It appears my A100 decided that it wanted to nearly 100% brick itself last night.
I'm stuck with only recovery at the moment and it is reporting that /dev/block/mmcblk0p4 and /dev/block/mmcblk0p8 are not found. I've tried plugging it into usb while in recovery to see about using ADB shell to recover the partitions but I cannot seem to get the USB drivers to recognize the device.
Anyone have ideas on what I can do as a next step?
Thanks to pio_maski and linuxsociety for helping us all out. For those just joining the thread:
pio_masaki said:
For everyone having the missing partitions error in this thread, once it starts its done, it began when the first freeze occurred.
At this point you have 2 choices, neither is fun and both involve Acer.
1 send it now and get charged for repair, they'll know its modded.
2 try to trigger fail safe and just plug it in, turn it on and let it sit and try to boot into android. After a set amount of failed /system or /boot reads it'll go into fail safe mode. Sending it under warranty in this state will have it repaired at no code aside from shipping to Acer.
You'll know fail safe is happening when you turn it on, blue or orange light comes on but the screen is off and there is no vibration on power on.
Both ways:
Get onto the Acer site and start a chat with a rep, tell them what happened. They'll ask you to hard reset after verifying warranty is still in effect time wise. After it fails this, they'll give you the info on sending it in. For me it took 10 days to get it back from sending it out.
Edit: for anyone that can still boot but hangs up, recovery may still be possible but its a very small window.
Click to expand...
Click to collapse
linuxsociety said:
If you have the brick, then there isn't any options left except to send it in to Acer for repair. They won't say anything about your ROMS/Kernels, however you need to find out if the stock bootloader needs to be re-flashed, and this will pretty much lock them out of recovery and everything when you do. They'll just end up replacing the board in the tablet and sending it back. I'm not 100% sure if anyone has sent their tablet in to acer with the a200 bootloader still intact and received their repaired tablet without a hassle, really that's the main thing you may want to check into.
Click to expand...
Click to collapse
I had the same thing happen to me last night.
Curious to know if you all were using stock kernels or a custom one? if custom which one?
linuxsociety said:
Curious to know if you all were using stock kernels or a custom one? if custom which one?
Click to expand...
Click to collapse
I believe mine was a stock kernel. I was using an unlocked boot loader, clockwork recovery 5.5.0.4 (I believe) and CM9 from 2012/07/08. Unfortunately that is about all the information I can provide. I was unable to use adb with CWR so I couldn't pull up more information on the nature of the problem. I ended up sending it back to Acer for warranty and got it back not 24 hours ago.
kemonine96 said:
I believe mine was a stock kernel. I was using an unlocked boot loader, clockwork recovery 5.5.0.4 (I believe) and CM9 from 2012/07/08. Unfortunately that is about all the information I can provide. I was unable to use adb with CWR so I couldn't pull up more information on the nature of the problem. I ended up sending it back to Acer for warranty and got it back not 24 hours ago.
Click to expand...
Click to collapse
The reason I asked was because I have been working on custom kernels and recoveries for the A100 to help in preventing this from happening, so I just wonder if anyone has had the mmc brick bug to occur while using one of my kernels in combination with my twrp recovery that also has userland mmc brick bug prevention patches.
linuxsociety said:
The reason I asked was because I have been working on custom kernels and recoveries for the A100 to help in preventing this from happening, so I just wonder if anyone has had the mmc brick bug to occur while using one of my kernels in combination with my twrp recovery that also has userland mmc brick bug prevention patches.
Click to expand...
Click to collapse
What causes the bug? Is it something preventable in terms of software run? I just got my A100 back from warranty and would prefer it not die in the same spectacular fashion again...
I actually just finished unlocking the bootloader, flashing CWR 5.5.0.4 and re-installing CM9. Would prefer not to do this dance again.
kemonine96 said:
What causes the bug? Is it something preventable in terms of software run? I just got my A100 back from warranty and would prefer it not die in the same spectacular fashion again...
I actually just finished unlocking the bootloader, flashing CWR 5.5.0.4 and re-installing CM9. Would prefer not to do this dance again.
Click to expand...
Click to collapse
The exact cause is unknown, however we do know that parts of the information the GPT partition table contains is wiped. There is no exact cause that we are aware of yet.
