Database Develop

Help G1 is crashing constantly

Hi, I recently flashed my phone to cyanogens 3.6.8.1 all was well until yesterday when the phone screen displayed vertical lines like a grey color, the phone could receive calls but from t mobile customer service and it was booting up tho I couldn't see the screen. Then I took the sim card out and the screen returned to normal but was stuck in the splash screen. I reflashed and sometime the next day it happened again, this time I took out the sim card and it went back to normal
Any ideas

Jonnibravo said:
Hi, I recently flashed my phone to cyanogens 3.6.8.1 all was well until yesterday when the phone screen displayed vertical lines like a grey color, the phone could receive calls but from t mobile customer service and it was booting up tho I couldn't see the screen. Then I took the sim card out and the screen returned to normal but was stuck in the splash screen. I reflashed and sometime the next day it happened again, this time I took out the sim card and it went back to normal
Any ideas
Click to expand...
Click to collapse
Could you post a log of this? Could you also provide some more details about your set-up (a2sd? swap? comcache? spl/recovery?) and how did you get to this point (did you wipe before flash? did you run any back-up apps, what were you doing when it happened?)
Once we have that info we should be able to figure it out.

I started out with th jesus freak rom then I decieded to flash the cyanogens 3.6.8.1, I had trouble with the market because I hadn't wiped first, I did that and all was well for at least 5 days. I created an ext2 partition for apps2sd but I'm not sure if that worked. Then on the Saturday 6 days later I put fotmob on my phone so I could keep an eye on the opening premiership season put the phone in my pocket whilst at the football and 2 hours later the phone screen was dead, nobody could call me tho I know the phone was operating and booting only t mobile manage to get through, I tried a reboot, then took the sim card out and the screen went back to normal but was stuck on the splash screen. I tried fixing file ext but came as error asomething about the super block being unreadable tried manually but didn't work, tried backup still stuck, reflashed worked fine for. 20 hours then it happened again this time I wasn't doing anything with the phone no programs other than the usual running in the background, this time I removed the sim card and the phone went back to normal again for about 4 hours then it happened again this time removing the sim didn't work.straight away but eventually it came good again.
Its now 11 15 and its running fine again. I have noticed that I now only have one ringtone (dream theme) and one notification tone and I'm getting a few force closes tho I not sure what they are I will report them if and when I see them

you need to get audio resources and unzip to the sd card all the ringers. search xda for audio resources

The screen went dead again at 3pm this time after removing the sim card it stayed the same it was only after leaving the battery off it returned to normal again about 10 minutes later, I am also getting a vending core force close from time to time, please someone help me solve this issue.
P.s I've never actually seen the phone do this it happens when it is in my pocket when I get it out it happens also this time I have not installed any software and it is still happening

Jonnibravo said:
The screen went dead again at 3pm this time after removing the sim card it stayed the same it was only after leaving the battery off it returned to normal again about 10 minutes later, I am also getting a vending core force close from time to time, please someone help me solve this issue.
P.s I've never actually seen the phone do this it happens when it is in my pocket when I get it out it happens also this time I have not installed any software and it is still happening
Click to expand...
Click to collapse
Because you lost your ringtones, it sounds like your SD card is acting funny, I would format it using this guide (make only 2 partitions for the time being, fat32 and ext3).
See if that works...May be complete reflash with wipe wouldn't be a bad idea neither.
That's all I can suggest at this point, I'll need to see a log to be anymore specific, but try this out, sounds like you've got nothing to loose
Good luck.

Thanks for your reply I am very greatful, I have tried a different sd card without setting up partitions and it still happens. I think the latter is true and a complete reflash is definately the thing to do.
I think this may be a hardware issue because as I mentioned it only happens when it has been in my pocket for a while, perhaps it is overheating or something.
I'll try a complete reflash and let you know if it happens again.

Wipe, re-flash, reformat your sd (or take it out altogether, just to rule it out see what happens... This is all I can tell you....
good luck

Help? Battery/Software/SD?

