[Q] Re: Samsung Galaxy S2 (l9100) Car USB internal mount - General Questions and Answers

Hi all, I've been waiting and searching around seeing if I was able to find any kind of fix or something for some time now but it's beginning to get to me far too much.
My problem is when I had the HTC Aria I used to have the audio stored on my phone and plug it into my car's USB connection and the headunit would search the device and find all audio to play through the headunit which I was then able to use my controls on the steering wheel. After some time I bought the Samsung Galaxy S2 (l9100) and to my excitement received the whopping 16GB internal storage as a bonus, so I filled that. And heres where my problem comes in, I cant seem to make my headunit search the internal storage and play all that music, It will only search the SD card (external).
Now from reading all over the internet I've been led to believe by any posts that relate somewhat to this that it wont be possible for this to work, what frustrates me though is that it is possible. I've rooted and flashed various custom ROM's to my device (VillianROM first, Cyanogenmod Nightlies second and now MIUI yesterday). I have successfully had the headunit read my internal (newer and more songs) upon connection twice that I can recall now, I think the first time was after first connection to the car after the cyanogenmod flash and today when I first connected it again. Which led me to believe that it was working and then was just applying a new theme on my phone while hanging at a friends then was taking another friend home and plugged it in and back to only reading from my SD card (external - old crap music) and can't figure out why it has worked twice if it is not possible.
The reason why I am determined to figure this out is due to 16 GB internal storage and only 1 GB external storage and I wish to use my phone to its full potential.
While I'm at it, I guess I should mention my other problem which adds to my determination to get the USB connection working with my car. The USB connection is a much clearer & louder playback (Higher quality) then the AUX (current alternative) and to be safer while driving by using my steering controls.
But since flashing to Cyanogenmod and MIUI (cannot recall whether I had this problem on VillainROM) I've noticed the volume in headset mode (when I have something plugged into the headphone jack - ie, AUX, etc) and I begin turning up the volume from quietest to loudest it get notably louder each press until halfway or a press before halfway and then does not become any louder, which I also think may be making the audio less clear and loud when connected via AUX to my car.
Thanks in advance to anyone whom contributes.
I am usually stubborn enough to sort problems out myself, but for the first time I am asking for help on a community forum.

Anyone have any idea what I'm talking about?
If you need to know anything else don't hesitate to ask.

CM7 volume is a known issues or least it was last time I checked.
Try turning on/off usb debugging is my best guess.

Done that, today at some point it randomly read my internal storage and right now I'm constantly reconnecting it with no success.
The frustration continues as it is obviously possible but appears to have a mind of its own.
With my little knowledge when it comes to android and their platform, is it possible it could be there mount priority of the storage or the internal having something stored on it such as an app that could be in use by the phone which could be preventing the drive from being read?

what the hell... I have the exact OPPOSITE problem.
With my headunit its been only mounting the internal storage, but most of my music I put them in the external since I got a 32gb card!
Could it be mounting the smaller sized storage first? =P
-EDIT-
Actually it should be easier to do it the way you want it to (i.e mount internal only)
just unmount the sd card via the android settings -> storage -> unmount
and once it is unmounted, connect the usb to the car.
The catch is of course if you wanna use the external again you have to manually mount it via the settings.

more info but no real help
I have seen a very similar problem and I feel like I can reproduce it.
I've got a 2010 Hyundai Tucson - it has a USB/aux port in the dash console and can accept anything that can be mounted as flash media, flash drives, ipods, etc can all play back music using the Nav display to browse and playback files from the device.
The stereo plays back music perfectly through both my wife's old and new phones. An original MyTouch 3g and a MyTouch 4g. She's had no problem mounting and reading the files from her internal storage. She can playback music on her phone, the car even remembers her place and resumes where she stopped a song.
I, on the other hand, cannot easily get the car to playback files from my older or newer phone. I started with the original android, the HTC Dream/TMobile G1 then later upgraded to a Samsung Galaxy S 3g/TMob Vibrant. What's the difference? I've run modded android OS on my phones and my wife has not. I had been running CM5 and later CM6 on the G1/Dream until I retired it. Lately I've been using a MIUI mod, Lithium 360, on the Vibrant.
When I plug in to the USB on the car, the phone gives me the mount prompt and the car begins searching for files. Eventually both fail to make any progress.
I've tried many fixes including turning on/off USB debugging, I've tried wiping Dalvik cache, Wiping regular cache, I believe I even did a factory reset, flash zip, full re-install on a road trip just to see if I could get the car to read my files. What I did discover is that the problem is simply not hardware related. I could boot to recovery and use clockwork to mount USB storage. Files were seen instantly and played back fine. However, this doesn't do me any good as I can't really use the device for anything else (safety first ) and not to mention that there's no way I want to run the phone with the screen on for hours. I know there are simple workarounds here. But carrying an aux/patch cable is an extra hassle, and since my phone can hold enough data for my average means, I often don't remember to bring a flash drive with me everywhere. Besides, the USB cable in the dash does double duty, charging while giving access to files.
To be fair, I've only used CM based mods (according to wikipedia, MIUI is somewhat based on Cyanogen) on my phone and have not tried out any other android software. I don't know if that's a connection or not, but it's the only lead I have right now. There's got to be something different about the USB settings in the OS itself compared to stock Android. Is there an apk file one could flash and test somehow?
---------- Post added at 04:56 AM ---------- Previous post was at 04:49 AM ----------
http://forum.xda-developers.com/showthread.php?t=617333&highlight=car+stereo
This thread is above seems to be describing the same problem. This however appears to be an aftermarket stereo.

