Coby 8048 Recovery, Custom ROM

Discussion in 'Coby Generation 3 Development' started by vampirefo., Dec 15, 2012.

  1. vampirefo.

    vampirefo. Senior Member Developer

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    This isn't good, WiFi can be different from tablet to tablet, Coby used many different WiFi drivers.
    Had you made a backup, we could have got your WiFi working by switching the drivers.

    Sent from my SPH-D710 using Android Tablet
     
  2. craw405

    craw405 Member

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    Do you know if there is a different ROM for these chips that may work? Or if there is a way to try different wi-fi drivers? Im guessing this has to be configured at the programming level instead of some type of install?
     
  3. vampirefo.

    vampirefo. Senior Member Developer

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    No I don't know of any other Rom, most people just don't backup their firmware.
    You can look in the dump request thread and see if anyone uploaded a dump.

    There is a possible fix, flashing another kernel your stock kernel may not be able to load the WiFi module in this Rom.
    May or May not work, but there is a chance your kernel is different.

    Sent from my SPH-D710 using Android Tablet
     
    Last edited: Oct 29, 2013
  4. kgb999

    kgb999 Member

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    I see that this is an unsupported patch ... and I'm running it on an unsupported device even. But I was hoping someone might have insight into a problem I'm running up against.

    The device is a MID7046, originally configured using the resources on this thread. That resource worked well, but the play store didn't list some stuff due to compatibility issues; specifically the game that led to all this in the first place. So I went ahead and installed this patch, and it certainly seemed to work. The desired game appeared for purchase. The problem now is with games that explicitly want to install on the sdcard - they report unable to install on USB or SD.

    From the logs, it looks like the problems arise somewhere in a sequence that starts:

    01-27 17:33:32.940: D/VoldCmdListener(866): asec create smdl2tmp1 21 fat {} 10039

    The process proceeds to format a volume raising few sanity complaints, and then the log shows this sequence:

    01-27 17:33:46.950: W/MountService(991): mountPoint =/mnt/sdcard
    01-27 17:33:46.950: D/VoldCmdListener(866): asec path smdl2tmp1
    01-27 17:33:46.950: W/Vold(866): getAsecMountPath: /mnt/asec/smdl2tmp1
    01-27 17:33:46.950: I/DefContainer(2092): Created container for smdl2tmp1 at path : /mnt/asec/smdl2tmp1
    01-27 17:33:47.520: E/DefContainer(2092): Failed to copy /data/data/com.android.providers.downloads/cache/downloadfile.apk to /mnt/asec/smdl2tmp1/pkg.apk
    01-27 17:33:47.600: D/VoldCmdListener(866): asec destroy smdl2tmp1 force
    01-27 17:33:47.780: W/ActivityManager(991): No content provider found for permission revoke: file:///data/data/com.android.providers.downloads/cache/downloadfile.apk

    Something about Linux that confuses. It seems like /mnt/asec/smdl2tmp1 is created; but seemingly as a new volume rather than a directory? For some reason the install file can not be copied to it. It looks like *some* sort of permission issue, but I can't out what exactly is happening.

    Anyone have any thoughts on a direction to go in trying to attack this?
     
  5. vampirefo.

    vampirefo. Senior Member Developer

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    Looks like a paid app not getting correct permissions, I don't provide support on apps, talk to the author of the app.

    Make sure you can read and write to sdcard, then make sure you have a valid license for the app.
     
    Last edited: Jan 26, 2014
  6. mikeataol

    mikeataol Member

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    okay

    so I was like some others, I had an 8048 that refused to mount the internal sd card
    I said okay , ill look for the stock or a custom rom
    I got the stock_8048_root_gapps_signed.zip above
    looked great , but

    like others I had no wifi when it flashed

    lucky for me I had another unmodified 8048 (I rooted THIS one with SRS root, not the flash from this thread)
    I tried using the utilites on the site , but long story short

    I didnt end up installing cwm on either one, but through adb shell commands, backup up system on good unit, and overlaid it on mucked up unit
    lots of force closes as the system directory was being replaced, but after replacing the /system, rebooted into recovery, did a factory reset, unit rebooted (long first reboot) and seems to run fine, with root, gapps and wifi, and a mounted internal SD.

    there is a copy of Coby8048 system.tgz from the clean unit here: Coby8048system (totally stock except it has the root applied by SRS Root)

    since I had so much trouble getting a stock rom, and none had been posted here,
    just giving this back in case it helps someone out

    (really, I tried to use the dump utility but the mount points look totally different and the only data created was the system.tgz)

    perhaps someone can do a diff on the two directories and pinpoint why wifi isnt working after the stock & gapps flash
     
    Last edited: Mar 5, 2014
  7. Traveller

    Traveller Administrator Staff Member

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    If this is just the system.tgz file, the dump is not going to be all that useful. Stock boot.img, bootloader.img, and recovery.img also need to be included.
     
