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Help Phone Shutting off randomly?

I was able to get an exchange after all. Luckily, I was wrong about that. I'll get the replacement phone on Monday. I hope that resolves the issue.
Recently, the phone has only shut down once or twice since yesterday morning. At least, something I've done in the past two days has minimized the problem.
 
Mine just started doing this too. I've rooted, unleashed the beast, and did the lag fix. Naturally I'm past my 30 days. I guess this coupled with my volume up button getting lame will force me to do a warranty exchange.
 
Just FYI this happen to me about a week and a half ago, in the middle of the day, phone was on wifi at the time. I didnt check the debug or system logs but doing that would have been a really good idea if anyone wants to do that. It could be a force close in a system thread that causes it to reboot. (my logs from last week are probably long gone by now or I would check myself)

You can dial *#9900# to copy out your system kernel and debug logs to the sd card.
 
I had never experienced this problem. I saw on the AT&T forums that someone found that if they UNchecked power saving mode, it does not randomly shut off. This is probably why I never experienced the problem (I had always had it unchecked since the day I got it).
 
I had never experienced this problem. I saw on the AT&T forums that someone found that if they UNchecked power saving mode, it does not randomly shut off. This is probably why I never experienced the problem (I had always had it unchecked since the day I got it).

One of my 3 suggestions (5 posts ago).
 
I have tried all of the above and do not have my phone rooted and purchased it on 8/16 (manufacture date 7/13) and my phone still shuts off whenever it feels like it however many times it feels like a day (it varies) and without exchanging it...is it worth it to exchange it for a new one and if so am I stuck with the phone if the said exchange phone does the same shutoff randomness or can I exchange it again for a different phone other than the Captivate?
I would rather downgrade and go back to my Blackberry and just wait to change carriers instead of being stuck with one of AT&T's top-rated, highend phones that shuts off all the time for another 2 yrs...booooo....Samsung needs to fix this ASAP...cuz I like this phone otherwise!
 
I am experiencing the exact same issue. After about 3 weeks of ownership, phone shuts off randomly, sometimes 2 or 3 times within a span of 30 minutes. Did a factory reset and there was no change in behavior; applying Jack45's 3 suggestions and seeing how it goes before I take it in to ATT during my lunch hour today. I have never rooted this phone. I'll give you an update if there is any good news.

*EDIT* My old Nokia 7610 would remember the alarms I set and turn itself on if it was off in order to wake me. Now I have a fancy smartphone that can't even do that. I AM DISAPPOINT. ;)
 
I am experiencing the exact same issue. After about 3 weeks of ownership, phone shuts off randomly, sometimes 2 or 3 times within a span of 30 minutes. Did a factory reset and there was no change in behavior; applying Jack45's 3 suggestions and seeing how it goes before I take it in to ATT during my lunch hour today. I have never rooted this phone. I'll give you an update if there is any good news.

It's been two weeks and three days since I exchanged my last Captivate for the current one. Still no random shutdowns. That said, my heart still skips a beat when I wake the phone up hoping that I see a home screen and not an AT&T World Phone screen.

One of two things is happening. Either my suggestions above are making sense, or it's a hardware "luck of the draw" issue. This third phone is well-behaved...so far. I'm still convinced after much homework that it's not a Market app issue. If any of you are still trying to find a Market app that's the silver bullet, forget it. You're playing with yourself (but at least you don't have to look your best!) :D.

I really feel for readers who are having random shutdowns as it is not universal and, IMHO, is absolutely not acceptable. If you're one of the unfortunate owners suffering from the shutdowns and want my suggestion...don't settle. Exchange it if it's within the 30 days. If beyond that, see if Froyo addresses it (assuming it's not a RAM or other hardware-specific issue). If Froyo doesn't make a difference, exchange it under warranty.
 
Quick question. Has anyone confirmed it's "Powered Off" rather than locked up? I've had mine either hang for a long period of time, or possibly what I suspect is shutting down (which actually could just be it hanging or possibly running out of memory).
 
Quick question. Has anyone confirmed it's "Powered Off" rather than locked up? I've had mine either hang for a long period of time, or possibly what I suspect is shutting down (which actually could just be it hanging or possibly running out of memory).

Seeing the bright "AT&T World Phone" screen in my instances indicated to me it wasn't a hang, but rather I was turning the phone on from an off position. There was no delay.
 
Quick question. Has anyone confirmed it's "Powered Off" rather than locked up? I've had mine either hang for a long period of time, or possibly what I suspect is shutting down (which actually could just be it hanging or possibly running out of memory).

Mine has done it a few times (~3 times or so, never even in the same week) over the 35-40 days I've owned it, so pretty infrequently. Should I have gotten it replaced? Who knows, but it works so well otherwise I didn't want to trade off for another problem :D

Anyway, I'm with you on this (which was also discussed in that link). The typical version of this seems to be: the phone goes into sleep, goes "dark" and requires a re-start, but it seems like it's "hung", i.e., mine required pulling out the battery so obviously it's going to be starting up from that point, but I'm not sure it was ever actually shut down[?]
 
This may be a little more technical for just the general section, but here is what I found. I used logcat to look at the event log for the phone and found that the power management was shutting down the phone completely. I also used cat to dump the kmsg file from the kernel messages and verified that it was indeed looking for a WakeLock and not finding one. It looks like the Android 2.1 update 1 kernel is a little more thorough in power management than it needs to be. Since this is also happening to the Vibrant, Droid, and the Nexus it is definitely not a hardware issue.

