Database Users

Can no longer connect via adb

Now I know your first thought “I bet this tool didn’t even use Search like the rest of the shlubs on here”. Well you are mistaken. I have not only searched xda but even tried Google and Yahoo (just in case) as well. I have found numerous posts (like HERE and HERE and many others) with similar situations but haven’t seen a resolution. Here is the rundown:
Running JF’s 1.5 CRB21 ROM
Hard SPL (HSPL10.95.3000)
JF’s 1.43 Recovery Image
SDK 1.5_r1
Fastboot.exe placed in System32
Haykuro’s Updated Drivers placed in System32
Windows XP 2002 SP3
I have been able to flash nandroid backups without issue in the past but adb started intermittently not recognizing my phone when I flashed from JF’s RC33 to JF’s 1.5. I was able to restore a backup once but now adb will not recognize my phone at ALL. Tried different USB plugs and cables with no result. If I mount the phone to view the SD card via Windows Explorer it shows as “HTC Dream Composite ADB Interface” in Device Manager. However if I boot into the Bootloader (which I have the Hard SPL HSPL10.95.3000) , connect via USB, hit back to go into Fastboot, and try to flash a nandroid backup I get "Waiting on Device" infinitely. “Adb shell” yields “Device Not Found”. The "adb devices" command yields a blank list. But if I type "Fastboot Reboot" it will reboot the phone so I know it is communicating and the cable is in good order. I have deleted my SDK and drivers and re-downloaded/installed them and STILL cannot get adb to connect. It has to be something simple I am missing here right? Any idea why this would have worked without issue in the past and now not at all? Could it have been a Windows Security update? (That's about the only thing I can thing that has changed other than the newer ROM)
Thank you for your help.

Did you update you USB Drivers or try reloading them?

Also.... Settings > Applications > Development > USB debugging has to be checked....
and stop being a tool.
nah im jk.

USB Debugging is checked - thanks Senorkabob for at least trying to help.
Phoenix - I apologize for posting in the wrong place. If I could move it, I would. I apparently missed the "How to be a Good Xda Citizen" thread... I shall repent

Could you choose View -> "Devices by Connections" in Device Manager and uninstall the USB Root Hub device your android is connected to. This should clean up all the device nodes and allow you a clean start. Click "Scan for hardware changes" in the toolbar and wait for the system to detect your phone. In the new hardware detected wizard, make sure you specify the path to drivers folder of the correct architecture, i.e. x86 or x64.

gPhunk said:
USB Debugging is checked - thanks Senorkabob for at least trying to help.
Phoenix - I apologize for posting in the wrong place. If I could move it, I would. I apparently missed the "How to be a Good Xda Citizen" thread... I shall repent
Click to expand...
Click to collapse
Repent .. Repent..
Did reloading the USB Driver work?.. Did for me =)

billc.cn said:
Could you choose View -> "Devices by Connections" in Device Manager and uninstall the USB Root Hub device your android is connected to. This should clean up all the device nodes and allow you a clean start. Click "Scan for hardware changes" in the toolbar and wait for the system to detect your phone. In the new hardware detected wizard, make sure you specify the path to drivers folder of the correct architecture, i.e. x86 or x64.
Click to expand...
Click to collapse
How do I know which one to install? (I am running Vista Home Premium 32bit)
Thank you for your help

Use the x86 drivers. Also try installing them in safe mode. That made it work for me

ubernicholi said:
Use the x86 drivers. Also try installing them in safe mode. That made it work for me
Click to expand...
Click to collapse
Thanks man - I was able to install the drivers but am still unable to view my device. It shows as "HTC Dream" in Device Manager but when I run "adb devices" in the command line, it yields a blank list. Further commands (I.e. adb shell) say "cannot find device. Running fastboot commands result in "waiting on device". This happens on both my laptop and my home pc so I am beginning to think it's the phone. Should I have something loaded on the phone? I have USB Debugging checked so that's not it. Any ideas?