So I've been lurking around this forum ever since the G1 first came out. Messed up on the rooting procedure once, got a replacement a few months ago.
Worked fine so far. A while ago, I flashed the latest SuperD rom. I am using an 8gig SD card. I've overcharged my battery several times by accident, so the health isn't exactly up to out-of-the-box standards.
I noticed the phone entered a random reboot when I turned the music on for a while. As time passed, the random reboots became more and more frequent. Since I couldn't keep the phone on for more than 20 seconds without a reboot, I decided to wipe and flash a new rom today.
I chose Pays 1.6 Rom and flashed that. Didn't wipe my ext4, just wiped and flashed. I figured ext4 wouldn't cause such a problem, so I ignored it for now. Problem not solved.
I turn the phone on, and in the few seconds, I noticed the following:
the apps all show up, meaning the phone reads the ext4 apps (right?.)
The sd card itself displays an error - I can't access music, pics, etc.
Phone service is fine, all apps are normal.
Buuuut there's still that random reboot issue. It reboots, enters a G1 screen, then reboots quicker. In other words, after I take the battery out and reboot, it might take maybe 1 minutes before it auto-reboots. I wait, then it reboots in maybe 30 seconds. And faster and faster, until it doesn't respond anymore and I have to take the battery out again.
I'm not sure what I do causes random reboots. Sometimes it's when I press a button while in the music app. Sometimes it's when I open the keyboard. Sometimes it's just when the screen goes to sleep. It's fairly random.
I can go into recovery (once I take the battery out once.) Fastboot also works.
Running the danger SPL and the second to latest radio (I believe a new one came out recently? Mine's the one with 26)
Help please? What part of my phone is broken?
I'll give additional information if asked. Not sure what parts are relevant.

Sound's like Kernel panic. Wipe everything and install soemthing stable like cyanogens 4.2.15.1 or dwangs rom. Didn't know there was anything worng with SuperD's kernel though.

jaekim708 said:
So I've been lurking around this forum ever since the G1 first came out. Messed up on the rooting procedure once, got a replacement a few months ago.
Worked fine so far. A while ago, I flashed the latest SuperD rom. I am using an 8gig SD card. I've overcharged my battery several times by accident, so the health isn't exactly up to out-of-the-box standards.
I noticed the phone entered a random reboot when I turned the music on for a while. As time passed, the random reboots became more and more frequent. Since I couldn't keep the phone on for more than 20 seconds without a reboot, I decided to wipe and flash a new rom today.
I chose Pays 1.6 Rom and flashed that. Didn't wipe my ext4, just wiped and flashed. I figured ext4 wouldn't cause such a problem, so I ignored it for now. Problem not solved.
I turn the phone on, and in the few seconds, I noticed the following:
the apps all show up, meaning the phone reads the ext4 apps (right?.)
The sd card itself displays an error - I can't access music, pics, etc.
Phone service is fine, all apps are normal.
Buuuut there's still that random reboot issue. It reboots, enters a G1 screen, then reboots quicker. In other words, after I take the battery out and reboot, it might take maybe 1 minutes before it auto-reboots. I wait, then it reboots in maybe 30 seconds. And faster and faster, until it doesn't respond anymore and I have to take the battery out again.
I'm not sure what I do causes random reboots. Sometimes it's when I press a button while in the music app. Sometimes it's when I open the keyboard. Sometimes it's just when the screen goes to sleep. It's fairly random.
I can go into recovery (once I take the battery out once.) Fastboot also works.
Running the danger SPL and the second to latest radio (I believe a new one came out recently? Mine's the one with 26)
Help please? What part of my phone is broken?
I'll give additional information if asked. Not sure what parts are relevant.
Click to expand...
Click to collapse
Since the rom relies on apps to sd I would guess the ext is borked and maybe the fat32 as well. I would reformat the whole thing to fat 32 then reformat to ext2 or 3. Load Dwangs rom for testing (easier to get running just as a test).

So I wiped my SD (ext4, dalvik, fat32) and tried cyanogen. Then I tried Pays. Reboot problem's gone, but neither of them is reading my SD card.
I'm assuming its just a matter of backing up the SD and repartitioning? I'll try that next when I have time.
Thanks for the help guys! Lastly, any ideas on why this happened? It'd be hard to pinpoint the exact reason, but I'm assuming I'm not the only one who had this problem - how did other people get to the situation I'm in?

I wiped all of my SD, repartitioned, wiped the phone, flashed AOSP 1.6. w/ root and "expansion" pack.
Reboots are less frequent, but they still occur too often. They don't occur by themselves - its always when I'm using my phone.
It seems that it reboots more when its connected to my computer. The SD isn't mounted, but the simple fact that its connected seems to trigger reboots more frequently. Is this a coincidence or can a USB cord trigger reboots?
Help please
EDIT: The phone just made an audible cracking sound as it rebooted - like someone stepping on gravel. Hardware issue?

