yashsingh1/xdaforums huggingface dataset:
[General Questions and Answers] leetree2001:
That's enough to make a bad situation worse!
[General Questions and Answers] vampirefo:
How would installing a recovery make situation worse?
[General Questions and Answers] synius:
the alpha cwm is for working units right?

just so i understand the idea

flash recovery on working device, then with the added adb features creat a backup and sideload that backup voila general idea is it should fix

making sure i understand everything
[General Questions and Answers] TripFX:
was wondering the same

Being my tablet is working i use a different method for flashing which will be posted at a later time. This test is just for the broken tablets to see if they can flash a recovery without issues. CWM isn't ready yet as some bugs need to be worked out however it will boot in cwm and adb does work in it. We are already aware of what needs to be fixed inside cwm so no need to report anything like that. its just can you flash was it fast or slow flashing and can you enter cwm recovery. with a custom recovery i can make a backup for those with broken tabs restore android. also for future convert ubifs to ext4.
[General Questions and Answers] vampirefo:
I use fastboot to flash recoveries, that's what fastboot is for to flash stuff. Hopefully this flashtool for windows will work.
[General Questions and Answers] synius:
how do you flash the recovery on the bootlooped devices i feel outta the loop
[General Questions and Answers] vampirefo:
http://xdaforums.com/showpost.php?p=58785568&postcount=236
[General Questions and Answers] synius:
The tool included loads scatter file change recovery to alpha push download nothing happens without or with device connect before or after pushing download feel silly like I'm missing something
[General Questions and Answers] vampirefo:
Rename the recovery to recovery.img.

I just tested, works just fine on flashing recovery.

---------- Post added at 03:44 PM ---------- Previous post was at 03:43 PM ----------

Just tried it, flashed just fine.
[General Questions and Answers] Total Nerd:
Interesting, it flashed perfectly without a problem? Maybe it's the drivers I was using then... which ones did you use? (Also, I'm installing Windows XP atm to try and test flashing on it)
[General Questions and Answers] vampirefo:
Flashed without any problems, as far as driver goes, did I mention I am a linux guy? No ideal what that means.

I have an old drive that has XP on it, I connect drive to my computer, boot into XP, connect tablet to pc, setup adb, unplug tablet, download what [MENTION=2670928]TripFX[/MENTION] uploaded, rename recovery to recovery.img turn tablet off start flashing app, load scatter file, check recovery, click download plug in tablet.

Unplug tablet boot into recovery.
[General Questions and Answers] Total Nerd:
:rolleyes:

Well, didn't work for me (I have a completely wiped flash, lol, including preloader/bootloader) but not going to give up yet I guess. The device still shows up when plugged into USB as MTK USB Port. Not sure what else I can do, besides go down the list of SP Flash Tools and see if one works... but seeing as I can't do ANYTHING (no readback, no format, no download, literally nothing) without getting S_FT_DRAM_ENABLE_FAILED (4032) or something, I feel like the device is probably trashed. But, I guess I will keep trying the best I can... not much hope for it though at this point I guess. Would be nice to be able to revive the device from zero (completely trashed).

Later tonight I will get to look at the kid's tablets and see what I can grab off them, although it's kinda pointless since TripFX already dumped the ROM and all, but it'll give me a chance to check the offsets on both SPFT tools I used...
[General Questions and Answers] vampirefo:
I didn't wipe anything, only selected recovery then clicked download.

Also uploaded couple of pics.
[General Questions and Answers] Total Nerd:
SPFT = "Latest" SPFT downloaded elsewhere

SPFT-Trip = TripFX's posted SPFT

In this post.

Yeah, that was my mistake from before lol... although, if the SPFT I was using was correct, PRELOADER wasn't even at 0x9000000 for me (checked via ReadBack) and instead seemed to appear at 0x9800000 (I assume SPFT-Trip might produce the correct result and is different?). But, I flashed that area using SPFT with codelover's previous CWM test thinking, oh hey I can just ADB and fix all my problems. Lolnope, the flash made it go from soft brick to hard brick status (implying the offset wasn't correct, and overwrote something else despite what readback said?), I also flash backed my recovery backup with no luck... but hey, at least it flashed good. :P Which, I guess, later somehow messed up SPFT-Trip giving me a "PMT changed. Needs to be downloaded" error... idk, I'm confused as hell at this point... guess I'll get to see with another tablet later. Not even sure why I even tried format & download besides thinking my device is just screwed, lol.