I wonder why so many people choose to use CWR over twrp? It would make sense to use CWR on devices that don't have TWRP support, but this one does and has for a while. I've never figured that out as the interface is much more trickier and when I have used it in the past i just seem to easily accidentally do the wrong thing with it. I dunno I guess people get accustomed to using one product and just never switch to something else.
linuxsociety said:
The exact cause is unknown, however we do know that parts of the information the GPT partition table contains is wiped. There is no exact cause that we are aware of yet.
Click to expand...
Click to collapse
Do the more recent recoveries include a good way to re-write the GPT partition table via an adb shell? Seems like if you can re-write the GPT partition table you'd be able to recover the device from mostly dead. Also, does the bug affect data stored on the various partitions? If so, are there images of the various partitions floating around?
linuxsociety said:
I wonder why so many people choose to use CWR over twrp? It would make sense to use CWR on devices that don't have TWRP support, but this one does and has for a while. I've never figured that out as the interface is much more trickier and when I have used it in the past i just seem to easily accidentally do the wrong thing with it. I dunno I guess people get accustomed to using one product and just never switch to something else.
Click to expand...
Click to collapse
Speaking for myself, I find that I can mash the hardware keys more efficiently via muscle memory than touch about a touch screen. Probably my old graybeard keyboard ways shining through...
I considered moving over to TWRP but the last I looked the information was a little lean (~1-2 months ago now probably). I planned on looking closer at it once the JB port is further along for the A100. Figured I'd jump to TWRP when I jump over to JB. I am aware the CM9 versions for the A100 are a bit out of date and I'm working on a build to address that (running repo sync while I'm at work).
kemonine96 said:
What causes the bug? Is it something preventable in terms of software run? I just got my A100 back from warranty and would prefer it not die in the same spectacular fashion again...
I actually just finished unlocking the bootloader, flashing CWR 5.5.0.4 and re-installing CM9. Would prefer not to do this dance again.
Click to expand...
Click to collapse
At this point its an unknown trigger, however the research on it shows Samsung and kindle fire devices with the same emmc we have are prone to the same issue.
As it stands now Linux society has patched the issue for Samsung devices in his kernel for Android and his kernel for twrp, its about the best protection we have at this time. While I may not agree to the trigger with him, its still a step taken against it that may well prove to be what prevents future bricks. Better safe then sorry kind of thing and I would suggest his recovery and kernel for this reason. Plus his kernel has a lot of extra goodies to play with
It works with all existing roms from ICS to JB, stock or modified or CM.
Tapatalked from my Galaxy S II.
pio_masaki said:
At this point its an unknown trigger, however the research on it shows Samsung and kindle fire devices with the same emmc we have are prone to the same issue.
As it stands now Linux society has patched the issue for Samsung devices in his kernel for Android and his kernel for twrp, its about the best protection we have at this time. While I may not agree to the trigger with him, its still a step taken against it that may well prove to be what prevents future bricks. Better safe then sorry kind of thing and I would suggest his recovery and kernel for this reason. Plus his kernel has a lot of extra goodies to play with
It works with all existing roms from ICS to JB, stock or modified or CM.
Tapatalked from my Galaxy S II.
Click to expand...
Click to collapse
You just had to sweeten the deal.... I will definitely add this higher on my ToDo list than I planned. I really don't want to go through the hassles of another warranty.
If it helps right before my device's GPT table died, I saw a massive CPU spike that caused my device to get quite warm. 2 or 3 hard power-offs and power cycles later my device was going out for warranty. After each boot before it went dead the CPU spike problem was still present and the device wouldn't even unlock from the lockscreen.
kemonine96 said:
You just had to sweeten the deal.... I will definitely add this higher on my ToDo list than I planned. I really don't want to go through the hassles of another warranty.
If it helps right before my device's GPT table died, I saw a massive CPU spike that caused my device to get quite warm. 2 or 3 hard power-offs and power cycles later my device was going out for warranty. After each boot before it went dead the CPU spike problem was still present and the device wouldn't even unlock from the lockscreen.
Click to expand...
Click to collapse
That is actually different from normal for emmc bricks, though makes sense too. If the file system is corrupt or missing then it would hog CPU time trying to find the data or fix the damage, if it even could.
Tapatalked from my Galaxy S II.
i think my a100 died just now for the same reason. i was running cm10 preview with 1.5 custom kernel for JB. Is there a way to restore the tablet? any help?
icomar said:
i think my a100 died just now for the same reason. i was running cm10 preview with 1.5 custom kernel for JB. Is there a way to restore the tablet? any help?
Click to expand...
