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[Q] device not recognized over USB

I've been trying to connect my Trasformer to my computer over USB for a while now so that I can use Nachoroot. When I plug it in, a bubble pops up on my PC on the bottom right saying "USB device not recognized". If i go into the device manager and click update driver and have it look in the folder with the USB drivers from Asus's website, it says that i already have the most up to date drivers. I've tried uninstalling the device, installing the package with Sync and web storage, but get the same result.
I have tried using a different cable, a different computer, and a different operating system (specifically windows 7, windows 8, and ubuntu). I've also restored my Transformer using the option in Settings.
Anybody have any ideas as to what will work?

Have you install Asus PC sync?
If you haven't you should

yes, i've installed sync.

Take a look at this thread, especially the "trouble shooting" portion
http://forum.xda-developers.com/showthread.php?p=13635629

I had looked at that thread before and have tried all of those steps, and tried them again, but no luck.
One note being that with the other drivers from the hotfile download on that thread, i'm unable to install them. In the device manager on my computer, when I plug the computer in it shows up as an unrecognized device, and when I try to use those drivers it says that they don't apply.

I am having the same problem. I was rooted on the 3.2.1 system with a US version BAO transformer TF101-A1 and the computer was able to use the drivers. However, I could not upgrade and was having issues unrooting, so I did a factory reset then upgraded OTA 3 different times until I got to the ICS 4.0.3 (which runs fine, just unrooted!). Now I cannot get the transformer drivers to install! I get the "USB Device Not Recognized" error and in the device manager it shows up as an Unknown Device under Universal Serial Bus Controllers. I try to update the drivers using Asus drivers, Vipormod drivers, and the drivers I used to originally root it which was Brks_rootkit_v7, but it won't accept them. This is without Asus Sync installed and trying on four different computers using Windows 7 64 bit and two different cables. I even tried loading the Asus Sync and it will not find the device. When I try to boot into stock recovery, I just get an Android that falls over with a red exclamation point. Also to note, my wife has a transformer still on 3.2.1 and rooted and it recognizes it immediately on all four computers using either cable. I have been everywhere searching for an answer (including this site) and tried just about everything. I just submitted a service claim email to Asus telling them that after the update I am unable to use Asus Sync and the drivers aren't recognized. I am extremely frustrated! Any help will be appreciated.

http://forum.xda-developers.com/showthread.php?t=1468832
and
http://forum.xda-developers.com/showthread.php?t=1476886
These also seem to be a similiar problem and as yet a solution has not been found.

Thank you for your quick reply. I will head over there.

Just to clarify, I can download the appropriate file, flash that file (using cwm) and then it will boot up in ICS or do I need to update to ICS after that?
Thanks,

NV Flash help

I'm getting really frustrated been at this thing for a few hours, I cannot install the naked drivers because Windows 7 says I have the most recent driver. Not having the naked driver has me stopped on the using wheelie to access NV Flash part because I cant get it into APX mode. Ive tried stopping windows from automatically installing drivers but it still installs it whenever I plug in the tablet. Has anyone had this issue that could help?

JLine05 said:
I'm getting really frustrated been at this thing for a few hours, I cannot install the naked drivers because Windows 7 says I have the most recent driver. Not having the naked driver has me stopped on the using wheelie to access NV Flash part. Ive tried stopping windows from automatically installing drivers but it still installs it whenever I plug in the tablet. Has anyone had this issue that could help?
Click to expand...
Click to collapse
you're already in the step of booting in APX mode right?
1. Turn off your device and insert USB cable to your device only
2. Hold volume up then plug it to your computer and since you said you stop auto install driver it will now recognize that windows is unable to find driver for APX device and that's where you use the naked driver. after that you can execute the wheelie command and tada you're done!:good:

melvsmeister said:
you're already in the step of booting in APX mode right?
1. Turn off your device and insert USB cable to your device only
2. Hold volume up then plug it to your computer and since you said you stop auto install driver it will now recognize that windows is unable to find driver for APX device and that's where you use the naked driver. after that you can execute the wheelie command and tada you're done!:good:
Click to expand...
Click to collapse
Yes! Got it! Time for some JB goodness! :highfive: Thanks man!