EDIT: I also tried flashing the scatter TripFX posted with his stock dump minus preloader (flashed via SPFT), still was hard bricked (before all the formatting nonsense). So idk, guess I messed up. GGWP, lost a tablet over wanting to get rid of the software volume buttons lmao. Shouldn't have edited build.prop so blindly and carefree thinking what somebody said would work-- and didn't even double check to see if it actually WROTE (or even check the permissions), with no fail-safe setup (I mean, I didn't have a PC or a USB cable to even use for ADB at the time anyway). Guess my next device will probably be something that has a little more support other than yourself, but if this device can be saved, then hell yeah.
[General Questions and Answers] synius:
im using windows 7 ultimate renamed file to recovery.img

loaded scatter checked recovery

mt65xx preloader comes up no driver installed flash tool just times out

the battery logo appears, but thats about it

i dont know what im doing wrong

unless i actually need windows xp for this
[General Questions and Answers] Total Nerd:
http://xdaforums.com/showthread.php?t=2206421

Shouldn't need WinXP.
[General Questions and Answers] synius:
now im just getting

pmt changed for phone it must be downloaded

but it now flashtool recognized the device
[General Questions and Answers] Total Nerd:
Welcome to the club. :P

EDIT: LOL, weird how all the people with working devices can flash it; yet everyone with bricked devices can't (so far).
[General Questions and Answers] vampirefo:
Sounds like what ever you installed to get flash tool to recognize your device, is causing this problem.

---------- Post added at 08:10 PM ---------- Previous post was at 08:07 PM ----------

I am guessing he installed the samething you did, what ever you both installed needs to be removed.
[General Questions and Answers] Total Nerd:
Then give us the drivers that somehow was magically on your harddrive, because if it's the wrong drivers, I want this fixed now. Afaik, without the drivers, it won't be recognized by SP Flash Tool anyway and I don't think TripFX provided us with any "working" ones, so where else are we supposed to get them? http://windows.microsoft.com/en-us/windows/what-is-driver

I also dumped several things from the tablet's flash using those drivers, and the dumps looked good to me, lol. But, if it's the drivers, I want the working ones.
[General Questions and Answers] synius:
i installed the file MTK6577 USB VCOM Driver Installation

used usbdeview to uninstall

getting closer to it working just cant get the right preloader driver i guess
[General Questions and Answers] vampirefo:
The only driver if that's what it's called is from adb, it installs as soon as tablet is hooked up. Nothing magic about it, I followed a guide to setup adb and fastboot on windows, as I don't use windows so don't know much about it.
[General Questions and Answers] Total Nerd:
Hm, tried using the ADB drivers from http://developer.android.com/sdk/win-usb.html but didn't seem to work. What guide was it?
[General Questions and Answers] vampirefo:
http://xdaforums.com/showthread.php?t=2317790
[General Questions and Answers] synius:
installed that minimal-adb and fastboot setup device is not recognized again
[General Questions and Answers] vampirefo:
That is all I know, haven't used windows in 10 years or more, installed adb, hooked tablet to XP, window pop up device found installing adb, also does same thing in recovery mode.

I can adb and fastboot into tablet, can't see sdcard, device manager shows mtp with yellow ?
[General Questions and Answers] vampirefo:
I think you might be on to something here, the drivers most likely are on the device, like I said after I installed adb stuff.

I plugged the tablet into PC, new hardware found and xp started installing stuff, then after flashing recovery, booted into recovery samething happened.

Most likely you need to try on working tablet to get it setup correctly, bricked tablet can't give xp the needed stuff.

sent from my kingSing T1 via taptalk
[General Questions and Answers] TripFX:
i use windows 7 Pro X64 and it took me a few tries to find the right vcom driver that spft would recognize. Dont remember where i found it that worked.
[General Questions and Answers] synius:
On terminal emulator using cat /proc/mtd. Recovery partition. On working tablet shows it at 0x08000000 not 0x09000000. Do I change the scatter file to match
[General Questions and Answers] vampirefo:
I never changed scatter file, only change I made was to rename the recovery to recovery.img, the scatter files works as is for flashing recovery.
[General Questions and Answers] synius:
Could you check cat /proc/mtd I just don't want another paper weight

