[REF] Nexus 7 Button Combinations - Nexus 7 Q&A, Help & Troubleshooting

I don't know if all this info was ever collected into one post; if not, here it is. The times given are approximate times to hold the buttons continuously.
[size=+1]Starting from Device OFF Condition:[/size]
Power (2-3 seconds) -> Normal OS Boot**
Vol-Up + Power (1-3 seconds) -> APX Mode
Vol-Down + Power (6-8 seconds) -> Bootloader/fastboot Mode (keep both buttons pressed until you see the droid lying on his back).
[size=+1]Starting from APX Mode:[/size]
Power (10-15 seconds) -> Normal OS Boot**
[size=+1]Starting from booted or boot-looping OS:[/size]
Power (10-15 seconds) -> Normal OS Boot**
** Bootloader Interrupt: In any of the cases where you hold the power button down to try to break out of the current operating mode, if you press the Vol-Down button right after you first see the black and white screen with the Google logo, the tablet will proceed immediately to bootloader/fastboot mode, rather than booting the normal OS. You need to be ready though - you only get about 1 or 2 seconds to do this! (Thanks to RMXO for pointing this out) Note that this means you can get to the bootloader directly from any other mode!
This also explains why, when attempting a cold start using Vol-Down + Power, if you accidentally let go of the vol-down button when the screen first lights up, the Nexus 7 will boot to the normal OS. In this case, pressing Vol-Down initially is actually superfluous - what makes the device go into bootloader/fastboot mode is the Vol-Down press immediately following the google splash screen - there actually is no unique "Go to fastboot from a cold start" method.
[size=+1]Starting from Bootloader/Fastboot Mode:[/size]
Follow the instructions on-screen.
[size=+1]Starting from Stock Recovery Splash Screen:[/size]
Power + Vol-Up simultaneous press -> gets you to the hidden stock recovery Menu.
For me, pressing Vol-Up first and then Power does not seem to work here - they seem to need to be pressed simultaneously.
[size=+1]Starting from Custom Recovery:[/size]
Follow the instructions on-screen.
[size=+1]Screen Shot in Booted OS[/size]
Press Power + Vol-Down Simultaneously & hold for about 1 second. The simultaneous part seems to be important, as well as holding them down together for the one second or so. A fine example of a simply horrid UI implementation. (Google, can your Grandma perform this trick?)
[size=+1]Safe Mode Boot[/size]
From a cold start boot (press & release Power button), wait 2 seconds after the B&W Google (bootloader) splash screen appears, then press and hold Vol-Down button until the normal OS boot is fully completed (lock screen or home screen appears)
[size=+1]Discussion.[/size]
1) These results can depend on the bootloader version; I tested all of the above on the v4.13 bootloader under the following scenarios: (a) unlocked bootloader and custom recovery, (b) unlocked bootloader and the JOP40D stock recovery, and (c) locked bootloader and JOP40D stock recovery. I noted no differences in button-press responses due to these different configurations.
2) Note that in APX mode, there are absolutely no indications on the screen that the device is actually turned on. The ONLY way to see this is to plug it in to a computer, and you will see/hear the device insertion. I am able to enter APX mode without being plugged in, and then afterwards plug into the PC, or cold start it into APX mode plugged in to the PC at cold-boot. If I unplug the tablet in APX mode and then attempt a re-insert, Win 8 is unhappy with the device.
3) If you are stuck in a bootloop pay special attention to the Bootloader Interrupt note above - this is how you get out of a bootloop and into the bootloader or recovery!
4) The JOP40D Stock Recovery has a two minute (120 sec) timer running - if you do not progress to the (hidden) menu within this time, an automatic boot to the regular OS will occur.
[size=+1]Bonus Info: USB Device IDs in each mode[/size]
Bootloader/Fastboot Mode:
USB\VID_18D1&PID_4E40&REV_0000 (Android Phone -> Android Bootloader Interface)
USB\VID_18D1&PID_4E40
Stock OS, ADB Debugging Off, PTP Storage
USB\VID_18D1&PID_4E43&REV_9999 (Portable Devices -> Nexus 7 ) ["PTP"]
USB\VID_18D1&PID_4E43
Stock OS, ADB Debugging Off, MTP Storage
USB\VID_18D1&PID_4E41&REV_9999 (Android Phone -> Android ADB Interface)
USB\VID_18D1&PID_4E41
(Note: MTP Seems to need to have ADB Debugging enabled - 4.2.1/JOP40D)
Stock OS, ADB Debugging ON:
USB\VID_18D1&PID_4E42&REV_9999&MI_01 (Android Phone -> Android Composite ADB Int)
USB\VID_18D1&PID_4E42&MI_01
(when in MTP storage mode)
USB\VID_18D1&PID_4E42&REV_9999&MI_00 (Portable Devices -> Nexus 7 ) ["MTP"]
USB\VID_18D1&PID_4E42&MI_00
(when in PTP storage mode)
USB\VID_18D1&PID_4E44&REV_9999&MI_00 (Portable Devices -> Nexus 7 ) ["PTP"]
USB\VID_18D1&PID_4E44&MI_00
APX Mode:
USB\VID_0955&PID_7330&REV_0103 (Other Devices -> APX)
USB\VID_0955&PID_7330
Custom Recovery - TWRP 2.3.3.0
USB\VID_18D1&PID_D001&REV_9999 (Android Phone -> ?varies? )
USB\VID_18D1&PID_D001
If you are aware of other escape sequences using the physical buttons to navigate through different device modes, or differences in these behaviors in earlier bootloader revisions, let me know.
Revision History
---------------------------------------------------------------------------------
2013-02-04 Initial Revision
2013-02-08 Added USB Bus Hardware IDs for PTP mode
2013-03-29 Added Safe Mode