[Q] stock nexus one highly unstable after boot up

my stock nexus one becomes highly unstable after booting up. im running strock 2.2.1, and this issue started apearing recently (after 2.2.1 update). the phone has never had any problems in the past.
whenever i turn the phone on, if i touch it it becomes really laggy and freezes, requiring me to pull the battery. however, if i let it sit for 15-20 minutes and then play with it it works fine, until the next time i shut id down (which can be days). i have performed a factory reset without reinstalling all of my old applications, i have formatted my sd card, and i have checked all the applications that start on boot up, but none of them seam to be the issue (when there was nothing on the phone it still reacted this way)
any suggestions? should i contact htc? this is really annoying.

Before you do, you could try to root and check the logs for anything suspicious (logcat and kmesg). Also you could try to install custom ROM and see if the problem still exists.
If it doesn't help - you should contact HTC.

EErez said:
my stock nexus one becomes highly unstable after booting up. im running strock 2.2.1, and this issue started apearing recently (after 2.2.1 update). the phone has never had any problems in the past.
whenever i turn the phone on, if i touch it it becomes really laggy and freezes, requiring me to pull the battery. however, if i let it sit for 15-20 minutes and then play with it it works fine, until the next time i shut id down (which can be days). i have performed a factory reset without reinstalling all of my old applications, i have formatted my sd card, and i have checked all the applications that start on boot up, but none of them seam to be the issue (when there was nothing on the phone it still reacted this way)
any suggestions? should i contact htc? this is really annoying.
Click to expand...
Click to collapse
Factory reset with formatted card? Has to be something wrong with the phone.

Go to recovery, wipe cache and dalvik cache, and try to boot phone again, often that helps.

tried wiping everything i can through recovery, yet my phone still freezes soon after start up. any chance htc will fix this? i dont want a refurb

Because when system has just booted up, it needs to check SD card and mounts all App2SD applications.
Try to boot your phone without SD and SIM card, see if it solves the issue.

tried removing sim and microsd and all th possible combinations.
it runs great without the microsd, so im guessing that was the issue. ill try another microsd to make sure its not a hardware/software bug related to sds in general but rather an issue with my specific microsd (which isnt the stock one).
thanks for the suggestion. i was very close to sending my phone in to htc (already had a ticket open and a fedex label)

that sounds good perhaps your SD card was corrupted. Connect it to your computer using a card reader, and do a disk check in Windows, see if it can fix any problem. Also try to degragment your SD card.

[Q/Problem] Seems to happen with Every Rom.

I would like to keep this short and sweet so...
Basically heres the low down: I got a G1 almost a year ago, got into Rooting/flashing 7 months ago. I noticed in the beginning almost every rom was giving me a problem, Freezing up, hanging for long periods of time, etc. I eventually found a very nice, stable rom thats been lasting me for about 6 months but as of late was being horrible. Force Closing everytime I got a text message, REALLY Hanging for long periods of time, freezing up. Etc.
So I finally got FED UP, and decide it was time for a change, so I grabbed MLIGN 3.3v having seen so many good reviews and what not, thinking it would be the remedy to my poison. I cried. So in short, here is whats going on:
1. It seems to only wanna cooperate when Plugged into the USB, which, isn't too practical.
2. When not plugged in, it is NOT sluggish, but when loading into apps I've noticed it will hang for quiet awhile or completely lock up to the point only popping out the battery will work.
3. I haven't noticed it yet, but on the old ROM it would randomly shut off during phone calls; which leads me too....
4. When ever I shut the screen off (by pushing endcall) it seems to freeze and lock up and eventually either SHUTOFF or REBOOT into a SHUTOFF of the phone and refuse to turn back on until it has been plugged into the USB, or enough time has passed for it to 'forgive me' and by that, I mean randomly work again.
5: Various other things I cant think of right now.
So, basically thats almost everything. Whenever its plugged into USB though, it works like a charm (for the most part).
Would a problem with my Battery be the case? Which, would be awkward but a possibility.
Or did I just do something wrong?
I made sure to factory wipe the phone twice, even 3 times on the last go, I updated the ENG.SPL and Radio every time I tried to reflash just to make sure.
I partitioned my SD Card for 32MB Swap; 512EXT2 (and 7xxEXT2 I forget what it was) and I also upgraded it to EXT3, which showed some improvement... I believe.
So, I just would like to have my phone working, in a peaceful, obedient manner xD.
Forgive me for the block of text, and all help will be appreciated. Thank you guys... I await sound advice

