Can't Install CM12.1, stuck at "Google" screen - Nexus 9 Q&A, Help & Troubleshooting

I'm working with a 32GB WiFi version of the Nexus 9. I've successfully unlocked the device. I believe I've flashed the device with CM 12.1 dated 20151030. When I reboot, the device is stuck at the "Google" screen.
I installed TWRP 2.8.7.1 and copied over the zip files for CM and CGapps, installed again and got the same result.
I've put CM on many devices in the past (Nexus 1, Galaxy Nexus, Nexus 7, Nexus 4, Galaxy S2, Galaxy S3) and I've never had this much trouble. What else can I try?

same here - tried to flash CM12.1 20151030 and 20151029 - both times stuck at "google screen"

Particularly first boot, it takes a good ten minutes to boot up after installing CM. Just be patient.

But the long time is on the flashing logo, isnĀ“t it? Not at the fist google logo... ?
Well - i give it a try.
---------- Post added at 06:21 PM ---------- Previous post was at 05:44 PM ----------
Waited 35 minutes - still stuck at the google logo....

I also waited for about 10 minutes, but that blasted "Google" logo is still there. I would have expected to see the Cyanogenmod logo by that time.

Next try: Flashed CM 12.1 and GApps via Nexus Root Toolkit 2.0.5 - now ROM and GApps work fine.

Same problem here with TWRP 2.8.7.1

How did you do?
ChiefmasterB said:
Next try: Flashed CM 12.1 and GApps via Nexus Root Toolkit 2.0.5 - now ROM and GApps work fine.
Click to expand...
Click to collapse

My tablet had Android Marshmallow installed and the Nexus Root Toolkit (NRT) won't let me use the "Flash zip..." option because no custom boot image is available.
So, I've tried to downgrade to 2 different version of Android using NRT and each time the tablet won't finish booting -- I just see the red, blue, green, and yellow circles spinning around.
Any other suggestions?

I'm in the same position. Flashed CM12.1 RC and the newest gapps 5.1. Everything seems to install correctly in twrp recovery mode and when I hit reboot, it stays on the "Google" screen. I've tried NRT as well with no luck.

In order to succesfully flash CM 12.1 you need to flash the Stock ROM 5.1.1 (LMY47X) the problem seems to be the vendor, as you can read here http://forum.xda-developers.com/nexus-9/orig-development/rom-cyanogenmod-12-0-unnoficial-t3006725
Greets

You can also use Nexus Root Toolkit:
http://www.wugfresh.com/nrt/
Go to advanced utilities - flash zip
Then flash CM12.1
Has worked for me!

finally I installee stock rom 5.1.1 and after that it can boot with CM
Enviado desde mi iPhone utilizando Tapatalk

Related

[Q] [Help needed] S3 mini wont boot into recovery.

Mid year I decided to root and flash Cm 11 onto my little s3 mini (gt-i8190) and everything went great. Recently I read on the Novafusion website that they recommend using TWRP instead of CWM, searched on Google and saw it was safe to flash over custom recoveries. I used Odin to flash over the TWRP I downloaded from the Novafusion site. When odin completed its process my phone rebooted into TWRP and it all seemed fine, then I proceeded to flash the latest version of the Cm 11 4.4.4 rom. Again everything went great and my phone booted up normally.
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[Q] [HELP!] Stuck at ROM logo. (Various ROMs)

