yashsingh1/xdaforums huggingface dataset:
[Nexus 7 Q&A, Help & Troubleshooting] ESdesigns:
Update on my problem

I tried swapping the battery from my other N7 that works flawlessly, that did not seem to make any difference. After 2 weeks on the charger and trying to power the tablet on at least once a day, my Nexus 7 finally powered on, I backed up all the pictures and data that I wanted from the tablet and did a factory reset. When the tablet is on it seems to work fine. I decided to power it off and see if it would power back on like it should. It powered off normally, but I can't get it to power back on. Any suggestions would be greatly appreciated.
[Nexus 7 Q&A, Help & Troubleshooting] hackdelight:
hellp

i had nexus 7 2013 4.4.4 kitkat version, to flash new android 5.0.2 I format the system from twrp and OS deleted.

then i tried to install android 5.0.2 factory image but when i tried to install bootloader via fastboot toolkit, it gave me an error that SIGNATURE MISMATCHED, I also unlocked the bootloader. I tried skipsoft toolkit but it also gave me the same error.

how am i able to flash new bootloader? can anybody help me?

Im using windows xp 32 bit system, i installed wmp 11 and mtp 12. my device can be detected by both fastboot and adb
[Nexus 7 Q&A, Help & Troubleshooting] DutchMan_1990:
two wallpapers option under wallpaper menu

Hi I'm with DU rom based on lollipop 5.0.2 and having this strange issue after recent update. Though it's not a big deal but if anyone familier with this please reply.
[Nexus 7 Q&A, Help & Troubleshooting] midnighteight:
Hello everyone!

I decided to switch to Lollipop Stock on my Nexus 7.

I downloaded the factory image, but when I tried to install it fails to install the bootloader.

This is the problem:

sending 'bootloader' (3911 KB)...

OKAY [ 0.522s]

writing 'bootloader'...

FAILED (remote: (InvalidState))

finished. total time: 0.758s

The strange thing is that I already mount the bootloader 4.23, but I do not know if the lollipop bootloader has some difference compared to kitkat bootloader.

Why I can not flash the bootloader ?? (Factory image MD5 checksum is correct)

I have to do some particular steps ??

Thank you all! :)
[Nexus 7 Q&A, Help & Troubleshooting] exgenmeikoj:
Anyone know how to disable Sig check on nexus 7 flo 4.4.4 I keep get force closing on all apps when I edited services.jar
[Nexus 7 Q&A, Help & Troubleshooting] GedBlake:
Hi, midnighteight...

If your Nexus 7 already has the v4.23 bootloader installed from KitKat, then there's no need to flash it again with Lollipop.

The FAILED (remote: (InvalidState)) error message is indicative of a very long standing, and known problem with the v4.23 bootloader that ships with some versions of the Google factory stock images... and actually pre-dates KitKat... originating with Jellybean back in 2013!!

And Google still haven't fixed it!!!

---

See the following threads for more details on this....

[Q] JWR66Y nakasi factory image bootloader problem

[WARNING][URGENT] N7 grouper (2012 WiFi) bootloader .img files from Google

---

For a version of the v4.23 bootloader that fastboot flashes without error, see the top of the very first post in this thread...

http://xdaforums.com/showthread.php?t=1907796

Although, as I've already said, if your Nexus 7 is already on the v4.23 bootloader, there's no need to flash it again. And I would generally advise against it. Flashing bootloaders always carries an element of risk, and is something to be avoided unless absolute necessity demands it.

And finally, THIS...

http://xdaforums.com/showpost.php?p=56761799&postcount=45

Hope this helps.