[Q] After mounting it *immediately* dismounts
Connecting to a Samsung TV (USB debugging ON and clicked on USB Storage until it turns from green to orange) and then browsing USB (Menu => USB device) it mounts the USB ("Android 11GB" which is presumably the internal SD) and then dismounts within a second and restarts initializing. An ordinary USB stick (single file system) does mount.
Is this because the Galaxy S2 mounts two file systems at a time and the TV cannot handle this. Is there an app which only mounts ONE filesystem on the Galaxy ?

Related

Car Stereo Questions

Was wondering what experience people had with using their captivate with their car stereos. Preferably via usb cable. If so, how much success are you having? Experiencing any problems? If not, how do you have your usb settings configured. I just bought a pioneer avh-p4200dvd and it gets hung "reading data". Was really hoping to get this working via usb as I dont have the cash to fork over for the bluetooth addon just yet. Any thoughts and help would be much appreciated.
Read the manual for the radio to see what it expects. I would imagine that you'll have to set the phone to mass storage mode. Some HU's have strict rules to where the audio files are located. Some have folder limits. Some require the mass storage to be formatted certain way. Some can only read fat16 formatted mass storage, some can read fat32. Hope this helps. Good luck.
Most headunits can do bluetooth now and works really well to stream bluetooth, but put in mass storage mode and u will prob need ext sd card not the main one. and that should work

[Q] How to mount only external SD?

Whenever I plug in the phone to my computer via USB, it loads it as two separate drive letters. This is fine and good for the PC side of things.
The problem is that I want to be able to use the phone's external SD as a mass storage device that attaches to a new car's USB port. The car always throws back an "unsupported" error, and I'm betting it has everything to do with the fact that the phone tries to mount the 2 cards. The car just doesn't know how to handle that information.
So, does anyone know of a tweak or setting that would force the phone to only mount one or the other, preferably the external?
I've removed the external SD card and plugged the phone in to the car. It doesn't error out now, but I didn't give it ample time to find music hidden in the internal SD.
That being the case, I still would like to know if there is a way to disable USB mass storage for one or the other without having to shift things around all the time. There's a reason why all of my music is on the external SD--it's a 16GB card and I have a ton of music.
The only way I can think of is by mounting it in clockwork recovery console. That would give you access to the music...but you'd lose the functionality of the phone during that time, so doesn't seem like it would be a viable route for you to take...but I suppose if you wanted to do bug testing to see if your external WOULD mount to your cars usb, that's one way to check that out.
Hope this helps.
I'll give that a try this afternoon. You're right, though, it does defeat the purpose--I'd really like a functioning phone while I drive. I'm sure there's a way to adjust this, I just don't know enough about the inner workings to make it happen.
Hello devitec,
I have the same Problem in a BMW with a Samsung Galaxy SII phone. I have no satisfying solution but I can use below workaround.
The BMW cannot mount both drives, but he chooses randomly one of the two. Because there are no music-files on the internal sd, it gives me an errormessage. On every second try i get the external sd which is browsable like a usb-stick. The album- and artist-informations are not parsed for the BMW-filterfunctions, so i can only choose by directory.
I hope this workaround will also work in your car.
max01001111
P.S.: The Samsung galaxy SII has to be in debug mode to mount without kies-support.
what if you guys try to unmount the internal sd before you connect ur phone to ur car?
Sent from my LG-P999 using XDA App

[Q] Connecting USB to car

IDK if this was a feature of HTC/Sense and/or my vehicle but right now with my NS4G when I connect to my vehicle via USB it will charge but not be recognized. On my old HTC Hero 200 and Aria to my Ford Edge it would play no problem all I did was chose mass storage and basically made it a USB. My NS4G though now in my Suburban I plug it in and it gives me a cannot read data msg. Ive tried converting my files to different formats and moving them from the phone to the SD card. Has anyone else had any problems like this. I know I can just plug in to an aux input jack but itd be nice to have just one hidden cable charging and playing at the same time inside my middle armrest box.

