Database Users

[Xoom 2] External HD+Hub+USB Pen: all working simultaneously, no external power

Hey guys,
I asked the other day if about this being possible, and turned out it already is!
I´m a noob, so I´ve just basically tried a little bit. All I did was:
1) Rooted my Xoom 2 10.1" Wifi following the Root Method by Dan Rosenberg
2) Installed "Drive Mount" from the Market (USB Mass Storage Watcher did not work for me)
3) Plugged my USB OTG adapter (http://www.amazon.co.uk/gp/product/B006R0XOLO/ref=oh_o01_s00_i00_details) to my HD IN THE FOLLOWING ORDER: adapter to HD, then both to the Xoom (I was getting constant freezes because I was plugging my HD to the adapter, once the adapter was already connected to the Xoom).
4) With Drive Mount opened, I mounted my old, NTFS, already partitioned, external HD, and it reads it fine!
Not only that, it even gave me enough juice to connect an old Conceptronic USB hub, then my external HD, then a 8 GB USB pen simultaneously, then move a 700 MB movie to and from the USB pen, without problems. I´ve even been able to watch a 4 GB movie from it!
More importantly for me, this actually makes the device capable of making copies on the go, and hopefully, replace the USB pen with a USB card reader, and download photos and movies from you camera to a HD, when you´re on the go. That´s great for me!
Like I said, I´m just a noob, so the only issue is that I have no idea if the Xoom´s battery could be "damaged", or its life expectancy seriously shortened, by connecting that many devices simultaneously. I´d appreciate if you guys could clarify this for me.
Enjoy!

andario said:
... so the only issue is that I have no idea if the Xoom´s battery could be "damaged", or its life expectancy seriously shortened, by connecting that many devices simultaneously.
Click to expand...
Click to collapse
No, as it's a near-certainty (anything else is amateur hour) that Moto installed current-limiting USB "VBus" regulators on the line you're drawing power from (limiting it to 1/2 Amp).

Thx for number 3. When i plug the adapter first to the tablet and then hard drive to adapter , touch screen stops respond (the tablet don't freeze but you can do anything ). I couldn't understand why sometimes worked and some didn't. Strange bug.
Sent from my XOOM 2 ME using Tapatalk

I have the exact same bug on my Xoom 2 Media Edition, also rooted.
When I plugin the USB OTG Adapter first in the Xoom and then a USB Stick in the Adapter the whole touchscreen is turned off, you can only force reboot with the back site hardware keys.
If i plugin the drive to the OTG and then the whole thing in my Xoom all is working great.
Have to try this with a Hub and two drives, would be awesome to save my Raw Files during Holiday.
Hope Moto fixes this bug, because sometimes i forget....

hello pals,
does it really need to root the device to use it as described in here?
can I do the same without rooting my xoom2 (10.1 inch)

Xoom 2 ME owner here, USB OTG working and mounting USB data traveller by kingston, working USB HUB, working mouse, running stock Honeycomb without any mods. Using a homemade OTG adapter.
Just passing...

[OTG] Logitech Keyboard & Mouse Drivers Missing

Before I start, I don't believe this belongs in the Accessories category because it is a software/development question.
I have a standard OTG cable, bought it for my Evo 3d and it works fine. Plugging it into my new Nexus 10 (Unlocked and rooted of course) I got the pleasant surprise that it provides enough power from the tablet alone to power most USB devices (even my 2.5" hard drive!). Now, when I used the OTG cable on my Evo 3d, I was able to plug in my Logitech unifying receiver and connect my mouse and keyboard with no setup required (keyboard just works, mouse shows a cursor). With the Nexus 10, no such luck.
I was able to download the USB Host Diagnostics app from the Play Store, and I can see that it is recognizing the adapter no problem, but it is not loading input drivers or setting them to be input devices.
Dmesg from Evo 3d when plugging in OTG + Logitech receiver with mouse and keyboard: http://pastebin.com/kBbZEwXD
Dmesg from Nexus 10: http://pastebin.com/0yyFZK7u
Now, I know my cable works fine with the Nexus 10 because I can mount mass storage no problem.
I would love for someone with some more knowledge of USB host mode to maybe provide some feedback or support.
I'm more than happy to provide any more information needed.
Thank you ahead of time.
EDIT: Solution
craigacgomez said:
Kernel with Logitech Unifying device support available... Download manta-kernel-cgomez.xxxxxxxx.zip from here (xxxxxxxx would be the date of the kernel)
http://forum.xda-developers.com/showthread.php?t=1998585
Click to expand...
Click to collapse