Usb drivers for your android phone

USB Drivers are let your PC communicate with your device.
If you are executing some ADB Commands, you will need USB Drivers installed which will let the ADB server on your PC communicate with the ADB client on your device. If there are no USB Drivers installed on your PC, you will not be able to perform activities on your device via the PC.
First of All I would recommend you to install Universal ADB Driver Installer.The Universal ADB Driver installer detects your phone and installs the ADB drivers for it.This tool developed by drsmart is your solution to the “device not found” error you might get on executing ADB commands.
Universal ADB Driver Installer Download Link - http://adbdriver.com/downloads/
USB DRIVERS
1.SAMSUNG:
--- http://www.samsung.com/us/support/downloads
2.LG
---http://www.lg.com/us/support/mobile-support
3.HTC
---https://support.htc.com/en
4.SONY
---http://developer.sonymobile.com/downloads/drivers/
5.ASUS
---http://support.asus.com/download/options.aspx?SLanguage=en&type=1
6.MOTOROLA
---http://www.motorola.com/sites/motodev/us-en/motodev_lp.html
MORE DEVICES WILL BE UPDATED

Thanks for the info. I tried the univ adb driver installer but it showed I already had the right driver installed. Windows explorer can see my phone but other apps like HTC Sync or myphoneexplorer can't. This only happened after I rooted & installed a new rom. Maybe the rom is faulty...

I want Google nexus driver
any one can help me ?

mt6572 driver
Please add driver for mt6572 device

thx. very usefull!

thanks for the updated links.

Gole Maryam said:
I want Google nexus driver
any one can help me ?
Click to expand...
Click to collapse
an universal driver for all Nexus Devices (Phones and Tablets) can be found here:
http://forum.xda-developers.com/showthread.php?t=2513339

No access to USB debug
I give up and need some professional help...Ya both kinds.
Here we go, I have the Galaxy 3 d2att I747
Rooted
I was running CM 10.2 with latest nightly, I think 20131208 and decided to update to CM11 via my Cyanogenmod updater but before I did I had read somewhere I should change from CWM recovery to TWRP so I downloaded Goomanager and updated to the TWRP version for my phone then went for the KitKat update and thats when the trouble began.
I am now stuck in a boot loop even if I try to boot into TWRP all I get is the TWRP boot logo then straight into boot loop again. I am almost positive I did a factory wipe as well as cache/dalvik.
Not being able to use TWRP to get into recovery I thought I would just use Odin but I can't get any of my laptops to recognize the phones USB, I just get the windows usb driver error and have tried to install the drivers manually via device manager using my samsung 7 chronos with windows 8.1 and my acer with windows 7. I updated drivers using Samsung Kies and from the website, no luck.
I also ventured into an area that I have no expertise in but I guess thats how we learn so I downloaded the Android SDK thinking I could use it to download and install the google USB drivers that way, but I can't get out of boot loop to make sure USB debugging is checked. The only thing I can access is the stock download mode which would be great if I could use the USB connection.
What am I missing? Any suggestions?

USB Not Recognized Error
I noticed that my phone suddenly stopped being recognized on both my Windows 7 and Win8 laptops. I have been trying to fix it with the drivers but to no avail. However, I plugged my phone in with a different USB cord and voila it was recognized and working. Maybe this could possibly be a simple fix.

My computer stopped recognizing my Skyrocket
Hi Everyone,
I also am having trouble with my win 7 computer recognizing my Skyrocket suddenly. I have been using several KitKat roms and they have been working just fine, except for some reported bugs that the CM devs are working on. I even was able to connect to the computer and explore both my internal and external drives. Then suddenly that stopped and the computer gave me a need to get drivers warning. I've tried to download drivers from Samsung and the computer says they are already installed. I also tried the universal driver download and got the same message. Any help would be appreciated. Like the others on this forum, I wouldn't be able to odin if I got in trouble.
Thanks for your concideration,
drewfs7270

I switched to a different rom and now it's working again !
Sent from my SAMSUNG-SGH-I727 using Tapatalk

Thanks.. :good: usefull

Also, any mobile manufacturer website has guides or direct downloads for drivers. Otherwise uni drivers suffice.....
Sent from my Nexus 5 using xda app-developers app

mtk preloader driver unable to install/unplugged appears
mt65xx unplugged when I try installing my device, I tried uninstalling all preloader vcom drivers in my laptop then restart and when I try to connect my device mtk mt65xx preloader just pops up in device manager then suddenly disappears and unknown device shows instead. I also tried manually update driver for unknown device then select the folder where my mtk driver is saved still unsuccessful? I've also searched and tried many other ways out there still no luck. Can anybody give me a solution? By the way i'm using windows 7 x64.