Rgrds,

Ged.
[Nexus 7 Q&A, Help & Troubleshooting] Tenari_Iranet:
Repair advice

I've got a Nexus 7 2012 in pretty good condition.... Battery's alright, USB works, headphone jack works... but the screen is cracked badly. Bottom half of the screen responds, everything else on the screen doesn't react to touch. I assume I'd have to replace the entire screen assembly. Is it worth it to purchase another screen assembly at this point? This would be my first time working with anything this small. I've replaced motherboards components from my laptops and built, repaired, and maintained multiple gaming desktops and servers. Is this a good first project? I imagine that if my Nexus 5's screen ever broke, the repair job would be a little more challenging to someone who hasn't taken apart a phone/tablet.

TL;DR: Worth it to replace screen assembly now?
[Nexus 7 Q&A, Help & Troubleshooting] deccan451:
My tablet battery dropped to zero and now it's not turning on after recharge... Display not showing anything got low battery sound once..
[Nexus 7 Q&A, Help & Troubleshooting] cptsashimi:
It's not too difficult and there are plenty of how to videos on YouTube. Just take it slow and easy.

The thing is, my 2012 is a dog and I don't know if I would waste the time and money on it. These things are starting to show their age. I think I would cut my losses and upgrade personally.

That's just me though.
[Nexus 7 Q&A, Help & Troubleshooting] Tenari_Iranet:
Thanks for the advice! I think I'll put it on the boneyard and move on. What tablet would you recommend? I'm an all-Nexus owner (N5, N4 as backup).
[Nexus 7 Q&A, Help & Troubleshooting] SCART69:
Can't Unlock Bootloader on 2012 N7

Never been unlocked before, N7 started crashing then one day wouldn't go past Google logo, can get into bootloader but not recovery, etc, restart bootloader just hangs (black screen). Done all the usual tricks but "fastboot oem unlock" doesn't work (gives me the screen on the N7 but pushing power button results in:

... INFOerasing userdata...

INFOerasing userdata done

INFOerasing cache...

INFOerasing cache done

INFOunlocking...

FAILED (remote: (Unknown error code))

and "booting failed" on the N7.

Which means can't send anything at all to it. Am on Mac but tried all the NRT, Android Studio, etc to no avail.

Wondering if there's a more forceful way of pushing it to unlock?

Bootloader info as follows:

Fastboot Mode

Product Name - grouper

Variant - grouper

HW Version - ER3

Bootloader Version - 4.23

Baseband Version - N/A

Serial Number - 0**************3

Signing - not defined yet

LOCK STATE - LOCKED

Any help appreciated, wife's sick so no spare cash to get it fixed & is her only eReader, browser, youtube viewer, etc.

Cheers ppl
[Nexus 7 Q&A, Help & Troubleshooting] SCART69:
Try charging using the USB plugged into computer instead of normal charger. Worked for me once.
[Nexus 7 Q&A, Help & Troubleshooting] cptsashimi:
I just know that my daughters' Nexus 7 (2013) are much faster than my 2012. I'm thinking about the Nexus 9 but it has some bad reviews. Maybe the nvidia shield?

What do you think?
[Nexus 7 Q&A, Help & Troubleshooting] malarkey25:
Nexus 7 won't connect to PC

I have posted thread a while ago, but nobody responded. Any ideas?

http://xdaforums.com/nexus-7/help/nexus-7-unable-to-connect-to-computer-t2995222
[Nexus 7 Q&A, Help & Troubleshooting] BurningShdw:
5.0.2 help

I have a stock Gen 1 nexus 7 and when I try to download the update it tells me I dont have enough storage even though I have 22 gigs free
[Nexus 7 Q&A, Help & Troubleshooting] Hannah Stern:
My Question (NRToolkit, Nexus 7 Backup, Locked Bootloàděr, WǔgFrê$h)

Can somebody please answer this Question?

http://xdaforums.com/nexus-7/help/android-manifest-xml-backup-t2994787
[Nexus 7 Q&A, Help & Troubleshooting] turbotd04:
Autodroid help

moved to right thread
[Nexus 7 Q&A, Help & Troubleshooting] ThePhoneGeek:
Question, I have the kids N7 2012 WiFi that has 5.0.1 loaded, bootloader unlocked, rooted. The device has downloaded the 5.0.2 update but it won't load probably because the bootloader is unlocked. I don't want to wipe the whole thing and start over. Is there an easy way to load this update without wiping the tablet?