I'm trying to get this working... I think I have the changes needed... I will let you know soon...

ahorner said:
Before I start, I don't believe this belongs in the Accessories category because it is a software/development question.
I have a standard OTG cable, bought it for my Evo 3d and it works fine. Plugging it into my new Nexus 10 (Unlocked and rooted of course) I got the pleasant surprise that it provides enough power from the tablet alone to power most USB devices (even my 2.5" hard drive!). Now, when I used the OTG cable on my Evo 3d, I was able to plug in my Logitech unifying receiver and connect my mouse and keyboard with no setup required (keyboard just works, mouse shows a cursor). With the Nexus 10, no such luck.
I was able to download the USB Host Diagnostics app from the Play Store, and I can see that it is recognizing the adapter no problem, but it is not loading input drivers or setting them to be input devices.
Dmesg from Evo 3d when plugging in OTG + Logitech receiver with mouse and keyboard: http://pastebin.com/kBbZEwXD
Dmesg from Nexus 10: http://pastebin.com/0yyFZK7u
Now, I know my cable works fine with the Nexus 10 because I can mount mass storage no problem.
I would love for someone with some more knowledge of USB host mode to maybe provide some feedback or support.
I'm more than happy to provide any more information needed.
Thank you ahead of time.
Click to expand...
Click to collapse
Same problem here. I originally bought the combo for my Iconia, which had a full size USB port, but I couldn't get them working on the N10. My wired USB mouse and my DSLR camera both connect and work fine though...
craigacgomez said:
I'm trying to get this working... I think I have the changes needed... I will let you know soon...
Click to expand...
Click to collapse
I hope it ends up being something small and flash-able as a fix, instead of having to flash a completely new ROM. Either way thanks!

OK, I've got the Logitech Unifying support working... tested it with my keyboard and mouse... all good... it's a new kernel... I will upload it soon...

ahorner said:
Before I start, I don't believe this belongs in the Accessories category because it is a software/development question.
I have a standard OTG cable, bought it for my Evo 3d and it works fine. Plugging it into my new Nexus 10 (Unlocked and rooted of course) I got the pleasant surprise that it provides enough power from the tablet alone to power most USB devices (even my 2.5" hard drive!). Now, when I used the OTG cable on my Evo 3d, I was able to plug in my Logitech unifying receiver and connect my mouse and keyboard with no setup required (keyboard just works, mouse shows a cursor). With the Nexus 10, no such luck.
I was able to download the USB Host Diagnostics app from the Play Store, and I can see that it is recognizing the adapter no problem, but it is not loading input drivers or setting them to be input devices.
Dmesg from Evo 3d when plugging in OTG + Logitech receiver with mouse and keyboard: http://pastebin.com/kBbZEwXD
Dmesg from Nexus 10: http://pastebin.com/0yyFZK7u
Now, I know my cable works fine with the Nexus 10 because I can mount mass storage no problem.
I would love for someone with some more knowledge of USB host mode to maybe provide some feedback or support.
I'm more than happy to provide any more information needed.
Thank you ahead of time.
Click to expand...
Click to collapse
For future reference, this belongs in Q & A.

Kernel with Logitech Unifying device support available... Download manta-kernel-cgomez.xxxxxxxx.zip from here (xxxxxxxx would be the date of the kernel)
http://forum.xda-developers.com/showthread.php?t=1998585

Flashed your kernel on my stock rooted firmware and it is working great with my full size logitech keyboard and mouse as well as my mini keyboard/trackpad combo.
Thank you!!
Sent from my Nexus 10 using xda app-developers app

craigacgomez said:
Kernel with Logitech Unifying device support available... Download manta-kernel-cgomez.xxxxxxxx.zip from here (xxxxxxxx would be the date of the kernel)
http://forum.xda-developers.com/showthread.php?t=1998585
Click to expand...
Click to collapse
This works great! Thank you so much!