Try different ROM? See which one works best.
Like me, I found that SuperAosp is best suit for me (see my sig for DEV Site and Download, if you want to try it). It had been running fast and I had no issue, what so ever. Occasionally when I loaded apps that hogged the power usage it gets lags, but still good. FCs are at minimal to none (that's just because of the way I handle the apps). Once in a while I noticed that it reboot, when I tried to use the apps that hogged the memory (maybe that was the apps issue).
Only other thing I recommed is to download a different launcher, because the build-in ADW Launcher does not work too well in my opinion.
Another thing, if you wish to keep the ROM you had. I would suggest to change the partition size. (IE: Catch [128MB]/Ext 2 or EXT 3 [1024MB]/ FAT32[the rest]) Now I know other people might say that it's overkill, but to me my G1 performance it great.

I've tried multiple roms as of late, and the one I like the most does happen to be MLIGNs... everything seems to be working correctly for the most part with the exception of what I listed above... Now on the like, 23rd reboot most of the sluggishness that was there before is gone, and everything is pretty much being cooperative, with the exception of like the weather, which isn't updating properly but I can live with that. What I cant live with is the fact that this ROM when not plugged in, will freeze up when in the lock screen, a few minutes after it has darkened and gone black and wont respond at all. Or I'll unplug it and just do a test, swipe left, right for a good minute or two, go into apps and It'll just SHUT OFF. Maybe it really is the battery? I'm unsure. When I look at the battery it does look quiet bloated... I am unsure...
I'm gonna try to set it to what you recommended, and see if that works...

I don't think it's the battery.
Have you tried reformat/partion your SD card (be sure to backup your data first). See my last comment on sizes recommendation for each partition.
Also check on the swappiness setting.

Mhm... so I went back and followed everything you told me to do, including repartitioning to the exact file sizes you told me. (Also I'm guessing Cache meant Swap) So I set everything up and its really blazing fast and stable.... until I remove the USB cord. Then it shuts off, freezes at lock screen when the screen is dimmed to black, and will just randomly shut off while doing things (especially when trying to get into messages)
Also if it helps, I have a Class 2 8Gig SD card, and my Recovery is Ra 1.5.x(I forget.) I'm completely confused... I dunno what to do... I would really like this to just work and stop being a hassle D:

Hmmm, Try reading this thread, http://forum.xda-developers.com/showthread.php?t=1010932
See if it helps.

Nothing :/ Its okay... I'm gonna go play around with other roms, completely re do my phone, make sure everything is updated etc. Then go from there.
Thank you anyways, you were a big help, reguardless of my phones triumphing retardism

