nah, just read.....this is one of the best ROMs out for our tablet. Currently, everything is working that needs to, but there is a major situation with the battery. If you read back a few posts you'll see recommendations on what versions people are happy with (9.12) etc.....I'm on an old version, I'm just missing the front cam but its the most stable build thus far imo .
[Galaxy Tab 8.9 Android Development] Jaggle:
Well what the battery problem of my tab. I think I'm on the right track. This morning after a night of charging I couldnt get my tablet working because the battery was still empty :rolleyes:. So I put my tablet on the charger, turned it on and in one minute I got a full charge battery. Which, when I didconnected the charger drained in 1 minute. I repeated this a few times now and the battery charges slower and last longer. So I hope this is going to work.

Verstuurd van mijn GT-P7310 met Tapatalk
[Galaxy Tab 8.9 Android Development] ih8crackerbarrel:
I just upgraded to the 10/13 build and it seems very stable on my P7310. I'm not having any battery issues and it did seem to resolve the front facing camera and the turn-off-while-charging issue.

The only thing new I've noticed is that my lock screen is always stuck in landscape now. Not really a big deal, but I just thought I'd mention it to see if anyone else is seeing it or just me.
[Galaxy Tab 8.9 Android Development] :
Also running the 1013 build, no problem for me in lockscreen. Also no Battery Issue (never had it actually, not even in kks port)
[Galaxy Tab 8.9 Android Development] riemer:
For me, aosp beta 8 is speed, and the version of cm10 of 16/10 very slow. 20 mn to start my gtab

Envoyé depuis mon HTC Sensation XL with Beats Audio X315e avec Tapatalk
[Galaxy Tab 8.9 Android Development] Jnn1:
Dirty flashed 10.16 version over pre-installed 10.13 and all is fine for me at the moment. No battery problem, no deep sleep problem, external keyboard connects well, all smooth and stable.

For those who do have battery problems, I can't help thinking it's the same that keeps popping up in 10.1 and 8.9 tabs when flashing custom roms, not just this one, and believe ensuring a hard drain in cwm or continuous booting to fall below 3.4, leave overnight for good measure, charge to over 4.2 should reset and solve the issue ....... but if you've tried that, I admit, I'm also totally baffled ... :(
[Galaxy Tab 8.9 Android Development] Der Straßenapotheker:
Good afternoon,

kallt, when do you go nightly or rather the ROM gets downloadable at www.get.cm ?
[Galaxy Tab 8.9 Android Development] C-o-M:
I can only repeat myself: logcat or it didn't happen (and you won't get help since I cannot reproduce)
[Galaxy Tab 8.9 Android Development] _strauch_:
This Issues Needs time, on the 7510 Port i had the issue after thre charge cycles so maybe it come later.
[Galaxy Tab 8.9 Android Development] Kendroid:
My lock screen is also stuck in landscape.
[Galaxy Tab 8.9 Android Development] kallt_kaffe:
it's a checkbox in the rotation settings
[Galaxy Tab 8.9 Android Development] starmate23:
No 3G when I don't use wifi...

Hi there,

Thanks so much for this release. Great job done here!! I am using build 2012-10-16.

However, I have a problem with my 7300 tab. When wifi is on, I can see that I am also connected to GSM network and 3G, but when I turn off wifi, I lose all network.

Do you guys know what could be the reason of the issue?

Thanks again! :victory:

Jon
[Galaxy Tab 8.9 Android Development] didio:
Same here.. but when i disconnect my wifi (not turn wifi off). 3g is not working. Not a very big problem for me. With 2012-10-16 release the battery drain is gone on my tab. Keep up the good work.
[Galaxy Tab 8.9 Android Development] ih8crackerbarrel:
Also, is anyone able to get Netflix to play video? I'm just getting a black screen, sometimes with sound but most of the time nothing.
[Galaxy Tab 8.9 Android Development] ehcan:
Nope, shutdown happens for me on the 4th release.

Sent from my GT-P7310
[Galaxy Tab 8.9 Android Development] StarkCity:
Gotta change the build.prop so the device is recognized properly from what I've read.

Edit: posted without fully reading. On my kindle and a few other devices, Netflix will not function unless you rename build.prop to nexus 7. I've not tried, but this is the fix going around.