Thx.
[Nexus 7 Q&A, Help & Troubleshooting] raSHOREY:
help

a good kernel for nexus 7 ?
[Nexus 7 Q&A, Help & Troubleshooting] Mannfred:
Hey guys! I really need your help. I got a Nexus 7 with a broken screen. So I dissassemblied the whole tablet, changed the touchscreen and assemblied everything again. Now it won't start anymore, but I can't find the mistake. Has anybody got an idea?
[Nexus 7 Q&A, Help & Troubleshooting] Matttis:
Hey guys!

I have posted in this thread before because of battery issues with my Nexus 7 3G on stock Kitkat.

Recently I flashed the Lollipop factory image. I still had roughly 12% of battery drain per hour on standby, the baseband_xmm_power wakelock being the problem according to Better Battery Stats.

However, I tried taking out the SIM and now that wakelock isn't a problem anymore. This never worked for me on Kitkat!

But I still lose roughly 5 to 6% per hour. Baseband_xmm_power is still at the top in BBS, but with just somewhere between 0 to 1%. The tablet is "leaking" somewhere else. In the list below the battery usage curve in the settings all it says is "display". I disabled automatic brightness, I set automatic standby to 2 minutes. Didn't help.

With 5% per hour the tablet is at least somewhat usable for me and will barely survive for one day, but this is still pretty awful considering that I used to charge it just once or twice per week when I first got it. It's an all new battery by the way, I changed it late 2014.

Would be great if you guys could help me or suggest a solution!
[Nexus 7 Q&A, Help & Troubleshooting] lotte67890:
Same with me, display drains the battery like a hungry wolf eats a...

I'm not sure whether to wait for the next release or switch back to KK or an alternate rom...

If you find out anything pls let me know...

Thx

L
[Nexus 7 Q&A, Help & Troubleshooting] MiPiMok:
I'm on Custon Rom with M kernel and F2S, and the display no drains the battery too much ! if you wanna try !
[Nexus 7 Q&A, Help & Troubleshooting] lotte67890:
Which rom exactly are you using?

The

L
[Nexus 7 Q&A, Help & Troubleshooting] MiPiMok:
Hi, i'm using the Xenon HD ROM, in F2S version, with a Kernel, i actually swich between two Kernels, the Oxydo Kernel and the M-Kernel.

No lag, no battery drains like kitkat !
[Nexus 7 Q&A, Help & Troubleshooting] lotte67890:
Wait a minute, do you own the Wi-Fi grouper (nakasi) or the 3g nakasig version?

Mine is the 3g version, so no xenon ROM... :(
[Nexus 7 Q&A, Help & Troubleshooting] friendlybiker:
5.1 is being released the end of February.
[Nexus 7 Q&A, Help & Troubleshooting] Rammbike:
Hi,

I wanted to upgrade my Nexus 7 through update in tablet, where it was running. I had comminque that upgrade is ready. So I downloaded it, and then installed. During instalation battery was on 100%. And suddenly some kind of error and the android give up.

I can't Restore Flash Stock through Nexus Root Toolkit but I have not access to bootloader.

What should I do?
[Nexus 7 Q&A, Help & Troubleshooting] betexino:
hi guys

i had flashed cwm then backup the stockrom ,wipe data/factory reset installin cm12 zip , made a second nandroid backup for the cm after that i restored the stockrom for some reasons but when i try to restor the cm12 again i have a cwm error message

using /data/media for /sd/0/clockworkmod/.recovery_version

what i must do to restore the cm backup?
[Nexus 7 Q&A, Help & Troubleshooting] milchmaennchen:
No device with "adb devices" running Mac OS X 10.6.8

Hi,

I did an OTA update of CM 11 and unfortunately the device did get stuck in bootloop (no nandroid or whatsoever...). I then entered in recovery and tried to sideload a new rom no luck. I checked with

adb devices (while in bootloader) but the device is not listed

I have the newest sdk for Mac installed cant boot my device.