possibly the problem is that ADB does not work in Bootloader mode, it is designed to work while the phone is running.
However if I boot into the Bootloader (which I have the Hard SPL HSPL10.95.3000) , connect via USB, hit back to go into Fastboot, and try to flash a nandroid backup I get "Waiting on Device" infinitely. “Adb shell” yields “Device Not Found”. The "adb devices" command yields a blank list. But if I type "Fastboot Reboot" it will reboot the phone so I know it is communicating and the cable is in good order.
Click to expand...
Click to collapse
Yuo are obviously trying this in bootloader mode, underline for emphasis.
try >fastboot devices
see if that shows you your phone
Otherwise try ADB while in the OS already.

ADB does not find device

Hi all,
I've searched the forums (honestly), but I can't find an answer to my problem.
I have a Vodafone branded 32B phone.
I installed the AndroidSDK as supposed to, added the path, made the phone root, booted into the recovery console using fastboot and flashed my phone with different operating systems... but during all this time I hever got ADB to work.
Whatever I do, adb never finds the phone. Fastboot works and finds it, when it's in fastboot mode, but ADB never. So, I can't permanently install the recovery console nor do any of the other funky stuff.
ADB doesn't work when the phone is in fastboot mode nor normally operating. I have USB Debugging turned on. The phone works normally and I can access the SDCard just fine.
Any help?

Suggestion.
Look into purchasing a G1 to be kept as a spare and used for development. That's what I've done with my G1. GParted is within most recovery images nowadays, therefore you can do most anything there, well...important functions that is. Keep that in mind.
You might need to uninstall the driver that recognizes your phone, then manually install the updated driver.

Reignzone said:
You might need to uninstall the driver that recognizes your phone, then manually install the updated driver.
Click to expand...
Click to collapse
that's what i had to do to get it to recognise my phone.
i'm pretty sure the driver came with SDK. either way i've attached the one i used.
go into device manager and update the driver it's currently using with the attached one.

Incorrect driver.
It should be the 1st driver listed in the Android SDK file.
As far as I know, you could also choose to push ADB to your system32 file folder under the C: drive in your computer. That is if you're using a Windows machine.

just a thought
Are you on windows or linux? If you're in ubuntu try sudo adb ... the default unprivilaged user doesnt automatically have access to the device.
If you're in Windows I would uninstall the Android Phone device in device manager and reboot with the phone disconnected. Then connect it and install the usb driver from the sdk when prompted. Might also pay to download the sdk again.

Install HTC Sync
Another known way to fix the issue is to download and install HTC Sync http://www.htc.com/au/SupportViewNews.aspx?dl_id=573&news_id=169
This seems to install the correct drivers
For more info check the Wiki:
http://wiki.xda-developers.com/index.php?pagename=HTC_Sapphire_Hacking#sec02

Hey Guys,
Forgot to mention I'm on Windows Vista 64 bits.
That last suggestion did the trick. I went to the site and downloaded the HTCDriverUpdate_Vista_64bits.exe, and within seconds I had an ADB connection.
Thanks for your help!

