unknown device - Nexus 7 (2013) Q&A

i have the flo version, installed cm11 with glitch, but soon as i plug it into the pc i get unknown device. weird thing is it worked just fine with stock rom. i did restore to the stock rom to confirm and it did work just fine on stock.
so the problem is with cm11. all my drivers are fine as pointed out by everything being fine with stock roms.i did check to see if developer options are disabled, and if fast charge was disabled. i tried connecting to 2 other computer 1 of which is a win xp machine all them say unrecognized and i tried other usb cables. so again this is an issue which cm11 that i have no idea how to fix.
ignore this, i have fixed this on my own, i booted into recovery after installing cm11 and re formated the data/cache/dalvik booted and now it works. not sure why it would. but hey i am not gonna argue with what worked

Related

Usb not working.. Help!!

Hi. So i flashed a nandroid of mine from back in Jan since for some reason when i upgraded CM my market and gmail went missing.
Everything works fine except that now whenever i try to connect to usb it says "usb device not recongized"
Any help? I know it was working when i made the nandroid!
Phillyrider807 said:
Hi. So i flashed a nandroid of mine from back in Jan since for some reason when i upgraded CM my market and gmail went missing.
Everything works fine except that now whenever i try to connect to usb it says "usb device not recongized"
Any help? I know it was working when i made the nandroid!
Click to expand...
Click to collapse
When you upgraded CM, did you flash the google apps add-on? If not that is why your market & gmail were missing.
Which CM are you using? I can't get usb to mount with CM7 # 12, but I worked fine with #5.

[Q] insertcoin USB problem

Device: Desire GSM
I installed insertcoin 1.1.3 on monday and it seemed to have sorted the problems I had with crashing sense.
However I did have a problem with usb detection on win7 64 at one point. I had a demand for a scan pop up- this is something that occured frequently when my camera was still crashing. I cancelled the scan and Win7 sprung me a device error. That had not happened before.
I just unplugged/replugged and the issue was solved.
The next day I saw the 1.1.3 and 1.1.4 updates solved usb tethering issues. I figured why not try and updated, then flashed the kernel (without booting).
Result: windows won't recognize the device anymore, doesn't accept android usb drivers for it (the device returned an error). It is shown as unknown device in device manager. Furthermore, after trying to connect the card can no longer be mounted by the phone.
A restart sorts it, but it's still not very satisfactory. Does anyone have the same problem?
Did I flash the wrong kernel? It said bravo...
Meanwhile I'm going to go back to 1.1.2 and stay there...
Sounds like usb brick. A guide how to fix can be found here on xda.
TouchPaled from Oxygen with Transparent XDA App
Not a phone issue
Well I went back to 1.1.2, flashed a different kernel, flashed leedroid, then back to 1.1.2.. all of which gave no joy. Same issue exactly.
However finished my sick leave and it connects fine on my work pc.
So it's probably the cable and I'll check that tonight (was a bit too ill to crawl around the back of my home desk) and report.
(for those who found this by searching I guess RMD recovery is the USB Brick fix.)
No that's not the usb brick fix, it's a recovery. By using the search one can find a guide extra for usb brick.
TouchPaled from Oxygen with Transparent XDA App
So it turns out to be a faulty cable, and that is that.

[Q] usb not working

Hey guys
i recently flashed codename android 1.3.3 and i could no longer mtp host so i switched roms and still not dice i flashed every kernel and nothing is working does anyone know how to fix this or and i screwed. to be clear my phone still charges it just wont mount to transfer files. adb does not recognize that a phone is plugged in either
thanks in advance for all the help
Matt
Mine is doing this now as well following AOKP Build 23. I haven't bothered flashing anything else yet as I was doing preliminary research before work to try to find out exactly what happened and how I could fix it. (No answer yet).
Edit: I found a solution. It won't automatically turn on anymore, but I can turn it on manually under Settings > Storage. Problem fixed (for me anyway).
no idia??how can improve this
i tried that still not working is there any way to uninstall the drivers from the phone?
Had this problem after installing AOKP 23 too. Have to turn on manually.
Working now.
Could be that you have a faulty USB port. Many have reported about this here http://forum.xda-developers.com/search.php?searchid=15930021

Weird connection-to-pc behaviour

My GSM unlocked GN, running original ROM IMM76D with Franco kernel Milestone 3, stopped responding to being plugged into a USB port using the original cable (I don't have another cable atm). I just wanted to change some music I had on it and I realized it just doesn't detect the phone.
Since I tried an OTA update to IMM76I that didn't work, I thought it might have fiddled with something, so I decided to upgrade to IMM76I using the trusted toolkit which I've already used several times.
[on win7 sp1 64bit]
I managed to browse the phone when it was in recovery mode (ADB), and take off it my various backups - not via the toolkit. Flashed, unlocked, rooted, the works. Restored apps. Plugged back into the computer... Nothing. The computer reads it when in fastboot or recovery though. If the device is plugged in before fully booting into Android, it works fine. If I unplug it and try again - when android is fully up and running - no cigar. It doesn't even read on the toolkit. Receives power though.
I've tried connecting the phone to other computers (other win7 no sp1, xp), still nothing. That's why I assume it's a phone software problem, but I can't figure out what. Did anyone encounter this phenomenon?
Do you have fast-charge enabled?
Also make sure MTP is checked in Settings>storage>options.
MTP is on and always was.
I have supercharging on via the franco app. I'll try turning it off and plugging it in when I get home.
Sent from my Galaxy Nexus using XDA
That is why. If you disable USB fast charge it'll work great again.
Only use fast/supercharge, if you're in a hurry to charge your phone, like in a train, or something...
When you're at home, just leave everything as it is, and you'll never have problems, like that...
If that then doesn't work, reinstall the drivers
thanks people! I'll send franco an email about mentioning that supercharging disables data right next to the enabling tickbox.
Not home yet...
Sent from my Galaxy Nexus using XDA

PLEASE HELP. ROMs not installling properly.

I fall into weird problem. Once I unlocked bootloader and installed custom rom. But when I revert back to stock I lost my 3G. I tried flashing ROMs to get it solved but I failed. It was 5-6 month ago.
Recently, I again flashed custom ROM because stock was too slow. After flashing CM9-KangBang ROM, which, I thought would be good as it was mentioned stable. I found SD card not mounted but 3G worked magically which didn't happened for other custom ROMS. Weird problem is I couldn't install any ROM after that. Because after connecting via usb my computer says, "USB DEVICE NOT RECOGNIZED". So I couldn't install kernel which is required after flashing ROM. Another problem is when I install Ignorance ROM, which doesn't require installing kernel separately, also not working after boot. Stuck on boot animation.
I don't know what to do. Can't find my way. My mobile is off for 3 days. Now its urgent for me to make it run.
Please help me. I never felt so helpless like this because somehow I solved my problem.
N.B - I tried flashing ROM on other computer but same result. USB DEVICE NOT RECOGNIZED. Funny thing is CM9-KangBang works fine without SD card.

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