If its the same then I won't have a worrie
[General Questions and Answers] vampirefo:
root@RCT6773W22:/ # cat /proc/mtd
dev: size erasesize name
mtd0: 01000000 00200000 "preloader"
mtd1: 00400000 00200000 "pro_info"
mtd2: 01800000 00200000 "nvram"
mtd3: 00c00000 00400000 "protect_f"
mtd4: 00400000 00200000 "seccnfg"
mtd5: 00400000 00200000 "uboot"
mtd6: 00800000 00200000 "boot"
mtd7: 00800000 00200000 "recovery"
mtd8: 00400000 00200000 "secstatic"
mtd9: 00c00000 00200000 "misc"
mtd10: 00400000 00200000 "logo"
mtd11: 00c00000 00200000 "expdb"
mtd12: 00800000 00200000 "tee1"
mtd13: 00800000 00200000 "tee2"
mtd14: 00400000 00200000 "kb"
mtd15: 00400000 00200000 "dkb"
mtd16: 40000000 00400000 "system"
mtd17: 30000000 00400000 "cache"
mtd18: 167800000 00400000 "userdata"
mtd19: 3d050000 003f8000 "system"
mtd20: 162b50000 003f8000 "userdata"
mtd21: 2da40000 003f8000 "cache"
root@RCT6773W22:/ #
[General Questions and Answers] TripFX:
same as mine

ALSO for those that are having driver issues. I have now provided the drivers for windows xp and up. if it does not recognize the driver you may have to force it. This tab uses 2 separate drivers in windows. To use SPFT you NEED MediaTek VCOM USB driver and NOT ADB driver. However I have both installed as the vcom driver is only activated when the tab is powered off and plugin to pc via usb cable otherwise in and powered on state it goes back to using adb driver.

Also NOTE i have successfully updated su binary with latest Supersu 2.46 via Normal and CWM/TWRP method using the alpha cwm. SuperSu 2.45 is bugged not sure which other version after 2.40 have same bug as im not going thru the hassel of testing every version to find which ones will fail on updating su binary.
[General Questions and Answers] vampirefo:
I haven't installed this driver, where and how do you install it on XP? what is it's purpose?
[General Questions and Answers] synius:
http://xdaforums.com/showpost.php?p=53854405 This should work has almost every vcom mtk driver there is. Can we get a comfirm on tablets that have been having troubles
[General Questions and Answers] vampirefo:
Does it work on your tablet?
[General Questions and Answers] synius:
I haven't been able to test it myself. Girlfriend dumped coffee in my puter durn fight.. Last night so I need a few parts to get puter operational at the time of post I didn't relieze tripfx posted drivers
[General Questions and Answers] TripFX:
the purpose for this driver is too enable spft (windows) to communicate with the tablet in order to flash.

there's more than one way. but easiest will be

xp and up

click "start"

click "control panel"

xp or icon view on vista and up

click device manger

vista and up (catagory list)

click hardware and sound

click "device manager" under Devices and Printers.

xp and up

with device manager open plug the tablet in to the pc with it powered off.

you will see the list refresh automatically

you the new item that pops up in the list when you pluged in the tab right click it and click update driver.

the rest should be simple if you actually read what it tells you.
[General Questions and Answers] vampirefo:
My XP uses the splash tool just fine without the driver, after looking at what you uploaded, it is just adb file anyway not needed at all, the info needed by XP is pulled from the device.

---------- Post added at 10:53 AM ---------- Previous post was at 10:43 AM ----------

How is the recovery you uploaded on backup and restore?

I and running my tablet from sdcard ext4. I use an ext4 recovery, never tested the recovery you uploaded on restoring.

---------- Post added at 11:11 AM ---------- Previous post was at 10:53 AM ----------

Is this the rom? http://www.needrom.com/download/cube-u27gt-s-mt8127/

Downloading it now, want to see what is in it.

That is a bad rom, system is corrupt, I did find one with a good system, I am looking at the system, to see if i want to install on my tablet or not.

http://mtkfirmware.com/content/cube-u27gt-stock-firmware-mtk-flashing-tools
[General Questions and Answers] TripFX:
i believe a few things wont backup and i have yet to try restore yet as i want to iron out the known bugs first. flashing zips does work. least supersu 2.46 did without any issues. besides a few partitions not backing up right and mtp/usb storage not working everything else seems to be working just fine. no point in trying restore until backup is fix first ;)
[General Questions and Answers] synius:
neither drivers worked im still running into pmt changed on phone

must be something with the devices

im not sure i wanna try on my working device so ill be mailing the defective unit back now

and continue following this closely and wait until the bugs have kinked out then ill eventually put CWM on my device
[General Questions and Answers] codelover:
Sorry i missed you posts, what happened with your tab? bricked? how?

For your info, PMT error has nothing to do with driver, most likely the scatter that i made is not accurate.