  8. mikeataol

    mikeataol Member

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    as I mentioned, the dump utility is looking for mount points that dont seem to exist on these units

    I didnt research it in great detail, just took the pragmatic approach.

    the utitlity appears to be looking for nandxxx mounts, these have mtdblkxxx mounts

    it was enough for me to get back to a working unit with a mounting internal SD card, I did end up running the remove gapps script as well,
    I started getting process.android.media force closes after a while.

    app_45@android:/ # cd /dev
    app_45@android:/dev # cd block
    app_45@android:/dev/block # ls
    loop0
    loop1
    loop2
    loop3
    loop4
    loop5
    loop6
    loop7
    mtdblock0
    mtdblock1
    mtdblock2
    mtdblock3
    mtdblock4
    mtdblock5
    mtdblock6
    mtdblock7
    mtdblock8
    ndda
    ndda1
    vold

    from the utility
    Echo º Dumping bootloader. ºÛ
    Echo º ºÛ
    Echo ÈÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍͼÛ
    Echo ßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßß
    Echo.
    Echo.
    adb.exe shell su -c "cat /dev/block/nanda > /sdcard/dump/bootloader.img" > NUL
    @ping localhost -n 5 > NUL
    ÉÍÍÍÍÍÍÍÍÍÍÍÍ[Coby Gen. 3]-Root UtilityÍÍÍÍÍÍÍÍÍÍÍ»
    Echo º ºÛ
    Echo º Dumping boot image. ºÛ
    Echo º ºÛ
    Echo ÈÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍͼÛ
    Echo ßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßß
    Echo.
    Echo.
    adb.exe shell su -c "cat /dev/block/nandc > /sdcard/dump/boot.img" > NUL
    @ping localhost -n 5 > NUL
    Echo º Dumping recovery image. ºÛ
    Echo º ºÛ
    Echo ÈÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍͼÛ
    Echo ßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßßß
    Echo.
    Echo.
    adb.exe shell su -c "cat /dev/block/nandg > /sdcard/dump/recovery.img" > NUL
    @ping localhost -n 5 > NUL
     
    Last edited: Mar 5, 2014
  9. Traveller

    Traveller Administrator Staff Member

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    You'll need to manually enter the commands once you find the mount points. The dump utility is geared towards the first crop of Generation 3 tablets and Coby changed the system layout for the 9740 and later units.
     
  10. AGh44

    AGh44 Junior Member

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    I will need some help as well please!My Coby Kyros Mid8048 get locked as well.Actually my kid use to many times the pattern so now is shows only Too many pattern attempts and it dosent let me do nothing. It only ask for the email account and password something that i dont remeber.i did download the androit development tool and i am using the adb commands but no luck my device keeps telling me that access denied.when i use the adb devices is shows me that is connected and recognize the device.list of devices attached 00001211131249170690 device.Please give me some steps how i can process to unlock my tablet
    Thank you
     
  11. LordBaal

    LordBaal Senior Member

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    I think the only thing you can do is a factory reset.
     
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  12. Traveller

    Traveller Administrator Staff Member

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    As LordBaal said, a factory reset is the only option, unless you know the email address and password used for the account.
     
    • Like Like x 2
  13. Jack Dawlen

    Jack Dawlen Junior Member

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    THis stock ROM is bad....when you flash it, your devices will lost wifi driver..just install Gapps....DO NOT FLASH ROM....
     
  14. vampirefo.

    vampirefo. Senior Member Developer

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    The rom is fine, Coby made several versions of this tablet, each version is different.
    This rom works on the version it was pulled from.

    sent from my kingSing T1 via taptalk
     
  15. Jack Dawlen

    Jack Dawlen Junior Member

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    if someone dont know this problem....you are a destructor of their tablet....
     

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