Related

[Q] Slower to start? (10-15s Power button hold to boot up)

Since i flashed TWRP "2.3.1.1 grouper" for my Nexus 7, on the Recovery partition (for some reasons it didn't had a Recovery software installed anymore), it seem like i have to hold the Power button for 10-15 seconds before the Google logo show up on the screen. Before that, i only had to hold Power button for about 2-3 seconds (default Power button holding time).
At first i was freaking out, thinking i corrupted something by flashing this and the device just refused to boot up. But then i thought "let's see if the tablet boot up if i hold the Power button long enough"
Why is it doing that suddenly? Is there a way i can shorten this?
infos:
-i have Glazed Jelly Bean 2.1 installed
-i used WugFresh's tools to flash TWRP, while i selected "Custom ROM - JB" in the Android version.
-i changed my boot animation using ROM Toolbox Pro (i don't think it cause the problem, as it was booting just fine before)
strange, when i enable Debugging, i just have to hold it for 3-4 seconds (normal). When Debugging is off, i have to hold it for about 15 seconds. Any idea why?
Do you always leave your Debugging feature on? it seem like it only give access to other hidden folders you wouldn't see normally, on your PC.

[GUIDE] Entering ADB/Fastboot/APX mode instructions

I wrote this awhile back to provide known methods to enter each of these modes. I know it's rather wordy, but may help those that are newer to all this. See the link below for a more concise write-up. I'll try to keep this updated with any corrections and/or new methods and feedback is very welcome.
How To Enter APX, Fastboot Mode and Recovery menu​
Special thanks goes out to tobdaryl for providing the foundation for this guide and to daws for
providing a previously unknown method (USB cable plug in while tablet is turned off).​
Pertinent links:
The methods below written more concisely by tobdaryl: How to enter APX mode or Bootloader-recovery menu
Universal Naked Drivers (for APX/ADB/Fastboot modes): [ADB/FB/APX Driver] Universal Naked Driver 0.72
To install the SDK tools & drivers in Windows 7 (and other versions?): [HOWTO] Install Google SDK and ADB drivers...
The following instructions are written on how to enter APX mode. To enter Fastboot and Recovery modes, simply follow the same instructions but use the Volume Down button. Once the message: "Checking for RCK.. press key <Vol_Up> in 5 sec to enter RCK" is displayed, follow the displayed instructions to enter the desired mode. Note: The screen remains blank in APX mode.
When your tablet is turned off, to enter APX mode:
Make sure your USB cable is connected to your tablet and PC. While pressing the Volume Up button, press the Power button for a few seconds, and then release both buttons.
Make sure the USB cable is not plugged into your tablet (but is connected to your PC). While pressing the Volume Up button, plug the USB cable into your tablet. Release the Volume Up button after a few seconds (modified from daws' suggested method).
When your tablet is up and running, to enter APX mode:
Turn your tablet off and wait a few seconds. Connect your USB cable to your tablet and PC. While pressing the Volume Up button, press the Power button for a few seconds, and then release both buttons.
Make sure your USB cable is connected to your tablet and PC. Open a command prompt on your PC, navigate to the folder containing adb.exe, type: adb reboot and hit the Enter key while holding down the Volume Up button until the screen remains blank for a few seconds.
From a tablet based terminal emulator, type: su and hit the Enter key, then type: reboot and hit the Enter key while holding down the Volume Up button until the screen remains blank for a few seconds. One suggested app (by tobdaryl) is the free Android Terminal Emulator from Google Play. Note: You must be rooted for this to work.
Press the tablet reset with a paperclip while pressing the Volume Up button until the screen remains blank for a few seconds (the reset is located about either 25mm or 1" below the sdcard slot). Note: Do not press hard!
When your tablet is in Fastboot mode, to enter APX mode:
While pressing the Volume Up button, press the Power button for 10 seconds. Release both buttons a few seconds after the screen goes blank. One variation is to wait and press the Volume Up button immediately after the screen goes blank and then release it after a few seconds. If you wait too long to press the Volume Up button, your tablet will just boot up normally.
Make sure your tablet has the USB cable connected to your PC. Open a command prompt on your PC, navigate to the folder containing fastboot.exe, type: fastboot -i 0x0B05 reboot and hit the Enter key while holding down the Volume Up button until the screen remains blank for a few seconds. One variation is to wait and press the Volume Up button immediately after the screen goes blank and then release it after a few seconds. If you wait too long to press the Volume Up button, your tablet will just boot up normally. Note: Newer versions of fastboot.exe do not require the "-i 0x0B05" option.
Or, as a last resort!
Remove your tablet's cover, disconnect the battery, press and hold the volume up button, and reconnect the battery!
The following instructions are written on how to switch from one mode to another (not covered above).
When your tablet is up and running, to enter Fastboot or Recovery mode:
Make sure your USB cable is connected to your tablet and PC. Open a command prompt on your PC, navigate to the folder containing adb.exe, type: adb reboot-bootloader and hit the Enter key. Once the message: "Checking for RCK.. press key <Vol_Up> in 5 sec to enter RCK" is displayed, follow the displayed instructions to enter the desired mode. Note: I was unable to verify this method possibly due to having the AndroidRoot.mobi custom bootloader. This method only performs a regular reboot for me.
From a tablet based terminal emulator, type: su and hit the Enter key, then type: reboot bootloader and hit the Enter key. Once the message: "Checking for RCK.. press key <Vol_Up> in 5 sec to enter RCK" is displayed, follow the displayed instructions to enter the desired mode. One suggested app (by tobdaryl) is the free Android Terminal Emulator from Google Play. Note: You must be rooted for this to work, Note2: I was unable to verify this method possibly due to having the AndroidRoot.mobi custom bootloader. This method only performs a regular reboot for me.
When your tablet is in APX mode, to enter Fastboot or Recovery mode:
While pressing the Volume Down button, press the Power button for 10 seconds. Release both buttons a few seconds after the screen goes blank. One variation is to wait and press the Volume Up button immediately after the screen goes blank and then release it after a few seconds. If you wait too long to press the Volume Up button, your tablet will just boot up normally. Once the message: "Checking for RCK.. press key <Vol_Up> in 5 sec to enter RCK" is displayed, follow the displayed instructions to enter the desired mode.
When your tablet is in Fastboot mode, to enter Recovery mode:
Make sure your tablet has the USB cable connected to your PC. Open a command prompt on your PC, navigate to the folder containing fastboot.exe, type: fastboot -i 0x0B05 reboot-bootloader and hit the Enter key. Once the message: "Checking for RCK.. press key <Vol_Up> in 5 sec to enter RCK" is displayed, press the Volume Up button within 5 seconds. Note: Newer versions of fastboot.exe do not require the "-i 0x0B05" option, Note2: I was unable to verify this method possibly due to having the AndroidRoot.mobi custom bootloader. This method only performs a regular reboot for me.
When your tablet is in Recovery mode (TWRP v2.3.x), to enter Fastboot mode:
Select the "Reboot" option and then select the "System" option while pressing the Volume Down button until the screen remains blank for a few seconds. Once the message: "Checking for RCK.. press key <Vol_Up> in 5 sec to enter RCK" is displayed, wait 5 seconds for the icons to appear, and follow the instructions to select/confirm fastboot mode. One variation is to wait and press the Volume Down button immediately after the screen goes blank and then release it after a few seconds. If you wait too long to press the Volume Down button, your tablet will just boot up normally.