[Q] ADB not recognizing, please help

Okay, I have a permarooted MT4G with S=Off, and I want to use the gfree method to unlock my SIM and get the universal CID while I'm still on the stock kernel. All of the guides I see for that push the gfree files using the ADB.
Problem: I cannot get the Android SDK to recognize my MyTouch 4g. (SEE UPDATE)
I followed this guide http://forum.xda-developers.com/showthread.php?t=834748 to try and set up the ADB to no avail. This is what I did:
-- Downloaded the SDK, booted it up, let it update. Booted it up again, let it update EVERYTHING (took like 30 minutes) again. It has no more updates to install.
-- I tried adding adb as an environmental variable in windows, but the command prompt, no matter where I start it from, does not recognize 'adb' as "an internal or external command, operable program, or batch file." (works now)
-- The HTC Drivers that came with my device have been installed on my computer. So, I uninstalled them, only to have windows reinstall them as soon as I plug the device in (I'm running Windows 7 x64 home edition, Build 7601).
I tried going here http://forums.t-mobile.com/t5/HTC/HOW-TO-Get-ADB-to-recognize-your-myTouch-4G/m-p/540017 and using their technique, no dice. My computer has the exact same drivers as when I started, and I have a digital paperweight of a SDK. (see update)
UPDATE: I now have a working ADB (big thanks to TrueBlue_Drew and his guide for us noobs) that recognizes my MT4G, but I have another issue:
FINAL QUESTION: Now that my MT4G is showing up in ADB, I realized I screwed up again when I discovered a "Android 1.0" item in the misc. section of my Devices window in Control Panel. It currently says that Android 1.0 needs troubleshooting and the drivers aren't working. I tried to direct windows to the usb drivers I downloaded from the both of the guides I've used, but windows wouldn't accept either one. Am I using the wrong drivers? Which ones should I tell windows to install? Should I even worry about it since adb is working? Any help on that end would VERY MUCH appreciated.

If you are using true blues method are you changing your target folder to c:\adb?
Sent from my HTC Glacier using Tapatalk

neidlinger said:
If you are using true blues method are you changing your target folder to c:\adb?
Sent from my HTC Glacier using Tapatalk
Click to expand...
Click to collapse
Do you mean the target of the environmental variable? If so, then no, because the name of the folder is android-sdk-windows, making the target C:/android-sdk-windows/tools, unless I'm totally off-base, which is probably what's happening.
Still, I don't think the target is C:\adb, cause I don't have anything in the root of my C drive that's named adb

corruptsmurf said:
Do you mean the target of the environmental variable? If so, then no, because the name of the folder is android-sdk-windows, making the target C:/android-sdk-windows/tools, unless I'm totally off-base, which is probably what's happening.
Still, I don't think the target is C:\adb, cause I don't have anything in the root of my C drive that's named adb
Click to expand...
Click to collapse
Is the adb.exe file in your tools folder? Also you should change the name of your SDK folder just so that its easier to type in the terminal. I made mine simply ANDROIDSDK.
Sent from my HTC Glacier using XDA App

Have you installed the drivers successfully? Here's what I do and it's worked on multiple computers and on both Windows 7 and XP:
- Install SDK
- Turn on USB Debugging on the phone.
- Plug the phone into the computer and let it try to install some stuff. Ignore any dialogs saying there were errors
- Mount the SD card and run the HTCDriver.exe file that came on the sd card when you got the phone.
- Unplug it from the computer and plug it in again.
- Open a command prompt and navigate to the tools subfolder of the android sdk. Run adb devices. (Even if the first time doesn't return your device's serial number, it should say that it's installing more drivers. Once that completes, adb devices should return your S/N and you should be good to go.)