Logitech Unifying Adapter & Sony Xperia S
Hey guys,
I know I'm in the wrong section but I don't know if I ever can solve this problem:
I have a Sony Xperia S with the newest Jelly Bean .211 and this FW cannot identify my Logitech keyboard with a unifying 2.4GHz adapter. All keyboards and mouses with this adapter don't work. I see with USB Host Controller APP that the adapter is recognized with the right vendor and device id but the Xperia S does nothing. With ICS and GB we hadn't this problem. I think only the drivers are missing. I called the Sony support and they told me to do the same studip thing: factory reset, reflash the FW bla bla... :silly: But it's a FW related problem and so on I'm googling this since 2 months and i cannot find anything to solve this. And today I saw this thread. I hope anyone can tell me which files are needed to recognize my Logitech keyboard on USB OTG as a keyboard and to use it. I saw that this problem was solved for the Nexus 10 but only as a kernel and I need only the files or drivers.
Please help
Regards

Just curious , would this kernel help to make a Logitech steering wheel usable as well ?

[Q] USB Host/OTG not working at all on my N7?

For some reason my Nexus 7 won't recognize any USB device I connect through an USB OTG cable.
I tried several USB-sticks and mice (which should work even without root) without success.
After reading through all related topics I found that most people fixed their problems by buying a different adapter so I went ahead and bought:
1. Micro USB HOST OTG cable adapter on the go for Google Nexus 7 - 7" Tablet ( 330805061387 ),
2. USB OTG On The Go HOST CABLE for Samsung ET-R205U i9100 Galaxy S2 Galaxy Note
and
3. another one that has no cable but the male micro USB plug attached directly to the female type A plug.
None of them work!
I am running PA 2.54 (obviously rooted), tried different kernels. I also did a full wipe and installed other roms that people reported working USB-OTG with, nothing.
I upgraded my bootloader (which has nothing to with it I think, but did it anyways) and tried CWM and now TWRP recovery.
TWRP has native USB-OTG support, but even at recovery level none of the cables/adapters work.
I even cut off some of the plastic coating on of the micro USB plugs as some people claimed they got their cable to work that way...
On my Galaxy Nexus all (!) adapters work flawlessly with all USB-Sticks and mice I tried. In Android and in TWRP recovery (same version as on my N7)
I just ordered another OTG adapter but I honestly don't expect that one to work either.
Now I am beginning to suspect that my N7 is not capable of USB Host mode or OTG at all. Is that even possible?
Charging and connection to my PC works fine though btw.
Has anyone had the same experience?
Any solutions?
I'm thankful for any tips!

You haven't mentioned using Stickmount or a similar app to mount your peripherals. Have you overlooked that step?
I'm not the lowest of the low, but I am the slowest of the slow. 49.6 mpg avg for 38k miles in non-hybrid Scion xB

+1 you need to use stockpiling thought mine was broken till I got that app and now works
Sent from my Nexus 7 using xda app-developers app

Yes, I have stickmount installed. And all other USB otg related apps on play store... No device found.
But as I said, it is not even working in twrp recovery so I suppose it is not android related but something is wrong with the hardware.
I mean it is possible I just got three incompatible otg cables but how can those be the wrong cables anyways? As they all work on my gnexus, they're not broken and USB otg just has pin 4 and 5 connected, so there is nothing special in them either...
Sent from my Nexus 7 using xda app-developers app

I have the same problem except it's with my Galaxy S3, the OTG cable works fine on my Nexus with stickmount pro, but even though my galaxy S3 recognises the external HD I cannot view any of my files
Sent from my Nexus 7 using xda app-developers app

At least your s3 recognizes the hd. My Nexus doesn't recognize any device I plug in. They don't even power up (optical mouse not blinking etc)
Sent from my Nexus 7 using xda app-developers app

Try a custom Rom if you're not already running one, on stock I couldn't even get WiFi Tethering to work never mind external HDD but since flashing liquid smooth ROM its been fine, pity wont work with my Galaxy S3
Sent from my Nexus 7 using xda app-developers app

Using Raspbean Jelly ROM and for me it will recognize my NTFS usb stick but it says it is empty which it is not.