Delted
Edit: Deleted

soft brick
I face bad experienced, the tablet can not boot ( after install TWRP ) but enable to enter the fastboot mode and can be detected by the computer as android adb interface but adb can't communicated with the tablet. (list of devices atached)
I do have a backup file ( I make it before soft brick, I make backup using dd command, because I don't have cwm/twrp recovery ).... but how to flash it ? Tablet chipset is wonder media 8980 OS android 4.2.2
I can not flash it by adb/fastboot.
Maybe someone here can give me a little guide for how to....
I really appreciate for your kindness

Hey, I made an expirience, which might help other users as well.
I have a Sony device (Z1C) and use Windows 10, maybe this will help for other brands and for other Windows 10 users.
I installed drivers for my device and was able to use adb. When I put the phone into fastboot mode, it was not recognized anymore. I found out, Sony has a seperate (updated, maybe?) driver for fastboot mode. When I tried to install this, the driver was not signed and Windows refused to install it. However, you can enter the UEFI (successor of BIOS) and enable installation of unsigned drivers (at own risk). Then I was able to install the fastboot driver and controll my phone in fastboot mode as well as in adb mode.
In conclusion: You might think you installed drivers, because you did, but maybe you did not.

Even on LineageOS page, many people fail to mention that, you DON'T and SHOULDN'T install any generic or universal ADB driver if you have Samsung device. As you can just install Samsung USB Drivers officially from Samsung site. Samsung USB Drivers already contain ABD interface driver just fine so Universal ADB driver is redundant for Samsung phones.

Root without PC/USB

Hi,
Have a TF101 tablet here stock rom, stock recovery...
However it seems the USB will not detect on a windows PC tried multiple cables multiple PC's tried from recovery nothing is detected in device manager at all. Tablet doesn't even detect that its connected to PC either.
Is there anyway to root this thing without USB??? I need to root it so I can install recovery and flash another rom.
Thanks,

Which Windows version are you running?
If you use Win 7 and prior you should be able to connect with the universal naked drivers manually installed from device manager
Win 8 and above need driver signing disabled or they wont install the driver and the PC wont see the TF
If you have already tried the above, you might need a new cable
http://forum.xda-developers.com/showthread.php?t=1688012

*Detection* said:
Which Windows version are you running?
If you use Win 7 and prior you should be able to connect with the universal naked drivers manually installed from device manager
Win 8 and above need driver signing disabled or they wont install the driver and the PC wont see the TF
If you have already tried the above, you might need a new cable
http://forum.xda-developers.com/showthread.php?t=1688012
Click to expand...
Click to collapse
Thanks. Well i tried windows 7 x64 and windows 8 x64, neither showed any device or unknown device in device manager... Tried multiple cables as wel, no dice...
Shouldn't MTP work regardless of drivers installed in windows 7/8 ?

Are you putting the TF into APX mode?
Connect TF to PC USB > Power Off TF > Hold Power & Volume Up until the PC recognises it (Only takes a couple seconds, nothing appears on the TF screen) then install drivers
You need APX mode for Easyflasher
For normal media transfer, it will still need to install at least some USB type driver, as do all USB devices to function, possibly not the APX drivers
Check in Developer Options > USB Debugging mode
Try it enabled and disabled with the TF plugged in
But really the MTP drivers are not what you need if you want to root. you need APX mode to work (As above)

*Detection* said:
Are you putting the TF into APX mode?
Connect TF to PC USB > Power Off TF > Hold Power & Volume Up until the PC recognises it (Only takes a couple seconds, nothing appears on the TF screen) then install drivers
You need APX mode for Easyflasher
For normal media transfer, it will still need to install at least some USB type driver, as do all USB devices to function, possibly not the APX drivers
Check in Developer Options > USB Debugging mode
Try it enabled and disabled with the TF plugged in
But really the MTP drivers are not what you need if you want to root. you need APX mode to work (As above)
Click to expand...
Click to collapse
Doesn't seem to do anything when I hold power vol+, the screen of the tablet (blank/off) and on the pc nothing is being detected.
I can get to the bootloader/recovery via holding power vol- though. Also tried USB debugging mode... nothing is detected whatsoever... ordering another cable on ebay will see if that works but I doubt it since it seems to be a common issue with this tablet (port not working with pc)

I edited my post
Nothing will appear on the TF screen in APX mode until data transfer begins
The cheap non genuine cables are renowned for data connection failing, genuine cables are recommended
I still have my original cable and it still works 100%

*Detection* said:
I edited my post
Nothing will appear on the TF screen in APX mode until data transfer begins
The cheap non genuine cables are renowned for data connection failing, genuine cables are recommended
I still have my original cable and it still works 100%
Click to expand...
Click to collapse
Using the original cable, I still can't tell if its in APX mode, installed all the drivers provided by asus, nothing is detected in windows device manager. I'm 100% its not being detected ie. no connection. I ran easyflasher anyway both sbk1 and sbk2 says it flashed recovery but it never did still the stock recovery is on the tablet.
Will try again once the new cable comes in, thanks.