So close, yet...
TJBunch1228 said:
Is the adb.exe file in your tools folder? Also you should change the name of your SDK folder just so that its easier to type in the terminal. I made mine simply ANDROIDSDK.
Sent from my HTC Glacier using XDA App
Click to expand...
Click to collapse
Actually no, adb.exe isn't It has a .txt named "Adb has moved," not really sure how to proceed from here; I downloaded the SDK that was in the topic I linked above, and just allowed it to update. More below, and thanks for the response.
jdkoren said:
Have you installed the drivers successfully? Here's what I do and it's worked on multiple computers and on both Windows 7 and XP:
- Install SDK
- Turn on USB Debugging on the phone.
- Plug the phone into the computer and let it try to install some stuff. Ignore any dialogs saying there were errors
- Mount the SD card and run the HTCDriver.exe file that came on the sd card when you got the phone.
- Unplug it from the computer and plug it in again.
- Open a command prompt and navigate to the tools subfolder of the android sdk. Run adb devices. (Even if the first time doesn't return your device's serial number, it should say that it's installing more drivers. Once that completes, adb devices should return your S/N and you should be good to go.)
Click to expand...
Click to collapse
Yeah, the problem is that my PC doesn't list any errors when I plug it in. BUT BIG NEWS, I followed the ADB for noobs guide (http://forum.xda-developers.com/showthread.php?t=928370), and I realized, as I said above, that my adb.exe file was nowhere to be found, so I used the one from the noob guide, and it could recognize my device in ADB. BUT it could not recognize my device in fastboot, so after much frustration, I decided to uninstall the drivers and reinstall using pda.net. Whatever it did, it worked, because adb and fastboot both show my serial number under devices. Thanks to the both of you for your help.
FINAL QUESTION: Now that my MT4G is showing up in ADB, I realized I screwed up again when I discovered a "Android 1.0" item in the Misc. section of my Devices window in Control Panel. It currently says that Android 1.0 needs troubleshooting and the drivers aren't working. I tried to direct it to the usb drivers listed in the both of the guides listed above, but windows wouldn't have it. Am I using the wrong drivers? Which ones should I tell windows to install? Should I even worry about it since I can use adb anyhow? Any help on that end would VERY MUCH appreciated.

[Q] Lost device trying new 6.3 root

Following the steps from the thread http://forum.xda-developers.com/showthread.php?p=24124828#post24124828, I lost my device on fastboot command (I followed correctly all the steps).
The device freezes on the startup screen and the PC can't recognize it properly. So the next fastboot command stays awaiting the device indefinetly.
The Android ADB Interface still remains untouchable on devices panel, but as an unspecified device. So, Windows doesn't mount the internal storage and consequently it is apparently impossible to change the damages.
Does anyone know something that can be useful?

install the correct drivers for fastboot and go ahead:
http://forum.xda-developers.com/showpost.php?p=22342376&postcount=6

i had the same problem
used this link helped get my device up again
http://forum.xda-developers.com/showthread.php?t=1422832

No ADB mode, driver issue?

I'm Italian, sorry for my English.
A few days ago I unlocked the bootloader via Toolkit, rooted and flashed the TWRP recovery _.
But I had hard difficulty:
After driver installed, I unlocked bootloader, enable debugging and then NOTHING!
In practice, the N7 was recognized by windows 7 64bit only in FastReboot mode ..
I tried in every way possible, deleted and reinstalled the driver 50 times, restored windows to a previous point, installed the drivers manually tried without toolkit, but how ADB just do not want to know.
For hours I was still with the bootloader unlocked but without root, until came to my rescue a friend with another notebook but same windows 7 64. Load the Toolkit, install the drivers and everything goes perfectly, I do everything in 5 minutes.
On my laptop there is always the issue driver ADB, in the future I still need my PC recognized the N7 in ADB, how can I do?