Reeonimus said:
Using Raspbean Jelly ROM and for me it will recognize my NTFS usb stick but it says it is empty which it is not.
Click to expand...
Click to collapse
Are you using stickmount pro and did you download the ntfs files to /sdcard ?

How to put ntfs files to /sdcard?
i have the same problem with not mounting anyhting via ota cable. I have root and latest android 4.2.1, I tried all free android app for mounting and still cant mount anything.
I would love to keep stock rom if possible.
And is it possible to mount usb internet stick (huawei e3131a) with otg? That`s only thing I need.
Sent from my Nexus 7 using xda app-developers app

It's not the Nexus 7's problem . You have to be rooted, have an app like Stickmount to mount the peripherals, have the data in a recognized (EXT, FAT) format, use a compatible USB-OTG cable, and know where Stickmount et al mounts the peripheral.
If you do all that, you'll have full r/w access to your peripherals. I've downloaded photos from my camera's SD card to my N7 using a 4 way card reader, r/w data to/from a USB flash drive, connected to my PC, & attached a wireless keyboard's USB dongle.
I'm not the lowest of the low, but I am the slowest of the slow (49.6 mpg over 38k miles in Scion xB)

I recommend fat32 over fat. If you need support for files over 4Gb you will have to allow for ntfs support with a custom kernel unless Chainfire is getting support built into Stickmount.

I just bought another cable off Amazon which was labeled to work with the N7 and got 100% positive reviews from buyers.
Of course it doesn't work on my device. (works fine on my Galaxy Nexus again...)
Just tried to connect a USB mouse this time.
I installed SmoothRom and ParanoidAndroid on my Nexus 7 and it doesn't work on either. Stock Kernel, franco, bicked - nothing.
Giving up here.
I guess my Nexus just doesn't have OTG support for some reason.
Still thankful for any advice though

bumping the thread again
Hey bastlwastl,
just bumping this thread to ask you if you got any advances with your problem. I have the same problem too- the OTG cable i have works with my friends' Nexus 7, another's Xperia Z, and another's Xperia ** (forgot the model number). they instantly recognize the pendrives AND hard drives (they light up). All three of them aren't rooted or unlocked or anything - i tried it within fews days they made the purchases. So I also suspect this is a fault with MY nexus 7. Did you find anything regarding this?

[Q] Audio over USB with Android 5.0

I know there have been threads in the past about the Nexus 4 not being able to support outputting audio over USB, but now that stock Android 5.0 supports it, can the Nexus 4 do it?
I'm using the factory 5.0 images and I have an external DAC/amp that I want to use (Fiio e18) that's made for Android, but nothing seems to happen when I hook it up. I've read posts that the Nexus 4 physically can't output power over it's USB, which is fine because the DAC has it's own battery source... but can it at least output the audio?
I started with the stock kernel, but also tried the latest Franco kernel (r214) with no luck. Also, I verified the DAC itself works by using it with my laptop. I'm hoping there's just some hidden setting or patch I need to apply to get it to work... Has anyone else tried this yet?

kerb12 said:
I know there have been threads in the past about the Nexus 4 not being able to support outputting audio over USB, but now that stock Android 5.0 supports it, can the Nexus 4 do it?
I'm using the factory 5.0 images and I have an external DAC/amp that I want to use (Fiio e18) that's made for Android, but nothing seems to happen when I hook it up. I've read posts that the Nexus 4 physically can't output power over it's USB, which is fine because the DAC has it's own battery source... but can it at least output the audio?
I started with the stock kernel, but also tried the latest Franco kernel (r214) with no luck. Also, I verified the DAC itself works by using it with my laptop. I'm hoping there's just some hidden setting or patch I need to apply to get it to work... Has anyone else tried this yet?
Click to expand...
Click to collapse
pls report your findings if you can make it happened!!
i can not help you with your problem but it is something that interest me too. i only can suggest to use a more feature enabled kernel like unleashed or hells core
pls report your findings if you make it work mate!