Click to collapse
You need to give more details about what exactly your tablet is doing and what all was you doing when this happened? Can you still get to recovery? When you try to boot does it ever show boot animation? After turning the tablet on does the distorted Acer image still appear? Can you get adb connection at regular boot? Recovery adb? If you can get to recovery can you please give us your recovery.log file also? Thanks
Sent from my A100 using Tapatalk 2
linuxsociety said:
You need to give more details about what exactly your tablet is doing and what all was you doing when this happened? Can you still get to recovery? When you try to boot does it ever show boot animation? After turning the tablet on does the distorted Acer image still appear? Can you get adb connection at regular boot? Recovery adb? If you can get to recovery can you please give us your recovery.log file also? Thanks
Sent from my A100 using Tapatalk 2
Click to expand...
Click to collapse
you are right, so:
1) my tablet was charging, i unlocked it, it freezed. So i pressed the reset button under the tablet. Then it showed boot animation for ever.
2) i can access recovery (clockworkmod recovery) so i flashed cm9 instead of cm10, but the result is always the same, stuck on bootanimation after the distorted acer image that appears. Sometimes the tablet finishes boot, say "upgrading android" but never finishes.
I will try with adb later at home, and if you can tell me how to take the recovery.log i will provide it.
In this case what can i do?
icomar said:
you are right, so:
1) my tablet was charging, i unlocked it, it freezed. So i pressed the reset button under the tablet. Then it showed boot animation for ever.
2) i can access recovery (clockworkmod recovery) so i flashed cm9 instead of cm10, but the result is always the same, stuck on bootanimation after the distorted acer image that appears. Sometimes the tablet finishes boot, say "upgrading android" but never finishes.
I will try with adb later at home, and if you can tell me how to take the recovery.log i will provide it.
In this case what can i do?
Click to expand...
Click to collapse
That's not a brick. backup your apps with titanium backup, reboot wipe data, cache, dalvik, and system. Install your rom, gapps, kernel, etc.. Boot to android and install titanium backup, restore apps + data (only user apps not system!)
Sent from my A100 using Tapatalk 2
hello there, i did what you said (except for the titanium backup thing, i dont care about apps) that is the procedure to flash roms. after flashing the recovery freezed after saying "install completed" so i had to reboot manually the tablet from the power button.
still rom does not work (now the boot animation does not even show up).
PLUS if i try to wipe again the recovery says what you see in the attachment.
It is worse than before, am i right?
linuxsociety said:
That's not a brick. backup your apps with titanium backup, reboot wipe data, cache, dalvik, and system. Install your rom, gapps, kernel, etc.. Boot to android and install titanium backup, restore apps + data (only user apps not system!)
Sent from my A100 using Tapatalk 2
Click to expand...
Click to collapse
He's bricking. If he wipes cache then he will finish the job.
Edit: never mind I didn't see his update.
Tapatalked from my Galaxy S II.
pio_masaki said:
He's bricking. If he wipes cache then he will finish the job.
Edit: never mind I didn't see his update.
Tapatalked from my Galaxy S II.
Click to expand...
Click to collapse
now what? too late?
icomar said:
hello there, i did what you said (except for the titanium backup thing, i dont care about apps) that is the procedure to flash roms. after flashing the recovery freezed after saying "install completed" so i had to reboot manually the tablet from the power button.
still rom does not work (now the boot animation does not even show up).
PLUS if i try to wipe again the recovery says what you see in the attachment.
It is worse than before, am i right?
Click to expand...
Click to collapse
Well it definitely doesn't look good now. So the boot animation was appearing before you tried to do all the wipes and install from CWM? I just wanted to verify that this DID in fact take place while booted into recovery. You may want to discuss this with pio_masaki since he had a brick happen to him recently, and he is quiet knowledgeable with the procedures to try to recover from lost partitions or to verify that you are indeed bricked (lost GPT partition info ) .
stock rom
my tablet(a100)is doing much the same, its stock except for crosix swap-mod ,i plug into pc(win 7) and it says apx not installed..last nite it locked up while reading,..and well..i rebooted it and all i saw was the android..
Hello everyone,
First of all my problem. Since about 2 weeks I started getting random crashes. The phone is unresponsive and the screen goes from really bright to a greenish/grey color (hard to explain). I googled but I didn't find an answer. If anyone here knows the problem that'd be great but I doubt it since there are so many this that could cause this. So now my question is, how can I be certain it's not an software issue? Further info: My phone is rooted, and I didn't change the ROM. However, I don't actually have root permissions and when I open SuperSU it asks me to update the binary which always fails. I tried to Root it again with the Galaxy Toolkit and it says it's already rooted. Also, Under the google logo is a unlocked lock sign.