Sent from my Beast™
[Galaxy Tab 8.9 Android Development] ih8crackerbarrel:
Does anyone have any experience with editing this for this Rom? Will this help? If so what exactly needs to be edited in the file? I'm noticing a few games are having similar issues as well (like Avadon). Any help would be appreciated. It's not enough to abandon the Jolly Beans but it would be great if this worked.
[Galaxy Tab 8.9 Android Development] chemicalbuz:
SwiftKey has been updated for jb compatibility, now it shows predictions :-) just central number pad is still all black, don't know if it's a keyboard issue or rom related

EDIT: omg has a terrible bug, it writes what it wants, it is unusable
[Galaxy Tab 8.9 Android Development] chriscsh:
just install and i must say "WOW", very smooth :laugh:

hope the 3G version coming soon :p
[Galaxy Tab 8.9 Android Development] pseudoheld:
sadly i really need my 3g so this can't be my daily driver but i guess i'll give it a spin:

edit: wow really impressed with how smooth this feels! im back to ics for the moment but i'll be keeping a close eye on this developement!

keep up the great work!
[Galaxy Tab 8.9 Android Development] heilmaenner:
I flashed CM10 yesterday after a full wipe and must say I am totally amazed!

Performance beyond CM9 nighlies, apps working so far, but I'm also having FC's on dropbox. And I had to restore Gmail from my Titanium backup 'cause I haven't had it after flashing rom + jb-gapps.

Quite impressed!

Thx & keep up the good work, kallt_kaffe :)
[Galaxy Tab 8.9 Android Development] Jnn1:
Same here. Shut down while charging on 07.19 release
[Galaxy Tab 8.9 Android Development] Brendo:
Must be hit and miss then. I haven't had one with 18 or 19 (yet)

-----
[Galaxy Tab 8.9 Android Development] dairymasta:
Hmmm I feel like the dpi is really weird, everything seems big and fuzzy, look at the YouTube app for example....also why don't you just change the build.prop to nexus before releasing the builds for everyone? Would make life a lot easier
[Galaxy Tab 8.9 Android Development] Brendo:
If you read a couple of posts back, you'll see dpi had been changed because keyboard is weird otherwise

-----
[Galaxy Tab 8.9 Android Development] pascalsg:
Download dropbox from post 62. Uninstall dropbox if already exist. Install downloaded dropbox. If not working, clear cache. Works perfectly for me.
[Galaxy Tab 8.9 Android Development] ehcan:
Agreed. Transition is super smooth but in terms of raw performance ICS is not that far behind. However it does looks a lot better than the jump on the Galaxy Nexus from ICS to JB.

Sent from my GT-P7300
[Galaxy Tab 8.9 Android Development] dairymasta:
Yeah I'm aware of that, is there a way of changing the dpi and changing the keyboard to work with standard dpi or something?
[Galaxy Tab 8.9 Android Development] FlanFlinger:
At the risk of sounding a bit ****ty..........don't you think that would have already been done ? ;)

Remember this is still an alpha, it's just a small annoyance, there's more pressing problems to fix like the black screen thing that happens when you hit the recent apps list

The logcat when it blackscreens says

15:36:04.302 Error gralloc 117 NvGrPost: Failed, TEGRA_DC_EXT_FLIP 6 No such device or address
15:36:06.374 Error gralloc 117 NvGrPost: Failed, TEGRA_DC_EXT_FLIP 6 No such device or address
15:36:08.340 Error gralloc 117 NvGrPost: Failed, TEGRA_DC_EXT_FLIP 6 No such device or address
15:36:09.324 Error gralloc 117 NvGrPost: Failed, TEGRA_DC_EXT_FLIP 6 No such device or address
15:36:11.186 Error gralloc 117 NvGrPost: Failed, TEGRA_DC_EXT_FLIP 6 No such device or address
15:36:12.273 Error gralloc 117 NvGrPost: Failed, TEGRA_DC_EXT_FLIP 6 No such device or address
15:36:17.407 Error gralloc 117 NvGrPost: Failed, TEGRA_DC_EXT_FLIP 6 No such device or address

Interestingly rebooting from ADB when it's in blackscreen doesn't reboot it but shuts it down
[Galaxy Tab 8.9 Android Development] smoschi:
black / blank screen when try to change app about taskmanager!

dear galaxy tab 8.9 brothers and sisters,

im so happy that you are here and that we got so great devs like "cold coffee" :) ... because we are on of the smallest phone/tab community! ... but we are one of the first they got ICS and now JB on our device! THANK YOU!!!!:good:

i have a one problem and try to find about thread search toll but cant find nothing about my problem. i got allways a black / blank screen when try to change app about taskmanager! I installed about 5 times with a lot of wipe data / factory reset, wipe cache & dalvik but cant also fix this problem . who can help me?

i come from cm9 nightly from 19.7.2012 and have the 3g P7300 modell. i installed the last CM 10 / 4.th version and the last gapps. you have the same bug or its my P7300 device?

thx in forward

sophie from munich/germany