One thing that I think is not well understood is that there is no "Generic Class Driver" for ADB nor for fastboot...
... even though the very driver that works for one mode (or phone/tablet device) may be perfectly fine with a different device. The wire protocol for both fastboot and adb are extremely simplistic.
So, what that means is that if the Hardware ID used by the USB device endpoint registers on the bus with a different VendorID/ProductID, Windows will (correctly) not use a previously-installed ADB driver, or previously installed fastboot driver - even though they would probably work just fine.
Here is an example. The Nexus 7 registers the following Hardware ID when ADB debugging is turned on in the OS:
USB\VID_18D1&PID_4E42&REV_9999&MI_01
USB\VID_18D1&PID_4E42&MI_01
On the other hand, if you are using TWRP, it's adbd daemon shows up on the PC as:
USB\VID_18D1&PID_D001&REV_9999
USB\VID_18D1&PID_D001
This means that you might need to install a different driver for using the ADB with the OS, and a different driver for ADB under TWRP - even though it is exactly the same hardware on the other end of the cable! In the absence of a generic class driver for a given USB endpoint, Windows tries to match drivers in it's local (& internet) database based on this VID/PID pair.
If you have a look at the [ADB/FB/APX Driver] Universal Naked Driver 0.72 thread - and download it and have a look at it's included "android_winusb.inf" file - you will see literally hundred of different VID/PID pairs in the driver's android_winusb.inf file in the installer package, corresponding to many hundreds of phones/tablets. Same driver with hundreds of devices listed as compatible.
In the past I recall taking the Google (SDK) USB driver, and manually editing into place matching VID/PID pairs for a HTC phone into the .inf file. It worked perfectly; I probably flashed that phone hundreds if not thousands of times using the Google Driver (My PC is a Windows 7 Pro x64 machine btw).
Anyhow, I have pulled this stunt twice now - once editing the .inf file for the Google Driver, and I did it once with the Universal Naked driver too. You can choose which driver you want to start with.
If you want to give it a roll, you can start with any of those three drivers:
- Google (SDK) USB driver
- XDA "Universal Naked" driver
- Asus Nexus 7 USB Driver (Look under Download)
Note that since you are using W7 x64, make sure that you add each new entries to the .inf file twice - once in the ".NTx86" section, and duplicated again in the ".NTamd64" section. When editing .INF files, make sure to use an editor which preserves simple text file formatting - use "notepad", not "wordpad"
If you want a reference for what values to use, see the bottom end of this post. You should see exactly these same values in your Device Manager, however.
Note that if you see the device show up in the Device Manager as being correctly identified and marked as "working normally" - but it doesn't work - you should probably remove that driver and re-install from a different driver package.
This would certainly be the case for any drivers you saw associating with VID/PID pairs that look like:
VID_18D1&PID_4E40 bootloader/fastboot
VID_18D1&PID_4E41 single adb
VID_18D1&PID_4E42*&MI_01 composite adb
VID_0955&PID_7330 avx mode
VID_18D1&PID_D001 adb in TWRP (maybe CWM too, I didn't check)
That's a lot to throw at you, especially with Italian <=> English in the mix.
Feel free to ask questions.
bftb0

Hello,
I tried to follow your advice but I have not solved.
I'll explain what I did, so you can correct me.
-Uninstalled previous drivers (from device manager, control panel)
-Restart the PC
-Modified the inf file. Package Asus Nexus 7 USB driver (ntx86 and NTamd64 sections) attach screenshots
-Linked N7 (usb debugging actived)
-Found portable device in device manager, update drivers manually from the Nexus 7 Asus USB drivers
I tried to change also too XDA "Universal Naked" driver by following the same procedure.
I tried to create another account on my pc, but no ADB!
View attachment 1734997

Did you update to 4.2.2?
The is something to do with adb in that update, needing a password or something. I am not sure but if you did update you might want to check that.
Sent from my Nexus 10 using Tapatalk HD

stonebear said:
Did you update to 4.2.2?
The is something to do with adb in that update, needing a password or something. I am not sure but if you did update you might want to check that.
Sent from my Nexus 10 using Tapatalk HD
Click to expand...
Click to collapse
Use "Google USB drivers" you get after you install from here http://developer.android.com/sdk/index.html
Its drivers work with 4.2.2
I got 4.2.2. rooted with ADB working now via only this and no other method

No problem with adb in 4.2.2... I tested yesterday (no need psw too...)
stonebear said:
Did you update to 4.2.2?
The is something to do with adb in that update, needing a password or something. I am not sure but if you did update you might want to check that.
Sent from my Nexus 10 using Tapatalk HD
Click to expand...
Click to collapse