Any help is appreciated. Ty!
[Nexus 7 Q&A, Help & Troubleshooting] andreyeurope:
Lollipop gives users a big headache(battery problem)

After 2 months of waiting for the new awesome Lollipop, I've just got this big joke called 5.0.2. Maybe you're asking why it's a big joke.

I omitted to tell you I have a N7 3G, and my battery has used to last more time on KitKat than Lollipop, and that my tab was less laggy and buggy than it is now, I mean sometimes my tab just freeze. So at least, will someone tell me if it's a hardware problem or just lollipopware? And will Google delay future Android update in order to release something nice, optimized and laggless and buggless, not just some fancy buttons and a colored notification bar?

P.S. For curious people, I've put 3 images on this post, but XDA is preventing me for posting legacy of my N7, the precious screenshots. PM if you want to see the images.
[Nexus 7 Q&A, Help & Troubleshooting] danielwbn:
Hi andrey, hi XDA community,

I have the same device, a Nexus 2012 3G that I recently updated OTA to android 5.0.2. I should add that I have no sim card installed.

Ever since the update it feels like the battery drains faster than I can reload it, 25% in an evening with minimum use (just playing music via bluetooth), another 25% over night just sitting there doing nothing. I have to recharge the battery now at least every other day, although I hardly use it. Before the update about once a week was enough.

Is there another thread that I may have overlooked where that issue is discussed in depth?

Cheers, Daniel
[Nexus 7 Q&A, Help & Troubleshooting] RusherDude:
Hello,

I have 2 n7s. One of them is rooted and such and flashed 5.1 without a problem. The other one is pure stock, started with 4.1 and got to 5.0.2 with all the OTAs in the way (13?). When sideloading the ota from 5.0.2 to 5.1, it all seemed ok, bootanimation ok, updating 1/155 applications ok, and after that, the black. Nothing on screen, completely black, not even background or system bars. When holding the power off button I see the power off menu over the black backround.

Also sometimes, rarely, the background appears and I see an error "SystemUI has crashed", when pressing accept it loops that again and again, no dice.

Cleaning cache does nothing. Rebooting in safe mode doesn't help either, same sympthoms.

Any way to "fix" this? that n7 is unrooted and bootloader-locked.
[Nexus 7 Q&A, Help & Troubleshooting] naishj98:
someone help. Nexus not booting.

I tried unroofing my nexus 7 using a guide and nexus toolkit. It all seemed to be working fine until I tried to boot my device. It wouldn't work. So I tried unlocking the bootloader to see if it'd work then and it still won't boot. I can boot into fastboot but nothing else.

How can i fix this please?!?:confused:
[Nexus 7 Q&A, Help & Troubleshooting] photoscubaman:
nexus 7 2013 no recovery memory and wont unlock

Hi there,

I have been sent my fathers Nexus 7 to see if I can fix it.

It only boots to google logo.

if i enter bootloader it will not go into recovery mode, just back to google.

If i use the tool kit it does find the device and serial number but i cant do anything as the bootloader will not unlock.

so i cant flash.

any ideas, as the usb debugging is not enabled either,

think it might be bricked.

many thanks
[Nexus 7 Q&A, Help & Troubleshooting] tenyrnote:
I have the Asus nexus 7 WiFi and I am unlocked and rooted. After installing 5.1 using Wugfresh's tool I noticed that its running very choppy and sluggish. I then opened titanium backup and saw that my Rom memory shows that it is completely full at 670mb? How can that be possible and how to I get it back to normal? I don't mind wiping everything, but always thought capacity was more like 2gb?
[Nexus 7 Q&A, Help & Troubleshooting] lotte67890:
Having the nexus 3g and even been completely stock 5.1 after a factory reset I switched back to 4.4.4 cause the tablet was nearly unusable.