When your tablet is in Recovery mode (TWRP v2.3.x), to enter APX mode:
Select the "Reboot" option and then select the "System" option while holding down the Volume Up button until the screen remains blank for a few seconds. One variation is to wait and press the Volume Up button immediately after the screen goes blank and then release it after a few seconds. If you wait too long to press the Volume Up button, your tablet will just boot up normally.
Nice guide! Thanks for taking the time to gather the information and create this guide.
It is clear, detailed, and easy to follow.
It should be a stickied.
Hi I tried connecting my device to my computer after holding down the buttons to get into APX mode. And after about 5 seconds I heard a connection sound then Windows told me the USB device malfuntioned. Any idea why?? I'm trying to fixed my friend's soft bricked tablet which cannot get into fastboot mode.
firtvid20 said:
Hi I tried connecting my device to my computer after holding down the buttons to get into APX mode. And after about 5 seconds I heard a connection sound then Windows told me the USB device malfuntioned. Any idea why?? I'm trying to fixed my friend's soft bricked tablet which cannot get into fastboot mode.
Click to expand...
Click to collapse
A couple of quick thoughts if it's not the device itself: check to make sure the cable is good, try a different USB port, and try re-installing the drivers (using the Universal Naked drivers, specifically the APX one included in the package). I've had troubles on one pc where it would connect and disconnect - it was either the USB port acting flaky or the OEM cable I was using...
Watching Windows device manager, is it showing it as an APX device or something else before it disconnects? Also, what kind of error?
Hopefully some others may have added suggestions...good luck!
wha2do said:
A couple of quick thoughts if it's not the device itself: check to make sure the cable is good, try a different USB port, and try re-installing the drivers (using the Universal Naked drivers, specifically the APX one included in the package). I've had troubles on one pc where it would connect and disconnect - it was either the USB port acting flaky or the OEM cable I was using...
Watching Windows device manager, is it showing it as an APX device or something else before it disconnects? Also, what kind of error?
Hopefully some others may have added suggestions...good luck!
Click to expand...
Click to collapse
Ah I seemed to fix it when I held down the volume button while the tablet was off and plugged it in. Thanks for the help!
firtvid20 said:
Ah I seemed to fix it when I held down the volume button while the tablet was off and plugged it in. Thanks for the help!
Click to expand...
Click to collapse
No problem at all and glad to hear it wasn't a complicated fix! With APX and other modes, do have the two methods. Holding both buttons at same time, but I do find somehow it doesn't always recognize them (maybe I'm not holding the volume button solidly?). As worked for you, the other option is to have it powered off, hold the volume button, and then plugging it in to get it to power on and go into APX mode (remembering it's just a black screen but can tell by checking Windows device manager - mostly mentioned for any others that may come across this!).
If have more questions on the rest of the restore process, might be good to start a fresh post for the remaining steps. Good luck with getting it back up and going!
Hi @wha2do,
This morning I followed a guide written years ago instructing "-i 0x0B05" as part of a fastboot flash, which was a problem considering I used the latest fastboot available ...
Thanks to your guide, I removed that portion and it worked like a charm. Thank you man
cristobal.digital said:
Hi @wha2do,
This morning I followed a guide written years ago instructing "-i 0x0B05" as part of a fastboot flash, which was a problem considering I used the latest fastboot available ...
Thanks to your guide, I removed that portion and it worked like a charm. Thank you man
Click to expand...
Click to collapse
Whew, it hit me how long ago that was posted, but glad to hear it helped! I def appreciate the post