Marco16V said:
-Found portable device in device manager, update drivers manually from the Nexus 7 Asus USB drivers
Click to expand...
Click to collapse
Is this the only device which shows up in the device manager? The "Portable Device" is either the MTP or PTP endpoint - not ADB. The latter (adb) should show up elsewhere in the device manager.
You should certainly NOT be trying to install fastboot/adb driver on MTP/PTP endpoints!
I think perhaps I am not understanding because I am guessing at certain details.
Q1) Do the drivers appear to install correctly?
Q2) When you have the N7 in the corresponding mode - whether or not you observe (device manager) "working normally" or "unknown device" - do you see the following Hardware IDs showing up in the device manager?
Bootloader Fastboot Mode:
USB\VID_18D1&PID_4E40&REV_0000
USB\VID_18D1&PID_4E40
OS adb:
USB\VID_18D1&PID_4E42&REV_9999&MI_01
USB\VID_18D1&PID_4E42&MI_01
TWRP adb (Possibly also CWM adb, I haven't checked it) :
USB\VID_18D1&PID_D001&REV_9999
USB\VID_18D1&PID_D001
Q3) I presume you went through the same install sequence on your PC that succeeded on the other laptop - in the event the problem is a hardware problem, did you try a different cable or USB port on your PC?
Q4) When you remove drivers, are you requesting that the drivers be removed from the PC?
The 4.2.2 authentication issue might be an issue (although I suspect this is a adb program version issue, not a driver version issue. In any event, it wouldn't effect the behavior of adb in TWRP/CWM.
Sorry for all the questions.

bftb0 said:
Is this the only device which shows up in the device manager? The "Portable Device" is either the MTP or PTP endpoint - not ADB. The latter (adb) should show up elsewhere in the device manager.
You should certainly NOT be trying to install fastboot/adb driver on MTP/PTP endpoints!
I think perhaps I am not understanding because I am guessing at certain details.
Q1) Do the drivers appear to install correctly?
Q2) When you have the N7 in the corresponding mode - whether or not you observe (device manager) "working normally" or "unknown device" - do you see the following Hardware IDs showing up in the device manager?
Bootloader Fastboot Mode:
USB\VID_18D1&PID_4E40&REV_0000
USB\VID_18D1&PID_4E40
OS adb:
USB\VID_18D1&PID_4E42&REV_9999&MI_01
USB\VID_18D1&PID_4E42&MI_01
TWRP adb (Possibly also CWM adb, I haven't checked it) :
USB\VID_18D1&PID_D001&REV_9999
USB\VID_18D1&PID_D001
Q3) I presume you went through the same install sequence on your PC that succeeded on the other laptop - in the event the problem is a hardware problem, did you try a different cable or USB port on your PC?
Q4) When you remove drivers, are you requesting that the drivers be removed from the PC?
The 4.2.2 authentication issue might be an issue (although I suspect this is a adb program version issue, not a driver version issue. In any event, it wouldn't effect the behavior of adb in TWRP/CWM.
Sorry for all the questions.
Click to expand...
Click to collapse
When the drivers are not installed and I connect to pc N7, is only recognized as a portable device, then later recognized as Google Nexus 7.
To install the drivers (modified as described) I click reinstall driver, then later recognized (if connected to pc in android mode, with usb debugging actived) as Android Device in another voice, ADB interface. But is not recognized by the toolkit under adb devices, and even when I try using cmd.
1-When I install the drivers. seem to be installed correctly.
2-Sorry, where can I find Hardware IDs in Device Manager? What is the difference between OS adb and TRWP adb?
3 - In other pc (with same N7, same cable, same driver, same toolkit) I had no problems. I tried to change only the USB port.
4-I uninstall the driver from device manager (uninstall voice) and ask to be also uninstalled software from the PC
In some Italian forum, I found people with the same problems.
Solved by formatting PC. I would not do that ...
Thanks for your help, sorry for my English and my limited skills

AW: No ADB mode, driver issue?
Try to download the latest Android SDK and try to connect with that adb version. Adb with version < 1.0.31 will not work correctly with Android 4.2.2.
Sent from my Nexus 7 using xda app-developers app

AndDiSa said:
Try to download the latest Android SDK and try to connect with that adb version. Adb with version < 1.0.31 will not work correctly with Android 4.2.2.
Sent from my Nexus 7 using xda app-developers app
Click to expand...
Click to collapse
I tried sdk but I have not solved.
I use Android 4.2.1. I'm having problems with the update! I can not update OTA (N7 stuck under the impending reboot). I also tried to download the zip file to upgrade the memory and flash it from recovery but the installation is not completed (error 7 build.prop).
I also tried to flash the factory image 4.2.1 (keeping userdata) and start again. Nothing, same mistakes!
Too many problems!