Forget the ASUS drivers, use the Universal ones from the Easyflasher thread
Here's what will happen when its working as intended
When you plug the TF into the PC, no matter what mode it is in, the PC should sound the USB connect sound
When you power off the TF, then put it in APX mode, the PC will again sound the USB connect noise, then it will fail to install the correct drivers
That's when you open Device Manager, find the ! missing driver ! exclamation mark, and update drivers manually pointing it to the extracted Universal drivers
Once you have installed them, then Easyflasher should work as normal
So unless you actually have a hardware fault on the TF, or the USB ports of the PC, Id hedge my bets on the cable
Have you tried a different PC?

*Detection* said:
Forget the ASUS drivers, use the Universal ones from the Easyflasher thread
Here's what will happen when its working as intended
When you plug the TF into the PC, no matter what mode it is in, the PC should sound the USB connect sound
When you power off the TF, then put it in APX mode, the PC will again sound the USB connect noise, then it will fail to install the correct drivers
That's when you open Device Manager, find the ! missing driver ! exclamation mark, and update drivers manually pointing it to the extracted Universal drivers
Once you have installed them, then Easyflasher should work as normal
So unless you actually have a hardware fault on the TF, or the USB ports of the PC, Id hedge my bets on the cable
Have you tried a different PC?
Click to expand...
Click to collapse
Ok, well ya thats the thing no sound or detection of anything when plugging it in, or going into apx mode, rebooting etc...
I tried 2 cables and 2 different PCs. Will try a new cable but I betting that is won't work either... we'll see.
Thanks again

No need to bother with cables and drivers, just download Baidu Root: https://app.box.com/s/pyehf9fh4xem3hy50dot
EDIT: The app has built-in su access management, but I'd recommend installing SuperSU from the Play Store.

Duchman said:
No need to bother with cables and drivers, just download Baidu Root: https://app.box.com/s/pyehf9fh4xem3hy50dot
EDIT: The app has built-in su access management, but I'd recommend installing SuperSU from the Play Store.
Click to expand...
Click to collapse
THANK YOU!!!!!!!!!!!!!!!!!!!!!!!!!! Worked to let me get TWRP installed and flashed a new rom with SU etc...
Thanks again!!!!!!!!!

Is my Device bricked?

All I see is a google logo, not rebooting just staying on the screen. I am pretty sure I deleted the operating system, but I can't seem to get in recovery. What lead up to this was me not being able to connect the device to windows over usb, nothing in device manager, I couldn't even get adb to connect even through twrp sideload. But now I think I caused a whole new issue. I'm just trying to get back to stock rooted lol. Advise?
Edit: unpluged battery and replugged it in, got into recovery now, still having issues connecting so I can flash a rom.
Edit: I have the google usb driver installed from the android sdk. I still can't see my device in windows device manager nor I can't see it through adb. still searching around for a solution.
Edit: I found my old rom still on the device so I was able to install that to actually use the device. I still can't seem to connect to the pc in any way though. I have usb debugging checked drivers installed. Windows just doesn't seem to think a device is there.

s101999 said:
All I see is a google logo, not rebooting just staying on the screen. I am pretty sure I deleted the operating system, but I can't seem to get in recovery. What lead up to this was me not being able to connect the device to windows over usb, nothing in device manager, I couldn't even get adb to connect even through twrp sideload. But now I think I caused a whole new issue. I'm just trying to get back to stock rooted lol. Advise?
Edit: unpluged battery and replugged it in, got into recovery now, still having issues connecting so I can flash a rom.
Edit: I have the google usb driver installed from the android sdk. I still can't see my device in windows device manager nor I can't see it through adb. still searching around for a solution.
Edit: I found my old rom still on the device so I was able to install that to actually use the device. I still can't seem to connect to the pc in any way though. I have usb debugging checked drivers installed. Windows just doesn't seem to think a device is there.
Click to expand...
Click to collapse
Try toggling MTP and/or PHP in USB options.
Your device might show up as an adb device in Device Manager.
Edit:
Some more info here:
http://forum.xda-developers.com/showpost.php?p=57205550&postcount=146

Use a different usb port, different cords, or even a different computer, until you get a pc to recognize the phone.

I had this. It was because not all USB leads have data. Even some that do are wired different. Use the original or HTC work fine with N5 as I've both brands

howard bamber said:
I had this. It was because not all USB leads have data. Even some that do are wired different. Use the original or HTC work fine with N5 as I've both brands
Click to expand...
Click to collapse
Well on my 4th cable, what do you know it works just fine. Feel a little silly but thanks everyone.