[Q] PowerON + VolUP + VolDown does not work on my N7 3G

If powered off, pressing together PowerON + VolUP + VolDown does not power on my N7 3G to bootloader. It gives no response.
After releasing this combination, I have to long press PowerON to power on the N7 3G, as it cannot power on properly.
However, PowerON + VolDown does work, this combination boots my N7 3G to bootloader. It is strange...
Also, after flashing recovery, I tried to make it permanent by
Code:
mv recovery-from-boot.p recovery-from-boot.bak
However, it said "no such files".
I tried to "ls" and could not find anything like "recovery-from-boot.p" and "recovery-from-boot.bak"
But the recovery does stick...not sure why
(I used recovery-CWM-touch-6.0.2.3-tilapia.img)
human-being said:
If powered off, pressing together PowerON + VolUP + VolDown does not power on my N7 3G to bootloader. It gives no response.
After releasing this combination, I have to long press PowerON to power on the N7 3G, as it cannot power on properly.
However, PowerON + VolDown does work, this combination boots my N7 3G to bootloader. It is strange...
Click to expand...
Click to collapse
AFAIK, there is no such button combination Pwr+Vup+Vdwn.
What is happening is that you are putting the tablet into APX mode with Pwr+Vup
Once it goes into APX mode, it takes 13 sec of holding Pwr down continuously to cause a reset to occur. It takes another 3-5 seconds after this before the bootloader splash screen shows up.
If you continue to hold down the power button, and press Vdwn within 1 second (be ready for it!) of the bootloader splash screen (B&W Google logo in center of screen + unlocked padlock image at bottom if the bootloader is unlocked) appearing on the screen, the tablet will go to fastboot mode.
If you miss that short-lived opportunity the bootloader will attempt to boot the image in the boot partition (LNX); which is to say: a normal OS boot.
In general you can always force a reboot by holding the power button down long enough (no matter what mode the tablet is in!) - and if you have Pwr+Vdwn pressed within one second of that bootloader splash screen appearing, the bootloader will go into fastboot mode rather than attempting a normal boot.
[REF] Nexus 7 Button Combinations
bftb0 said:
AFAIK, there is no such button combination Pwr+Vup+Vdwn.
What is happening is that you are putting the tablet into APX mode with Pwr+Vup
Once it goes into APX mode, it takes 13 sec of holding Pwr down continuously to cause a reset to occur. It takes another 3-5 seconds after this before the bootloader splash screen shows up.
If you continue to hold down the power button, and press Vdwn within 1 second (be ready for it!) of the bootloader splash screen (B&W Google logo in center of screen + unlocked padlock image at bottom if the bootloader is unlocked) appearing on the screen, the tablet will go to fastboot mode.
If you miss that short-lived opportunity the bootloader will attempt to boot the image in the boot partition (LNX); which is to say: a normal OS boot.
In general you can always force a reboot by holding the power button down long enough (no matter what mode the tablet is in!) - and if you have Pwr+Vdwn pressed within one second of that bootloader splash screen appearing, the bootloader will go into fastboot mode rather than attempting a normal boot.
[REF] Nexus 7 Button Combinations
Click to expand...
Click to collapse
Thanks for point this out.
It is strange that many tutorials which I read are having instructions saying this combination can bring your N7 to bootloader. That's why I got confused.