[Q] TF300t USB stick and file issue.

My problem is a fairly unique one in that its happening only on the USB stick that is used for music storage on my car deck. The symptoms are as follows and ive tried many things (see bellow) so i put it out there:
When copying .mp3 files to my USB flash drive to load them onto my car the car deck no longer recognizes them at all. They are not present on the list at all. Once i successfully got the file to be seen but it wasnt recognized and my deck threw a hissy fit.
With my usage of tablet a full sized USB is a must. If the tablet doesnt have it then its useless for me as i do alot of file transfers for clients and personal. My tabet previous to this was a Acer Iconia A200 with built in USB and android 4.1 and no such problems existed. Windows can see and read the files I put on any USB disk so its not a problem for workplace, its only happening with the car stereo.
Has android 4.2 changed something in the file transfer protocols for USB?
Attempts to fix include; buying a usb stick that is only a microSD adapter and using MicroSD to transfer files and SD as well. Various file viewing apps including all the top ones in the Market and the Asus factory app. Forum searching, hoever, due to the problem being only with my car stereo I found nothing. When using windows I can see the files so I copy them off and back onto the flash drive then the car dec can see and play the files.
Please help if you can.
:cyclops:

Chinese WinCE 6.0 car stereo switching between USB functions

Hello everyone!
I hope there isn't a topic already for this, but I searched and didn't find anything, mostly also because it's kind of difficult to describe my problem.
To begin with. I have one of those chinese car stereos that run WinCE 6 in my car. It's not the first one, I actually went through quite few of them to finally find one that suits me. I thought I did, and mostly it's true, but there is still one feature that bugs me a bit.
My stereo has two USB ports. One, mini-USB on front - for music/videos/pics, second, full size USB on the back - for 3G/WiFi adaptor. This is as described by the manufacturer/seller.
Now, obviously, many of us would think, that since it's "universal serial bus", it shouldn't matter what I put in which port. So the rear port should accept music on USB flash drive and front port should work with 3G modem. Right? Right? Wrooong!!!
For whatever reason, my stereo only accepts music in the front port, with annoying little cable that is to convert the mini-USB to full size, just bumping up and down as I drive. Also, since I have a built-in USB port, which I would like to use for this and plug it's connection to rear port on the stereo, bugs me a lot.
But no, the rear port only works with the 3G modem and seems to completely ignore any flash drive connected to it.
What's funny though is, that the front port actually works with the 3G modem too! So the front is a "2in1", but the rear is only designated for 3G/WiFi.
Since I don't want to let this just go and get used to it (+ my OCD is fighting heavilly with me on this, lol ), I started to look around to figure out what might cause this. I loaded Total Commander on the unit and plugged two flash drives to the stereo. Both with music files, both formatted the same. In totalcmd it showed them as USB (front) and USB1 (rear) (or something similar, the key part is the "1"). It always added the "1" to the rear one, even though it was connected alone, without the front one.
Now, this is where I believe the problem is. I think/hope/wish that the music application on the stereo only works when pointed to the "USB" (front) device. Since there is probably no way to decrypt and re-program the music app, I was thinking about renaming the USB connections, or, basically switching them for each other.
So to get (finally) to the bottom of my question, is there a way to switch the description/name/purpose of the USB ports in WinCE 6.0 platform, preferably of course in a way that it would stay like that even after restart?
Many many thanks for any help or pointing me to the right direction! Also please let me know if there is some detail that might help identifying the problem.
Today I installed an app called USB Device Info from the play store. What it shows is that it cannot connect because of SeLinux.. CLUE?? So I went ahead and looked on how to connect via USB with Linux. I downloaded Terminus from Play Store and was able to read the files. Previously, I read it's a 'read only' connection. I'm researching how to change the 'read only' to 'read and write', and also extract and find these files. I'm currently looking for my "extracted files".

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