[SOLVED] SD card randomly dismounts from PC. - Nexus One General

So, if I leave my N1 connected to my PC (Win XP Pro SP3), either just idling or transferring large files (> about 50mb) it'll just dismount. Randomly.
I can't duplicate the problem exactly, but it does it all the time.
I had the same problem with my old Magic, and I've had it on various PCs.
Anyone had similar problems, or is it just me?

By my understanding, this happens if the Nexus gets insufficient power from USB to charge the battery and support the USB connection. This is usually not Nexus'es fault, but computer's fault (some computers don't have up-to-spec power in USB ports).
I always got these problems when I connected my Nexus through an unpowered USB hub. As soon as I connected the hub's power block, the issue disappeared.

pikipirs said:
By my understanding, this happens if the Nexus gets insufficient power from USB to charge the battery and support the USB connection. This is usually not Nexus'es fault, but computer's fault (some computers don't have up-to-spec power in USB ports).
I always got these problems when I connected my Nexus through an unpowered USB hub. As soon as I connected the hub's power block, the issue disappeared.
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That makes sense. It charges REALLY slowly on my work PC.
Thanks!

Related

Computer reboots/BSOD when connected to USB

Hello there,
Running an O2 XDA Mini S stock ROM with ActiveSync 4.1 on a Windows 2000. Initial ActiveSync went without a hitch, with the mobile able to sync with exhange server nice and smoothly. Then later on, whenever the phone is plugged into or unplugged from the USB data cable, the computer just reboots.
Are there any known issues with this? Could it be a problem with the USB drivers on the computer or the ports themselves? The phone developed this problem whilst plugged into an externally powered hub, but plugging the phone directly into the motherboard USB ports produced the same problems.
Thanks in advance,
Andy.
EDIT: I've attached a CPUZ report of the system so you can easily see the spec of the computer.
It's possible that your phone conector are damaged and makes a cortocircuit when you connect to the cradle.
Try whitout pluging the power in the cradle, only connecting to the usb port of the computer.
darkbyte said:
It's possible that your phone conector are damaged and makes a cortocircuit when you connect to the cradle.
Try whitout pluging the power in the cradle, only connecting to the usb port of the computer.
Click to expand...
Click to collapse
That could be a possibility, but not using a cradle here, just USB Cable.
Try deleting all of the USB controllers in Device Manager then rescan to pick them up again. resolves a multitude of USB problems
wilesd said:
Try deleting all of the USB controllers in Device Manager then rescan to pick them up again. resolves a multitude of USB problems
Click to expand...
Click to collapse
Just tried that after reading your post, no dice Thanks for the help so far though
if u r using a firewall , either disable it or delete it all to gether
i had the same problem with sygate personal firewall
If you have Kaspersky AV, download the newest version on the kaspersky website! It's not a very good idea to uninstall or disable the firewall.
Thanks for all the help guys, definately gave us a few extra things to try
Just to update the thread in case anyone comes across a similar problem in the near future;
After exhausting every possible Driver reinstall/upgrade/reformat we have come to the conclusion that it's faulty hardware (USB related) on the motherboard, so will be transferring the PC out. The PC in question is a good 5 years old and it's the MD's, so he was due for an upgrade in the near future anyway

USB device has Malfunctioned (TyTN, Thinkpad, Win Vista RC1)

Greetings,
I'm having a problem when connecting my TyTN to my Thinkpad T43. When I connect the TyTN to a USB port (regardless of which one) on the laptop, it connects initially and starts charging, but after a while it disconnects, the charge light goes out and Windows puts up a message saying that the USB port has malfunctioned.
Unplugging and switching to a different USB port does not help, and I've tried a different USB cord without any change.
It seems a bit intermittent because right now as I'm writing this, it has stayed connected for quite a while.
I'm wondering if anyone else has experienced this problem - I'd like to try to figure out if it is a hardware problem with the TyTN, something specific to Vista, or a problem with the Thinkpad itself.
Maybe the TyTN is drawing too much power from the USB port while charging?
/POL

PC Reboot upon USB Connection of Hermes

Hello,
Its been few months now that I have this issue, and wasn't able to solve it yet
Every time I connect my TyTN/ Hermes on the USB port of my laptop it causes a n immediate reboot. Even when the Laptop starts again when the usb ports are reactivated (the Hermes is still plugged-in) it reboots again and again ...
This is very inconvenient (...) I would say because I can neither Sync (Activesync 4.5) nor recharge my TyTN through the USB port. Even if I disable communications on activesync it does the same ...
Any ideas? anyone had similar issues?
Thanks a lot
Christoforos [Greece]
yasou christoforos,
what happens when you plug in other USB devices, like a portable storage device or a mouse or something? Something could be wrong with your motherboard or hopefully just the OS. What model laptop is it?