Was running Alliance 26 for a long time but Chrome was weird and slow so I figured I'd try out Alliance 27. Flashed Alliance 27 through TWRP recovery and got stuck at the logo. Figured my TWRP might be old so I upgraded from 2.6 to 2.8 and retried the ROM install... still stuck at logo. Then I thought it might be a kernel issue and flashed AGNi's pureSTOCK... still hangs on boot logo. I then tried several different ROMS, LiquidSmooth, DN3, etc. all flash fine but never get past the logo screen.
Anyone have any ideas where to go next?
I got DN3 5.2 to load finally, but it says that my sim card isn't inserted. I don't think my phone is registering as an I605 for some reason. Phone status lists it as something else... an S5 maybe? I'm confused.
[EDIT] Yeah. DN3 is saying my phone is a SM-G900F... Samsung Galaxy 5. Still says missing sim card.
theoldboiler said:
Was running Alliance 26 for a long time but Chrome was weird and slow so I figured I'd try out Alliance 27. Flashed Alliance 27 through TWRP recovery and got stuck at the logo. Figured my TWRP might be old so I upgraded from 2.6 to 2.8 and retried the ROM install... still stuck at logo. Then I thought it might be a kernel issue and flashed AGNi's pureSTOCK... still hangs on boot logo. I then tried several different ROMS, LiquidSmooth, DN3, etc. all flash fine but never get past the logo screen.
Anyone have any ideas where to go next?
Click to expand...
Click to collapse
Hi, quite a few of us are having this same problem. It appears to be several things; I.e. earlier bootloader unlock method and twrp. Try this method: install philz latest recovery. Format for a new install, flash rom. Immediately after (don't reboot) flash agni kernel. note: if it shows the kernel successfully flashed, your good. After, simply reboot and all should boot correctly. As an fyi, if you boot the rom and don't flash the kernel, it will not work. You must reformat and do the sequence above.
Sent from my SCH-I605 using XDA Premium HD app

[Q] Recoveries not flashing?!

Hi, I've had my Z2 tablet for a while now. Soon after opening the box, I had the device rooted and cyanogenmod installed, however, this came with a problem that i have now had for ages, whenever i install or update my CM version, it automatically wipes the recovery i have installed, and installs the crappy CM recovery. I have since tried to flash other recoveries, they say they have worked in Command Prompt, but when i boot into recovery, i am greeted by the Cyanogenmod recovery. Help please!
SGP512 Wifi only, 32GB, CM12 Nightly, latest as of 24th Feb 2015

HammerheadCAF on Google Nexus 5

Hi Guys, I am trying to install CM HammerheadCAF latest nightly build on my nexus 5.
So I flashed recovery TwrpCAF latest version and then flashed hammerheadCAF latest nightly build and i didn't get any error
But when I Selected boot from the TWRPCAF Screen, phone starts and doesn't go beyond a screen with the text "Google" and a unlocked lock logo at the bottom of the screen.
I am not sure what I am doing wrong or what am I missing. I have installed it several times with no luck. Please help. Thanks