Thanks
I would recommend you to try some custom stable ROM, based on 4.1.2. CM, AOKP are among top ones.
better make a backup using recovery, and flash a new ROM. It will give you a fresh start with SU too.
If you dont like using a custom ROM, restore an earlier backup if you already have..
marcusabu said:
Hello everyone,
First of all my problem. Since about 2 weeks I started getting random crashes. The phone is unresponsive and the screen goes from really bright to a greenish/grey color (hard to explain). I googled but I didn't find an answer. If anyone here knows the problem that'd be great but I doubt it since there are so many this that could cause this. So now my question is, how can I be certain it's not an software issue? Further info: My phone is rooted, and I didn't change the ROM. However, I don't actually have root permissions and when I open SuperSU it asks me to update the binary which always fails. I tried to Root it again with the Galaxy Toolkit and it says it's already rooted. Also, Under the google logo is a unlocked lock sign.
Thanks
Click to expand...
Click to collapse
ahsanali.pk said:
I would recommend you to try some custom stable ROM, based on 4.1.2. CM, AOKP are among top ones.
better make a backup using recovery, and flash a new ROM. It will give you a fresh start with SU too.
If you dont like using a custom ROM, restore an earlier backup if you already have..
Click to expand...
Click to collapse
My only expercience with custom roms got me into a boot loop, so I don't prefere that. I actually want a "out-of-the-box" phone without any modifications. Therefore I tried a factory reset but that keeps the root and unlock.
marcusabu said:
My only expercience with custom roms got me into a boot loop, so I don't prefere that. I actually want a "out-of-the-box" phone without any modifications. Therefore I tried a factory reset but that keeps the root and unlock.
Click to expand...
Click to collapse
ok, if you want to get the total old look, relock the bootloader, and install official GNex image that comes straight from Google. Hope this sorts the issue out.
Yes, Custom ROMs are a bit time taking to setup in the start, but thats the whole point - a lot of options. I flashed alot of ROMs and luckily, I have had no boot issue still. I think following the proper instructions(which are simply wiping and formatting data, cache, and dalvik) are easily gonna keep the boot loops away.
You can rule out a sw issue by starting fresh.
http://forum.xda-developers.com/showthread.php?t=1626895
Sent from my i9250
Hello All,
I am having an issue with the "USB storage device" on my phone. No matter with ROM I use my computer does not recognize it as a storage device. I've tried plugging into other computers and I get the same result. I've tried unchecking the MTP, rebooting and checking it again. I've tried several different SD cards and nothing seems to be working.
Cyanogenmod 11 2010602 Nightly
Cyanogenmod 11 M6
LiquidSmooth
Not sure what's going on.
Thanks
Eric
I had similar experience with other Roms. The only way I was able to fix this was to do Factory Reset then Re-Flash your Rom. If you tried to restore any backups, the problem will reappear.
I know that's extreme, but unfortunately that's the way it is.
No I wasn't using any backups. I would SuperWipe_Wipe SD before installing the ROMs
Perseus71 said:
I had similar experience with other Roms. The only way I was able to fix this was to do Factory Reset then Re-Flash your Rom. If you tried to restore any backups, the problem will reappear.
I know that's extreme, but unfortunately that's the way it is.
Click to expand...
Click to collapse
Flash stock firmware, then reflash the rom, factory reset and see if that helps.
I dont know about cm/aosp, but on tw, it wasn't intended to use UMS, just MTP. There was an app you could add to enable UMS, I can't remember where exactly, just that it was here on xda. A quick search should find it though. Dont know if it'll work on non tw, been too long since I last looked at it.
Sent from my SGH-T999 using Tapatalk
A lot has happened to my g3 over the last week.
Including rooting it, flashing a custom recovery, flashing a rom, soft bricking it, almost hard bricking it, and then recovering to stock again, and then finally recovering my stuff with the LG recovery tool. And now everything works except for the WiFi. When I turn it on nothing happens, except that I can't turn it off again. It also doesn't show on the notification bar. I tried an app called Wifi Manager. No luck.
Basically the question here is: What's the best way to find out if the issue is hardware or software related? I would be willing to flash it now that I'm more experienced with the matter. But only if it yields results.
Appreciate any help.
akaNeon said:
A lot has happened to my g3 over the last week.