Im lost

was trying to root my lg stylo 2 Walmart family mobile(t-mobile) and i unlocked the bootloader and installed twrp but it just says no command when i boot into recovery.
Then you didn't flash the recovery properly, it's fairly simple. If you're able to get fastboot (shut off the phone totally, hold Volume Down and plug in the USB cable attached to a computer, it should go into fastboot mode almost instantly, if not then there's an issue someplace).
After that using fastboot with the recovery img file for TWRP:
Code:
fastboot flash recovery (recovery_file).img
Wait, if it says flashing successful then before you do anything else, type the following:
Code:
fastboot reboot (but do NOT press Enter yet)
Get the phone in your hand, still connected to the USB cable, and get your fingers on the Volume Down + Power button but don't put them just yet. Carefully tap the Enter key with a pinky or something to trigger the device reboot, press and hold Volume Down + Power till you see the LG logo, let Power go for a split second (still holding Volume Down) then press Power again and hold it till TWRP loads.
If that doesn't work - and I've done that hundreds of times - there's something going on with your device, perhaps the bootloader isn't truly unlocked - that checkbox in Developer Options doesn't mean it's unlocked, it just means it can be.
Ensure you followed this: https://docs.google.com/document/d/1xRfGs-w2R_54IB8cVtIj3FTmm5GY0W1Yv4SqDhVHZ-Q/edit?usp=sharing
there's a video tutorial floating around here somwhere

[GUIDE] Booting your OnePlus X with a broken power button

Got a broken power button and need to turn on your OnePlus X?
As long as one of your volume buttons and your microUSB port still work, you're lucky.
If the volume down button is working:
1. Press and hold the volume down button.
2. Connect to a USB power source.
3. The phone should vibrate and boot into the recovery. You can release the volume button at that point.
4. If you have the stock OnePlus recovery installed just tap "English", "Exit" (if present), then "Reboot".
5. Your phone should now boot up!
If only the volume up button is working, things get a bit tricky.
Before you start, read through all of the steps and the paragraph below to make sure this goes as smooth as possible.
1. Connect your device to a USB power source without pressing any button.
2. Wait for about half a second, then press and hold the volume up button.
3. If you've hit the right moment, your device will boot to fastboot mode.
4. Connect to a PC and run the command "fastboot reboot".
(If you don't know what fastboot is or you haven't set it up yet you should be able to find plenty of guides online.)
A word of caution on finding the right moment to hit the volume button:
Start with longer delays and work from there. If you hit the volume up button too early the phone will enter EDL mode, which can be hard or annoying to get out of. EDL is Qualcomm's low-level Emergency Download Mode which allows flashing the device.
When entering EDL mode the phone won't vibrate and the screen will stay off. The phone remains in EDL mode after disconnecting the USB plug.
Normally you could press and hold the power button until a hard reset to get out of there, but in this case you have the following options:
- Unplug the battery to power down the device completely if your device happens to be open.
- Wait? For as long as it takes for your device to reset from this mode on its own or for the battery to run out. idk, good luck.
- Use an EDL mode flashing tool on a PC to send the power reset command to your device. This could be viable if you have already used such a tool before, e.g. by following the "Mega UnBrick Guide" by Naman Bhalla. Alternatively you could dive into this cross platform command-line tool, which works on WIndows, Linux and macOS. Using this approach is a bit overkill and quite the tangent from what you're actually trying to do, but being able to make use of EDL can come in handy in other situations as well when you're tinkering with your Android device so taking that detour might just be worth the time.
Awesome, it worked for me.
-Incase you have entered into EDL mode, then continue charging your mobile, it will be back to old state after sometime (12 hours maybe).
- To get fastboot mode, first insert power cable then wait for vibration/ screen light illumination after that press volume up button. if you press volume up button before inserting power cable, then it will go to EDL mode, so be careful about it.

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