Marco16V said:
2-Sorry, where can I find Hardware IDs in Device Manager?
Click to expand...
Click to collapse
(Note I attached some pictures below)
From the Device Manager:
- Select the Device in question by right-clicking. Choose "Properties"
- A window with three tabs will appear: General, Driver, and Details. Select Details
- The "Property" combo-box-selector has 20 or 30 items - the 2nd one in the list is Hardware Ids. I attached two pictures from Win7-Pro-x64 (below)
But note as I said before: You should NOT be seeing the ADB endpoint under "Portable Devices" - if ADB Debugging is turned on in the OS, you should see it under "Android Phone" or something similar. In any event, the hardware Ids will identify it exactly
Marco16V said:
What is the difference between OS adb and TRWP adb?
Click to expand...
Click to collapse
Well, as far as the behavior of the USB driver on the PC, almost nothing. Unfortunately - for better or for worse - both TeamWin (TWRP) and CWM authors put their ADB interface on the bus with the VID/PID pair of USB\VID_18D1&PID_D001, whereas the OS puts all its USB interfaces on 18D1/4Exx.
So, even if you get a driver installed for the OS "adb" mode (say by using the Google SDK USB driver or the Asus Nexus 7 driver), it won't work for the custom recovery... unless you fix up the driver installer package to have the matching VID/PID pairs (18D1/D001) in the .INF file for that driver.
I think folks find this confusing - they think, "wait, I have a ADB driver installed" - why does it not work?
OK, there are a couple more things to try (at least before I give up). Roughly they try to answer these questions:
Q1) Is this a toolkit issue, or a driver issue?
Q2) Is it a prior driver you installed that you are not observing that is causing the problem?
The first one (Q1) is easiest to diagnose: when your PC Device Manager indicates that a device is "working normally" - AND THE VID/PID ID MATCHES WHAT YOU SHOULD EXPECT FOR THE MODE THE TABLET IS IN (regular OS, recovery boot, fastboot mode), can you communicate with the device from the Windows command line? e.g.,
Code:
C:\foo> cd C:\blahblah\sdk-platform-tools-directory
C:\blahblah\sdk-platform-tools-directory> fastboot devices
or
C:\blahblah\sdk-platform-tools-directory> adb devices
If you can communicate with the tablet from the command line - your device ID will be printed by the above commands, then you don't have a driver problem at all - there is something screwy about the way your toolkit is installed.
OK, Q2 -
When Windows installs a driver, it caches it into a kind of database. I suppose it is possible that a prior driver installation might be causing trouble. You can observe - from the device manager - all the drivers that are installed - even for devices that are not currently connected to your computer.
This is done by setting the "devmgr_show_nonpresent_devices=1" environment variable. It can be done semi-permanently this way, or for a single invocation of the device manager this way..
See the third image attached (devmgr-all-devices.jpg ) - it is my computer in that "show all devices" mode. See all that rubbish in there? It's from other Android devices (HTC, Samsung, etc).
You can walk through each one of those - even the devices that are not currently attached - and inspect the VID/PID pair to see if they happen to match the values that you are expecting to see for the different operating modes on the Nexus 7. I'll leave it up to you whether you want to do this or not; it is a bit tedious. Just don't start deleting drivers willy-nilly if you don't know what they are associated with.
Marco16V said:
Thanks for your help, sorry for my English and my limited skills
Click to expand...
Click to collapse
I am understanding everything you are saying - and your english is far better than my italian
good luck!