[Q] Dodgy USB connection

When I connect my Nexus 4 to my MacBook Pro and try to transfer files (or even just connecting it, not doing anything) my phone just comes in and out of connection. I know when my phone is connected when the File Transfer program (downloaded from Google) pops up.
The File Transfer program just randomly opens and closes, and sometimes when I'm in the middle of transferring a big file my phone disconnects and I have to start the transfer all over again (really frustrating).
I wonder if anyone else had this problem, or if anyone know of a culprit that could be causing this connection problem.
Anyone?! D:
bump
Oh boy, no one?
Sounds like a dodgy USB cable or port. Try switching both. If it still happens, connect to a windows PC to see if it's the phone.
Not sure what the problem is but I have this happen on occasion too. I'm running Windows 7 so it's not a Mac issue.
I have problems with certain usb cables, some work and some don't. I get the best results using the usb cable that came with the phone, it has never given me a problem.
kzoodroid said:
I have problems with certain usb cables, some work and some don't. I get the best results using the usb cable that came with the phone, it has never given me a problem.
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I have better results using my old Vibrant usb cable. OEM is kind of crappy for some reason. Once and a while I can unplug the charger from the wall and phone and still have some kind of electrical buzzing in the charger.
the OEM (Stock USB that came with my phone) charger doesn't give me any trouble either.
When I plug it in my laptop to charge, the charging is spotty (I assume because the electric output from the laptop is not strong enough). So I plug it into a wall outlet, no problem.
It's only when I connect to a computer when the connection gets interrupted and messes up my file transfers, annoyingly... so me and md5 are best friends now.
I just don't know if there is something causing this besides the phone, or is it the phone itself (so i can contemplate RMA)
If others have this issue then I want to know if they fixed it or found a workaround...
mastrgamr said:
the OEM (Stock USB that came with my phone) charger doesn't give me any trouble either.
When I plug it in my laptop to charge, the charging is spotty (I assume because the electric output from the laptop is not strong enough). So I plug it into a wall outlet, no problem.
It's only when I connect to a computer when the connection gets interrupted and messes up my file transfers, annoyingly... so me and md5 are best friends now.
I just don't know if there is something causing this besides the phone, or is it the phone itself (so i can contemplate RMA)
If others have this issue then I want to know if they fixed it or found a workaround...
Click to expand...
Click to collapse
When I plug my phone into my desktop pc with an alternate usb cable I have it constantly disconnects and reconnects. As soon as I use the stock usb cable it stops doing it and works. I really haven't looked to see what the difference is between the cables could just be that the alternate I use is just cheap. The other cable works fine with my other phones too so its weird.

[Q] how to disable USB PC CONNECTION?

So here is what I'm trying to do... I want to disable the usb pc connection, because I have noticed that my phone charges very slow when connected to the computer, compared to when I have it charging to the wall outlet...
is there anyway to disable this feature so that I can just have my phone charging through the computer without enabling the pc connection?
I know on older previous versions of Android, when plugged to a computer you would get prompt with some options to choose (mass storage, kies, charge only, etc)
Is there anything similar available for the i337?
Sent from my SAMSUNG-SGH-I337 using xda premium
idrummer said:
So here is what I'm trying to do... I want to disable the usb pc connection, because I have noticed that my phone charges very slow when connected to the computer, compared to when I have it charging to the wall outlet...
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Click to collapse
The data connection to the PC isn't causing slow charging.
Your PC's USB port most likely only puts out 0.5A, while the wall charger puts out 2A. (my numbers may not be exact, but the theory is the same).
Exactly as stated above. USB 2.0 only allows 500ma of charging power vs 2.0amps (2000ma) for the charger that is supplied with the S4.
I wish phone makers would start getting with USB 3.0 Standard. If they had a 3.0 connector on the USB cables supplied, USB 3.0 can supply up to 1.5amps, and potentially up to 5amp.
As an aside: the SGS4 only allows for MTP and PTP connections...
There is a way to allow Mass Storage mode, but I wouldn't recommend it, so I won't provide any more details on that.

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