Now it runs again smooth as desired.

L
[Nexus 7 Q&A, Help & Troubleshooting] fwayfarer:
I know this is late, but system partition size is completely different from device memory capacity and you have the two confused. It is normal for the ROM to use most if not all of the system partition once GAPPS are installed as system apks.
[Nexus 7 Q&A, Help & Troubleshooting] sjondenon:
After a long time, I decided to play with my Nexus 7 again. About a year ago, I bricked itsomehow (don't remember how exactly).

As a result, only the bootloader is installed. So no (custom) recovery and/or ROM. Today, I tried to flash the stock rom with the Nexus Root Toolkit but it didn't work.

My computer (Win 8.1) was not able to recognize my Nexus 7 in fastboot mode.

The device manager in windows labels my nexus as an unknown device of which the device descriptor request has failed.

I already tried to install many different driver packages (while removing the device from the device manager) but it did not work for me. Everytime, the tablet is seen as an unknown device.

I also tried to update the driver manually by right clicking on the unknown device in device manager and clicking update driver software and then manually selecting this http://support.asus.com/Download.asp...xus+7&p=28&s=2 driver but it does not recognize any driver.

So in short, my pc, which runs windows 8.1 is unable to see my Nexus 7 (which is bricked and has no rom nor custom recovery installed) when it is in fastboot mode. Therefore I am unable to install another rom.

Any thoughts on this problem? Thanks in advance.
[Nexus 7 Q&A, Help & Troubleshooting] :
Disable driver signature verification. I forget exactly how to do it but that's how I fixed it. Google search "how to disable driver signature verification windows 8.1" and you'll find it. That way you can get fastboot drivers to work. You should get a Google search result for an XDA page, use that.
[Nexus 7 Q&A, Help & Troubleshooting] sjondenon:
I forgot to mention that I already tried that.

The problem is that my N7 does not send out its identity to my pc. So even though I have the drivers installed, my computer is not able to link them to my tablet.

In my device manager it is shown as: unknown device (device descriptor request failed)

When I try to manually install the drivers for this unknown device, my pc gives an error.
[Nexus 7 Q&A, Help & Troubleshooting] pkandroid:
Hi Guys,

This is my first post on this forum. I'm a proud owner of a Nexus 7 (2012).

However since the Lollipop update, I'm very disappointed with the performance of the device. I use the device as an pdf reader and occasional browsing . So I've decided to go back to Android 4.4 or even 4.3.

I have rooted my device but haven't done anything else. I've installed Chainfire's SuperSU .

My question is can I use Cyanogen's One Click installer after rooting the device??
[Nexus 7 Q&A, Help & Troubleshooting] :
Try this, it's exactly how I got fastboot working on 8.1:

http://xdaforums.com/showthread.php?t=2588979

Install that, the disable driver signature checking.
[Nexus 7 Q&A, Help & Troubleshooting] asap marcus:
Hi ive been having this problem on my nexus 7 for a while. Sound through the speakers is hardly audible and if i put my ear to the speaker its not that loud. I've even had the room dead silent and played audio through the speaker but I still can hardly hear it. I've even just plugged in my headphones without them on and turned up the volume and it was louder than the speakers. Also Im not able to take it back because of how long i've had the tablet
[Nexus 7 Q&A, Help & Troubleshooting] sjondenon:
Already tried that one before. Like I mentioned in my previous post, getting the drivers installed is not the problem. The problem is that my N7 does not send out its ID to the computer so the computer cannot recognize the device and won't link the installed drivers to the tablet. The drivers therefore have to be manually linked to the tablet in the device manager. This does not work however.
[Nexus 7 Q&A, Help & Troubleshooting] lotte67890:
Did you enable USB debugging in developer options?
[Nexus 7 Q&A, Help & Troubleshooting] sjondenon:
The device is bricked and there is no rom installed.
[Nexus 7 Q&A, Help & Troubleshooting] fwayfarer:
late reply but you can get a speaker module replacment for a VERY reasonable price brand new on amazon. i bought one and am very pleased with the results. no more crackling, low volume sound.
[Nexus 7 Q&A, Help & Troubleshooting] asap marcus:
thx
[Nexus 7 Q&A, Help & Troubleshooting] barrack1:
1. How do I tell which roms and kernels are compatible with each other? Usually on other devices, theres a description in the dev thread which says x kernel is to be used on AOSP based roms or something similar. There are many roms/kernels on XDA and I'm wondering which one is more stable since I'm more interested in bug free roms rather than esoteric features.