I made the scatter based on info from the update.zip provided by vampirefo, however, we are still missing the actual PMT address.

So i used the info from scatter provided by TripX earlier instead, which i doubt it's accuratecy now.

I reviewed the scatter and made some adjustment, hopefully it can work this time.

Please clear your SPFT log folder before you try, then send me the latest logs after you run the test, perhaps i can find something useful there.

If you can provide me remote access (adb through teamviewer), perhaps you can help me to figure out the actual address and sort this thing out.

As for custom recovery, we have identifed the problems and i think i know where to fix, but adding UBIFS to TWRP would need quite a lot of work/time.

So we would like to get some already broken device to flash with SPFT first, to ensure we can recover from brick, and if SPFT is working good,

then we can proceed to test & decide whether to convert to ext4 or not, as that seems to be a better option for customization.
[General Questions and Answers] synius:
Tablet started bootloop after. ota update day after rooting

Gf wants me to mail old unit back in since they replaced it with new unit,

Technically its not my property; her words

Too late already mailed back unfortunately unable to test on bricked device

Good to know it wasn't a driver issue, didn't make sense since it recognized chipset, etc

Makes sense the scatter file was a little incorrect which is why it didn't work hopefully one of the others dealing with this issue can help
[General Questions and Answers] helfulrooting tips:
rooting rca 7 voyager

Hey so yeah I bought that 30$ rca tablet now I'm going tell all you this once,if you want to root your rca tablet use kingroot and u don't even need a computer and while ur at it you should get root checker :D
[General Questions and Answers] synius:
Agreed I used kingroot, but this forum is for bootlooped devices and potential brick fixes once custom recovery is fully functional
[General Questions and Answers] TripFX:
there is over 50 million post stating kingo works to root this tab (sarcasm) as well as iroot. Stop posting useless info thank you
[General Questions and Answers] vampirefo:
I have found an bought the RCA clone DigiLand - 7" - 8GB - Black, really RCA is it's clone but none the less they almost the same tablets.

Will be looking into using mtdroidtools to make a scatter file for the DigiLand MT8127, ubifs tablet, same method should work for RCA model.
[General Questions and Answers] vampirefo:
Droidtools will make a scatter file for these tablet.

I had to use a ext4 system, use a modem from my mtk6592 cell phone, and change /proc/cpuinfo hardware from 8721 to 6592, this tricks droidtools into recognizing the 8721 tablet as a 6592 and then can make a scatter.

Droidtools doesn't support above 6592, but can be tricked into recognizing tablets beyond 6592 as a 6592, allowing it to make scatter files for them.
[General Questions and Answers] Lukas2179:
This is weird. Smart phone flash tool doesn't even try to flash cwm for my tablet and I did everything you guys have been saying.
[General Questions and Answers] vampirefo:
There are too many variables eg to many versions of windows to even try to help, I used an old XP no drivers were needed, other than the ones pulled from tablet. Everyone has mixed results, some can flash some can't.

Nothing was wrong with the tablet I used, tablet was in perfect working order.
[General Questions and Answers] vampirefo:
Here is scatter file for DL701Q It's a very similar tablet to rca 7 voyager.
[General Questions and Answers] vampirefo:
I downloaded U27GT-S_V2.0_20141108 and compared scatter file, I made some changes toward U27GT-S_V2.0_20141108 scatter file.
[General Questions and Answers] synius:
Which scatter to use..

Is there any risk? Using other device scatters?

Is there anybody here with a bootlooped device rdy to start flashing or have these devices been fixed. Seems fewer post from these people with problems

I'm wondering if I flash cwm recovery on my working device do I run into a bricked device or just a bricked recovery in which case I can reflash back to stock and I fixed the bricked recovery issue.

Any news on backup / restore issues?
[General Questions and Answers] vampirefo:
Mine are just to compare only use codelover's for flashing rca tablet, His works on rca tablet mine do not.
[General Questions and Answers] canodroid15:
Hey guys I need a little help, I rooted my tab with iroot, & after installing supersu & trying to update binaries I have no root access, I'm kinda stuck, tried to reroot with kingoroot on PC & still can't get root permission, I had it b4 trying supersu, the su binary IS installed anyone know why this is happening? Its driving me nuts? I even tried a factory reset & started over no matter what method I use to root now it fails, somehow supersu messed me up, any help is GREATLY APPRECIATED! Thanks! I'm not new to this at all, however I am new to MTK devices
[General Questions and Answers] user201:
Tried Kingoroot. Doesn't work.