That's a good idea... unfortunately no dice with the latest unleashed kernel either (98u). It claims it supports USB OTG, so I was hoping that would be enough, but maybe there's more that needs to be done.

kerb12 said:
That's a good idea... unfortunately no dice with the latest unleashed kernel either (98u). It claims it supports USB OTG, so I was hoping that would be enough, but maybe there's more that needs to be done.
Click to expand...
Click to collapse
one thing that you might not know. nexus 4 does support usb otg BUT cannot provide electricity via usb. you must use a y cable and provide external power so you it might not be possible to use your DAC!

Thanks, I did know that, but I figured that since my DAC is self-powered (it has its own battery) that I wouldn't need to do the y-cable trick.
Worth a try though, I'm going to order one and see if I can at least get regular USB OTG to work. Maybe once that's working it'll be easier to troubleshoot the audio.

Just wanted to update, I got the Y OTG cable so I could have external power at the same time... but still doesn't work. This is with stock 5.0.1 and unleashed 98u kernel. I went into Synapse and enabled the OTG setting as well. DAC doesn't get recognized, and I tried a few free apps that are supposed to do OTG checks, but they all came back that nothing is attached.

Usb otg is one thing and uab audio out is another. USB otg means that you can connect an USB stick or external hdd to your phone ( with or without external power) USB AUDIO OUT need special circuits from your internal Dac to the USB. If those are not implemented you will never have USB audio out. This is something witch depends on the manufacturer ( S4 mini with snapdragon 400 don't work with USB otg or USB audio out, htc mini 2 M8 works perfectly with fiio E18 as a audio surce for external DAC). So if you really need USB audio out please next time do your homework and read before buying a phone. P.S. Htc mini 2 M8 has the best audio ever and really you don't need an external dac. If you need more power just use your fiio as an amplifier with your phone.
Maybe you could find for your phone a apecial kernel modified for better audio experience. Flash that and use your headphones.
Good luck!

Thanks, yeah I don't need usb audio out... I've had the phone for over 2 years and I still really like it, so no plans on getting a new one just for this.
I believe it's physically possible to do audio out on the N4... I've seen random posts about people getting it to work, but they've all been on custom ROM's based on 4.4.x stuff. I'd really rather not try to reproduce that since 5.0 is running so much better on my phone, and I was just hoping with the new native Android support it might work out of the box. But alas, it looks like google locked down 5.0 on the N4 - even USB OTG storage doesn't work unless you put a custom kernel like unleashed on.
In the meantime, I've just been using it as a headphone amp like you suggest and it's a big improvement.

GPD XD OTG Issues

Hello everyone, I hope this is the right section where to post, I have scrolled down the home page until I've found this one. This is an android console based on Rockchip cpu so I guessed I'd give it a try with my problem. If not please forgive my dumbness and move the thread.
I have bought a GPD XD console that works very flawlessly beside one big huge damn problem I am not able to resolve.
One day I tried to hook it to my TV and looks great. Then I wanted to connect my 360 wired controller via USB otg. No luck. Then I tried ps3. Same. Ps4 controller? Again nothing appears on screen. Mouse, keyboards, flash drives, just nothing. Also updated it to last firmware. Tried 3 usb otg cables, 2 cheap one and one with gold plated connectors that costs more (dunno if this changes).
So I tried some of the methods I've found online to test the otg support and actually otg support is ok. What wasn't ok therefore, is that I had to download 3 xml files and putting then into permissions folder and allow them but still nothing happens. Downloaded then a vold file to put it into etc folder and again nothing works. The apps i've tried all tells me the otg support is ok but find me no otg signal
Actually usb port works for charging the device or make it visible to pc but this damn otg won't work.
I tried almost anything, . I am kinda noob at this but if usb works for charging and pc I can assume is a software issue and not an hardware one, or is it possibile the otg function depends on usb port "broken" even if usb port works for other operations?
Please I would be very glad if you could help me. Since it's passed too much time for a refund and send it back in China for a replacement will costs me a lot and takes like months if not one year as I've read around.

I guess I choose the wrong section

morris83rm said:
I guess I choose the wrong section
Click to expand...
Click to collapse
Hello,
did you find an answer to your problem?
I know that this post is old...

lumpy76 said:
Hello,
did you find an answer to your problem?
I know that this post is old...
Click to expand...
Click to collapse
oh i wish i had. Do you have the same problem?