Help with BP TOOLS - Boot Only issue

HI
I will cut the long story short - I can only boot through BP TOOLS
Was trying to get Lineage OS flashed - But couldnt
Now after th initial 'M' logo, the phone doesn't go beyond a blank screen - UPDATE - I now have dead Android with the chest open and a red exclamation on it.
i have no clue what is going on.
Can someone please help//
I did a RSD Lite and the screen never went beyond the initial 'm' logo.
EDIT: 1
Very strange behavior -
I RSD Lite the phone again
Then installed BMM (after rooting it of course)
I flashed a couple of ROMs - BUT bootloop
HOWEVER, When I flashed Paranoid Android ROM - 4.4.2 - IT WORKED!
What the hell is going on?
X0LARIUM said:
HI
I will cut the long story short - I can only boot through BP TOOLS
Was trying to get Lineage OS flashed - But couldnt
Now after th initial 'M' logo, the phone doesn't go beyond a blank screen - UPDATE - I now have dead Android with the chest open and a red exclamation on it.
i have no clue what is going on.
Can someone please help//
I did a RSD Lite and the screen never went beyond the initial 'm' logo.
EDIT: 1
Very strange behavior -
I RSD Lite the phone again
Then installed BMM (after rooting it of course)
I flashed a couple of ROMs - BUT bootloop
HOWEVER, When I flashed Paranoid Android ROM - 4.4.2 - IT WORKED!
What the hell is going on?
Click to expand...
Click to collapse
With lollipop and above you need to use safe strap 3.75. reflash with rsd then root then install safe strap. There are two versions of safetrap. One version is by stargo and the other is safe strap for unused partitions. Good luck. If you run into problems just hit me up.
OGdroidster said:
With lollipop and above you need to use safe strap 3.75. reflash with rsd then root then install safe strap. There are two versions of safetrap. One version is by stargo and the other is safe strap for unused partitions. Good luck. If you run into problems just hit me up.
Click to expand...
Click to collapse
Hi. Thanks for your reply. I cant seem to get through SafeStrap no matter what I do.
I can only do the following:
1. RSD Lite - But CANT boot normally. ONLY BP TOOLS
2. Install BMM through BP TOOLS boot
3. Install and successfully boot ONLY 1 ROM - PA for Razr (All other ROMs give me a bootloop)
What I can't do -
1. Boot Normally (without BP TOOLS)
2. flash any ROM - I tried Lineage 14.1 , MIUI, Stock Razr ROM
3. Install SafeStrap - Keep saying Safestrap is deactivated etc
Update 1:
Following the instructions here:
http://www.droidforums.net/threads/how-do-i-install-safestrap-please-help.240178/
I did exactly that and there is progress
I removed BMM the right way, and I installed Safestrap successfully
I even created a slot1
I flashed Lineage OS 14.1 on it...
However, as always, it is stuck on the Lineage OS boot screen - the small circle going on the curved line from right to left
I can never get past this for some weird reason.
Is my download corrupted?
Update 2:
IT WORKED! I am IN!
Lineage OS 14.1!
ITS AWESOME!
Glad to hear you got it working
---------- Post added at 04:26 PM ---------- Previous post was at 04:25 PM ----------
X0LARIUM said:
Hi. Thanks for your reply. I cant seem to get through SafeStrap no matter what I do.
I can only do the following:
1. RSD Lite - But CANT boot normally. ONLY BP TOOLS
2. Install BMM through BP TOOLS boot
3. Install and successfully boot ONLY 1 ROM - PA for Razr (All other ROMs give me a bootloop)
What I can't do -
1. Boot Normally (without BP TOOLS)
2. flash any ROM - I tried Lineage 14.1 , MIUI, Stock Razr ROM
3. Install SafeStrap - Keep saying Safestrap is deactivated etc
Update 1:
Following the instructions here:
http://www.droidforums.net/threads/how-do-i-install-safestrap-please-help.240178/
I did exactly that and there is progress
I removed BMM the right way, and I installed Safestrap successfully
I even created a slot1
I flashed Lineage OS 14.1 on it...
However, as always, it is stuck on the Lineage OS boot screen - the small circle going on the curved line from right to left
I can never get past this for some weird reason.
Is my download corrupted?
Update 2:
IT WORKED! I am IN!
Lineage OS 14.1!
ITS AWESOME!
Click to expand...
Click to collapse
Glad to hear you got it it working
BUT oh well..life is NEVER as straight as that..I should have realised that...
Now, I can't flash any other OS on the Stock Slot. I am stuck with PA. I tried 4 different ROMs. All flash in less than a second and say 'Successful'. When I boot into Stock, its still PA.
Is it because they are BMM compatible and not SS?
X0LARIUM said:
BUT oh well..life is NEVER as straight as that..I should have realised that...
Now, I can't flash any other OS on the Stock Slot. I am stuck with PA. I tried 4 different ROMs. All flash in less than a second and say 'Successful'. When I boot into Stock, its still PA.
Is it because they are BMM compatible and not SS?
Click to expand...
Click to collapse
Are they old ROMs made to flash with bmm?
OGdroidster said:
Are they old ROMs made to flash with bmm?
Click to expand...
Click to collapse
Oh yes...I think so!
Where do I get a Stock Razr ROM - SAFESTRAP version?
X0LARIUM said:
Oh yes...I think so!
Where do I get a Stock Razr ROM - SAFESTRAP version?
Click to expand...
Click to collapse
Just use one of the virtual slots 1, 2, or 3. I use 1.
You have lineage 13 an 14. You also have other ROMs you can use 5.1 and up. You have mokee. You Also have unofficial resurrection remix by transil. Just take a pic and use one or use them all fiddle around some and see which one you like its up to you.

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