Including rooting it, flashing a custom recovery, flashing a rom, soft bricking it, almost hard bricking it, and then recovering to stock again, and then finally recovering my stuff with the LG recovery tool. And now everything works except for the WiFi. When I turn it on nothing happens, except that I can't turn it off again. It also doesn't show on the notification bar. I tried an app called Wifi Manager. No luck.
Basically the question here is: What's the best way to find out if the issue is hardware or software related? I would be willing to flash it now that I'm more experienced with the matter. But only if it yields results.
Appreciate any help.
Click to expand...
Click to collapse
Just to be clear youve done a CSE Flash right? Not just restoring a TWRP Backup?
Have you dropped the phone?
itsbighead said:
Just to be clear youve done a CSE Flash right? Not just restoring a TWRP Backup?
Have you dropped the phone?
Click to expand...
Click to collapse
Sorry should have closed the thread already.
I did do a CSE flash and flashing a new ROM did solve the problem. Seems to be a pretty rare compatibility problem.
Hello all.
I've read just about every thread on here about these N7 hard bricks to no avail. My 2013 N7 (Wi-Fi) died one day and I hadn't been using it as much so I didn't notice immediately. I went back to use it to find it hard bricked. I think.
I've used Nexus Root Toolkit to flash multiple different builds of 6.0, 5.0 and 4.3, none of which brought the device back. I've locked and unlocked the bootloader thinking the data wipe might help but it didn't. It is weird, because it simply will not boot up. I have no problem getting into bootloader mode, I have the correct factory images downloaded for flo, nothing works.
After each flash, it just sits on the Google splash screen until I turn it off again.
Any suggestions as to what to do here? I don't know what else to do really.
Thanks,
Sam
droidian1441 said:
Hello all.
I've read just about every thread on here about these N7 hard bricks to no avail. My 2013 N7 (Wi-Fi) died one day and I hadn't been using it as much so I didn't notice immediately. I went back to use it to find it hard bricked. I think.
I've used Nexus Root Toolkit to flash multiple different builds of 6.0, 5.0 and 4.3, none of which brought the device back. I've locked and unlocked the bootloader thinking the data wipe might help but it didn't. It is weird, because it simply will not boot up. I have no problem getting into bootloader mode, I have the correct factory images downloaded for flo, nothing works.
After each flash, it just sits on the Google splash screen until I turn it off again.
Any suggestions as to what to do here? I don't know what else to do really.
Thanks,
Sam
Click to expand...
Click to collapse
Sounds like you prefer only stock roms. Do you insist on it? If you do, my suggestion won't be of help. Otherwise, it looks like your hardware still works. This happened to me once, and what I did was install TWRP recovery and wiped everything, then formatted the storage twice (which, depending on the extent of content, might take up to an hour or more each pass). Seemed the old rom left residues in there that prevented the tab from booting up. Then I flashed a custom rom closest to stock and made sure it booted. If you follow this route up to this point, then you can flash a stock rom anew. Good luck.
graphdarnell said:
Sounds like you prefer only stock roms. Do you insist on it? If you do, my suggestion won't be of help. Otherwise, it looks like your hardware still works. This happened to me once, and what I did was install TWRP recovery and wiped everything, then formatted the storage twice (which, depending on the extent of content, might take up to an hour or more each pass). Seemed the old rom left residues in there that prevented the tab from booting up. Then I flashed a custom rom closest to stock and made sure it booted. If you follow this route up to this point, then you can flash a stock rom anew. Good luck.
Click to expand...
Click to collapse
On this tablet I tend to prefer stock roms however I'm not against custom roms. I will give your suggestion a try. Thanks a lot.
Sent from my VS985 4G using Tapatalk
graphdarnell said:
Sounds like you prefer only stock roms. Do you insist on it? If you do, my suggestion won't be of help. Otherwise, it looks like your hardware still works. This happened to me once, and what I did was install TWRP recovery and wiped everything, then formatted the storage twice (which, depending on the extent of content, might take up to an hour or more each pass). Seemed the old rom left residues in there that prevented the tab from booting up. Then I flashed a custom rom closest to stock and made sure it booted. If you follow this route up to this point, then you can flash a stock rom anew. Good luck.
Click to expand...
Click to collapse
Okay. I flashed TWRP recovery however my touchscreen is not working. So I am now back in the corner.
Do you happen to have any other suggestions?
EDIT: Now the screen is working.
It worked! Thanks a lot. I appreciate it.
Sent from my VS985 4G using Tapatalk