[Q] Phone freezes randomly / needs hard reboot - 2.3.3 and 2.3.4 custom ROM's

Hi all
Ever since upgrading to 2.3.3 I've been having random freezes that usually end up in needing a battery pull or pressing down on the power button until the phone reboots itself. This is with Darky's 10.1, although I don't think it's related to the "Darky parts" of the ROM itself, but something more to do with the OS.
Also, I've felt that the phone sometimes slows down. It doesn't feel like the original lag on 2.1, but rather feels like something's eating up CPU power. This will happen on ANY application, and even when moving through homescreens on TW Launcher or ADW Launcher.
Another thing of note is that it seems to be the UI or input process that hangs or dies or something. Because whatever's running keeps running I just can't make the phone respond to touch or any of the hard buttons. For example, today I was playing Age of Wind (sweet game, check it out) and after like 10 seconds of the game stuttering, the phone stopped responding, but my ship just kept going forward and the other ships were trying to keep up with me. Sounds and music kept going. And after 30 seconds of "inactivity", the screen went to sleep. As you can see everything's normal except there's no input.
So what I'd like is for ideas on how to fix or figure out what's wrong. I'm somewhat tech-savvy so I wouldn't be scared of using adb or some other debugging tool. So far I've not been able to figure out what's wrong because all the logs start over whenever I reboot the phone.
So, any ideas? Any additional information that would be useful?
Edit and update: I've changed the title because this has already happened on different custom ROM's, including Darky and Criskelo.
I have now tested for 5 days on Criskelo's ROM (based on 2.3.4) and it will happen also. So far what I've noticed both on Darky's and on Criskelo's ROMs:
- The phone will work perfectly for about 4-5 days
- On the 4th day it will start stuttering and lagging. That's when I know it's very close to locking up.
- On the 4th day it will maybe lock up once in a day
- After the 4th day it will start locking up up to three times a day
- The lock-up is at the UI level. Applications will keep running, it will ring if you call it, notification sounds are still alive, the screen will turn off normally after 30 seconds or whatever timeout you set up. But input is totally dead.
- When it locks up, both soft-buttons will light up and stay lit.
Possible causes:
- Something related to USB storage or SD card storage. Someone mentioned that it might be caused by the "fast media scanner". It's possible, because on one of my many tests, instead of reinstalling an OS, I formatted the minisd, the internal sd and phone storage and the phone was fine for 4-5 days and then it started doing screwy stuff again. This reinforces the theory that it's something to do with storage. My guess is the OS itself starts degrading the filesystem or handles or something. And my suspicion is that it's something in the /system/dbdata or /cache partitions, not the sdcard or external sd cards. Impossible to know because I have no idea how to debug using adb and nobody has given any ideas on this.
- I'm starting to suspect the BLN support in the kernel. I have BLN turned off, but I'm not so sure.

Hi,
Sorry don't have any answers, but am having the exact same problems on Darky's 10.1. Except I have a TouchWiz4 Port + Galaxy S II Icons.
Hopefully someone will know of this issue! Its starting to annoy me!!
Cheers,
Sunny

Tell me something, when you installed Darky, did you restore your apps via Titanium Backup? Did you select "Restore apps + data" or just apps?
I'm in the process of reinstalling Darky's from scratch, see if that works. If not I might go back to 9.5 or try Criskelo's ROM.
Thanks

Hi,
Nope I didn't backup or restore any apps. My data is all on my SD card and I just reinstall apps.. I came from DebusROM G1.
Thanks,
Sunny

Maybe a factory reset (do it in recovery) would help?

I actually did a factory reset before installing.
@sundazetoo: Do you have Voodoo lagfix enabled?
Last night, while in the process of reinstalling Darky's ROM, I disabled the lagfix (converting to RSF) and after almost an hour i decided to pull the battery. Then when I rebooted again, it went through the conversion process, finished in 2 minutes (wut!) and an error displayed (it couldn't mount some partition, one that I know is not critical).
So I'm suspecting a filesystem problem.
I already installed and DO NOT have Voodoo's lagfix enabled. I also did a complete wipe and restored my apps without data. So far it seems fine but it's only been a few hours.

@Lunchbox115: I did the factory reset when I installed too.
@ferparedes: Yep voodoo is enabled. I am now running on the stock launcher that came with Darky's 10.1 and it seems to be running a lot smoother. I was running a TW4 port so that may have been my problem!
I will monitor it and let you know how it goes.
Have you tried clearing the data / cache for the launchers you are using? That seems to fix alot of FC issues for apps for me.. I guess no harm in trying anyways?

2 days in after reinstalling.
Voodoo EXT4 lagfix NOT enabled. Phone is pretty snappy and I've haven't had any more freezes. I think it was either a bad EXT4 conversion or the lagfix itself was causing it. Anyways, since the phone is pretty fast I'm leaving it with RFS lagfix only.
One thing of note, though. I'm running stock GB launcher atm, because ADW was giving some problems.
Yesterday ADW Launcher *died* and although the phone was working and responsive, the launcher never came back. The result was that when I pressed the home button nothing happened but a blank screen. The power button worked, though, so I was able to do a clean reboot and switch to Launcher.

Interesting, I dont seem to have the same issues with the voodoo lag fix.
Also I am now using ADW Launcher EX and have not had any issues. I think my problem was the TW4 port.