2. I'm having an issue with slow charging with slimrom kitkat on a grouper (always around 350-4xxmA). This link says that the Kang-aroo kernel supports fast charging among other things and the Timur kernel is popular as well. I didn't see a Kangaroo or Timur kernel thread when I clicked on the 'kernel' option (next to the 'rom'). Is the Kangaroo/Timur kernel too old/deprecated? And is it compatible with slimrom kitkat?
[Nexus 7 Q&A, Help & Troubleshooting] Blackhawx:
Ok guys, I need your help. I bought a Asus Nexus 7 2012 32GB from Amazon this week for around 100€. The device got here today, and I already had several random reboots ( with 4.4.4, 5.0.2, 5.1 stock roms) and it hang up with what I figure to be the most terrible sound the speakers could produce.

Now I really ask myself, was it that good of a deal? As I've seen the device sells for around a hundred bugs on ebay. Would you keep it? Or are there better alternatives for the money? Also, are there roms which actually make this a good device in terms of stabillity and speed? Thanks!
[Nexus 7 Q&A, Help & Troubleshooting] code_311:
I've had my Nexus 7 for a few years and have always had it rooted, running quite a few different roms, and have used several kernels. I am currently running official CM12.1. Any time I try to flash a different Kernel, it bootloops. Clearing cache and dalvik don't help. Only way to fix it is to re-flash CM, then it boots fine. Any ideas what I'm doing wrong?
[Nexus 7 Q&A, Help & Troubleshooting] betexino:
Maybe u get a wrong file or something like that, I'm using MKernel on validus rom no issues :)
[Nexus 7 Q&A, Help & Troubleshooting] motorazrv3:
Maybe you are doing nothing wrong!

Sometimes cm changes things inside the kernel and if you try another kernel that isn't compatible to those changes your nexus will boot loop.

Instead of flashing the whole rom again, why don't you use flashify app and backup your current kernel. It gets saved as an img file. You can use twrp to flash the saved kernel back incase your nexus is boot looping.

You should give it a try.
[Nexus 7 Q&A, Help & Troubleshooting] gorilla p:
I just got this tablet to play with. I have a N4 Mako and am familiar with it.

This setup in XDA is a bit confusing.

I got the N7 2012 GSM

It appears that this is the Tilapia . I see a Nexus 7 3G development section, then a nexus 7 development section, but I see Roms for grouper and tilapia in there.

I'm just confused on what it should be looking for and where.

I'm currently rooted with TWRP recovery
[Nexus 7 Q&A, Help & Troubleshooting] :
You want roms for the 3g, tilapia, wherever you find them.

I'm 87 percent sure you can use grouper roms too... But data likely won't work. :good:

Just take a twrp backup and try them out. Restore the backup if you have issues.
[Nexus 7 Q&A, Help & Troubleshooting] gorilla p:
I'm wondering now which is best for ROM selection, or if it matters.

I ordered my device and it was supposed to be the 3G model, but they sent me the WiFi only model. I was about to send it back, but thought I'd keep it, if it means better ROM support.
[Nexus 7 Q&A, Help & Troubleshooting] seotime91:
Need some help

My nexus 7 is unresponsive to touch except physical buttons, I've tried factory reset and it's is still unresponsive and the notification light is on whether the tablet is on or off.