Update: Updated Kingoroot from 1.3.1 to 1.3.3 and it finally works.

:)
[General Questions and Answers] vampirefo:
The app version works just fine, also flashing cwm recovery then using it to install supersu works great as well.
[General Questions and Answers] TripFX:
nothing new yet on backup/restore. as far as cwm goes on bricking from flash. to be honest not sure about spft method but there is another way to flash without any risk if your tab is fully working and rooted, however it's pointless as it's much easier to fix broken tabs with ext4 instead of ubifs. It would be nice if someone would report back on codelover's scatter file. As soon as someone does and confirms it works we can finally get the rest done for ext4 conversion as well as a fully working cwm\twrp. which is why flashing the current alpha cwm is useless for fixing broken tabs. The test is to make sure we found the correct location before finishing the rest for ext4 conversion. once it's converted and backed. everyone else including broken tabs have a chance to restore there tabs as well as a better recovery then stock.
[General Questions and Answers] vampirefo:
EXT4 is really the way to go, at least for system and cache, data as ubifs is ok, I have my tablet setup as system, cache EXT4 ,data, UBIFS and it runs just fine, I just completed a CWM backup haven't restored.

I use self compiled carliv 5.1 recovery, nontouch ext4 version.

vampirefo@vampirefo-GA-MA78GM-US2H:~/Desktop$ adb remount
remount succeeded
vampirefo@vampirefo-GA-MA78GM-US2H:~/Desktop$ adb shell
root@DL701Q:/ # busybox df -h
Filesystem Size Used Available Use% Mounted on
tmpfs 237.1M 128.0K 237.0M 0% /dev
none 237.1M 0 237.1M 0% /sys/fs/cgroup
tmpfs 237.1M 0 237.1M 0% /mnt/secure
tmpfs 237.1M 0 237.1M 0% /mnt/asec
tmpfs 237.1M 0 237.1M 0% /mnt/obb
tmpfs 237.1M 0 237.1M 0% /storage/emulated
/dev/block/mtdblock16
1007.9M 753.0M 254.9M 75% /system
/dev/ubi0_0 5.2G 703.7M 4.5G 13% /data
/dev/block/mtdblock17
126.0M 4.6M 121.4M 4% /cache
/dev/block/loop0 1.2M 1.2M 0 100% /mnt/cd-rom
/dev/fuse 5.1G 703.7M 4.4G 13% /mnt/shell/emulated
/dev/block/vold/179:1
9.8G 6.4G 3.4G 66% /mnt/media_rw/sdcard1
/dev/fuse 9.8G 6.4G 3.4G 66% /storage/sdcard1
root@DL701Q:/ #

I have uploaded recovery log, perhaps that will help codelover, when you guys decide to convert to EXT4.
[General Questions and Answers] george676:
Hello bro could you do adb pull of your /system dir and upload a zip of it and shoot me a link. please. i really need some files out of the stock system. please bro help me out.:cyclops::highfive::highfive:
[General Questions and Answers] 11fan:
Sorry man, that was a friends tablet...I was just helping him out. I don't have that tablet anymore, give it back weeks ago, if I did I would try to help you out. Sorry!

Mike
[General Questions and Answers] george676:
Hello bro could you do adb pull of your /system dir and upload a zip of it and shoot me a link. please. i really need some files out of the stock system. please bro help me out. I dont want a rom dump as its very hard to unpack with the ubifs FS. I lost some file which is now preventing me from installing updates.:highfive::highfive::highfive:
[General Questions and Answers] synius:
first you cant just pull system.img safety and expect it to work

1.) why is because its running, which is why dev's are working on CWM. to safely pull system the system cant be running, thus we need ADB functions in Recovery; stock recovery doesnt provide

2.)if you did get a pulled system.img from a running device, you can be sure its crupted in someway or missing files that were running at time of pull the very least.

(now im sure there are ways and ill get shot down by someone saying "oh it can be done" if thats true by all means prove me wrong.)

this img is of

/proc/mtd

/proc/partitions

/proc/dumchar_info

im a little confused as to why some partitions dont show, others according to the screenshot are named system in mtd and in dumchar_info mtd16 is named android.

also why is mtd19 is the only partition not show up on dumchar_info

under mtd is named system
[General Questions and Answers] vampirefo:
The best way to pull a system is from a running system. To install system one needs a modified recovery that allows adb in recovery mode.
[General Questions and Answers] synius:
that makes no sense please explain thought it always ended up missing files or crupted