Same again
I get these issues too. I seem to get them RFS and ext4 (I think - mostly its been ext4 though). Often get a delay on the keyboard. Its driving me a bit nuts but I am reluctant to go back to Froyo just for this (I hate having to restore all my user names and passwords).
Silly thing is I cannot recall if I got in when I tried Gingerreal (on Darky 10.1 now).
Would love to see thoughts and theories too..
G

UPDATE
After almost 2 days of totally flawless operation, I reinserted my 16 GB Micro SD card with all of my stuff in there. Among many things:
- Audible audiobooks, along with bookmark and "furthest listened" data
- Music, playlists. All created by TuneSync (which I use to wireless sync music and playlists from my PC's iTunes)
- Dropbox download folder
- Photos and videos taken with the phone
- Some other files not associated with any app
2 hours after doing this, blam, the phone locked up again requiring a reboot. So I removed the Micro SD and when I got home I backed up my photos and videos on the PC, reinserted it in the phone and formated the card. This was last night.
So far the phone's working fine.
My current theory:
The Micro SD card I originally bought for the phone was an 8gig. When I got the 16 gig one, I just copied everything from the 8gig onto a folder on the PC, then copied everything over to the 16 one. This might've broken something.
After going to Gingerbread, it's possible that the way some applications look for their data (for example, Audible) changed but when encountering the same data (that was copied over from a windows folder on the PC) it might've generated errors which in turn put the interface into a deadlock.
My strongest suspect is Audible. After installing Darky 10.1, the app just chugged away remembering all my farthest listened to data, all my audiobooks were visible, etc. After reinstalling (and removing the Micro SD) I had to redownload some, but it still remembered where I was and didn't have to reactivate the device. Now, after formatting the Micro SD, I've had to redownload everything, it didn't remember where I was on each audiobook and I also had to reactivate the device.
If the phone doesn't lock up during the next 4-5 days then I'll conclude that errors on accessing the Micro SD by some app was the cause.

sundazetoo said:
Interesting, I dont seem to have the same issues with the voodoo lag fix.
Also I am now using ADW Launcher EX and have not had any issues. I think my problem was the TW4 port.
Click to expand...
Click to collapse
Yeah I actually don't think ADW launcher is causing this particular problem. But in a different problem altogether, it did die and in this case required me to do a reboot, albeit a clean one. But if it gave me this one single problem than I'm inclined to stop using it. I don't want the phone disabled for the 3-5 minutes it takes to boot up if I need it in an emergency (it's a phone first and foremost, after all)

tw4 is an EVIL for SGSi9000 imho... because almost everyone have problems with it !!! so just use another Launchers... LauncherPro, Launcher EX (my favourite) but not TW4 )))

I tried to fix with a reinstall of stock jvp and then went to F1 v8 jvp rkm but I also formated ext_sd card as suggested here (and deleted audible application which I was not using.
So far so good but it's only been an hour...
Sent from my GT-I9000 using XDA Premium App

Definitely something related to sd card. Everything is screwy now but less so with the sd card out.
Anyone find any solutions?
I was getting double boot screens and freezes on the dialer. Realized it was the sd when my backup would not load.
Sent from my GT-I9000 using XDA Premium App

Had this happen to me today,
I had the phone boot up and it would get to the lockscreen, then media scan, then it would lock up, only a battery pull would turn it off.
Tried booting without the External SD and it didnt occur, hmmm
Put the microSD card in the card reader on the PC, and performed a scan for errors/fix bad sectors, it didnt find anything but i put it back in and it goes fine now, im sure its the external card.

related info
Found this thread that seems related;
http://forum.xda-developers.com/showthread.php?t=367912&page=3
Trying the chkdisk utility now...

It did it again with the micro sd card out. So today I reformated the internal SD storage (usb storage) and will see how it goes. If this last attempt fails I will either go back to froyo or try another ROM.
But I do think it has something to do with one of the SD card storage.

gfacer said:
Found this thread that seems related;
http://forum.xda-developers.com/showthread.php?t=367912&page=3
Trying the chkdisk utility now...
Click to expand...
Click to collapse
Should be fine

More things to try
Looked at my rom page (F1 JVP) and noticed that V8, which I have now, had the faster media scanner as does Darky's 10.1-which is not getting updates often now it seems. Well the faster media scanner only lasted 2 days until V9 of the F1 rom when the delevoper removed it. My guess it that it was causing issues.
Leads me to wonder if that might be causing the corruption in the first place or at least a contributing factor.
Also read some threads at google about similar issues across a whole wave of devices and one person there mentioned H2testw utility to test the sectors of your SD card. It sounds like cheap ebay sd card and larger SD cards my have more issues (mine is a 32gb). It is best to format and then test with h2testw but I decided to run just on the empty parts of the card and decide from there.
G