As I don't have the kernel code yet for this phone I can't make the modifications there and attempt to apply a more permanent fix, however there is a work around.

1. Search in the market for Load Monitor Version 1.4.2 (Khad Mobile App) and install it
2. Run it and hit the menu button => preferences
3. Check the following:
- Add Notification
- Only notify high load
- Auto start
- Wake lock (the important one)
- Also you can change the update interval to 5 minutes to make it less frequent

Hopefully this will relieve some of the issues until the Froyo release, in the hopes that the next revision will handle power management a little better.

Following this to a T has so far worked well for me. No shut offs since RaistM75's post on this. Thank you!
 
I want to start this off with a quick thanks to those of you who repeatedly give updates to this thread. This captivate is my first smartphone and this has been a very aggravating issue that I'm just starting to tackle. I bought my phone on vacation in Ohio (8/20), and the closest AT&T store here in AZ is about an hour away so I would like to minimize the number of trips I have to make there.

It has been 10 days. This auto-off problem seems to be progressive to me. No incidents for the first few days, one or two over most of the next week, and in the last 48 hours it has shut off over 15 times with a concentration up to 5 times in one hour after I got off work today.

It has shut off shortly after disconnecting charger almost every time it gets plugged in. I have not had it power down with a charger plugged in, and so I ignore the message to unplug it if I'm relying on an alarm. It also turns off at random many other times.

I have gone somewhat crazy on downloading apps (making up for lost time), and am clinging to the prospect that these don't have anything to do with the issue.

I have just now altered the settings as suggested by Jack45. Power saving off, wifi sleep off, and auto-sleep set to max time so as to turn the display off by my button press every time. O, and I'm crossing my fingers.

I have a couple questions about the return/exchange process for those who have gone through it one or more times. From reading the thread it seems to be a 30 day window for store exchange. Does that renew every time you do an exchange? One post suggested that and it would seem appropriate. If you miss that window, what are the other options? Has anyone exchanged their phone at a different store location than the one you purchased it from?

I'll be tuned in. Thanks Jack45 and others for keeping us posted.
 
I want to start this off with a quick thanks to those of you who repeatedly give updates to this thread. This captivate is my first smartphone and this has been a very aggravating issue that I'm just starting to tackle. I bought my phone on vacation in Ohio (8/20), and the closest AT&T store here in AZ is about an hour away so I would like to minimize the number of trips I have to make there.

It has been 10 days. This auto-off problem seems to be progressive to me. No incidents for the first few days, one or two over most of the next week, and in the last 48 hours it has shut off over 15 times with a concentration up to 5 times in one hour after I got off work today.

It has shut off shortly after disconnecting charger almost every time it gets plugged in. I have not had it power down with a charger plugged in, and so I ignore the message to unplug it if I'm relying on an alarm. It also turns off at random many other times.

I have gone somewhat crazy on downloading apps (making up for lost time), and am clinging to the prospect that these don't have anything to do with the issue.

I have just now altered the settings as suggested by Jack45. Power saving off, wifi sleep off, and auto-sleep set to max time so as to turn the display off by my button press every time. O, and I'm crossing my fingers.

I have a couple questions about the return/exchange process for those who have gone through it one or more times. From reading the thread it seems to be a 30 day window for store exchange. Does that renew every time you do an exchange? One post suggested that and it would seem appropriate. If you miss that window, what are the other options? Has anyone exchanged their phone at a different store location than the one you purchased it from?

I'll be tuned in. Thanks Jack45 and others for keeping us posted.

Welcome! Sorry about your problem, but if it continues exchange it ASAP. It's worth the drive to get a unit that is trouble-free. Plus, you can spend the time bonding with a manager or assistant manager. I hope he/she has an empathy gene and is willing to work with you should you need more time. Humble yourself but, of course, not to the point of grovelling. Only you will be able to determine what approach is most effective.

I have absolutely no idea whether my suggestions are worthy of any credit. It's very possible that I simply got a phone that doesn't have the problem (third time was the charm).

I don't believe the 30 day window auto-renews. I have been able to create the additional buffer - again, because of zeroing in on a helpful store decision-maker. Fortunately my exchanges occurred within the first 30 days so I haven't had to test the relationship.

If you miss the window I was told that AT&T warranty folks may direct you back to the store for another exchange if it's soon after the 30 days. The other alternative would be for warranty to send you another unit. The sooner the better if you have an aversion to refurbs. That said, some people believe in refurbs as they supposedly have been looked after with greater care by repair people. Who knows.

Regarding exchanging at a different store...for sure. As long as it's an AT&T corporate store. If you have more than one store in the radius of your one hour trip seek out a "friendly." Once again, not a salesperson but an assistant manager / manager.

In summary. Don't wait...exchange if my "tips" fail to work for you. And, most importantly, begin relationship-building in earnest. As silly as it may sound, dress well. Human nature dictates that clothes do make the man. Is it a game? Sure...but why not play it the best way you can?

I will say that having a unit that doesn't shut down randomly is a great feeling. Something for you to look forward to.

Keep us in the loop.
 
I wound up doing the warranty. My new phone is working 100%. The USB glitch ceases to be and the KIES now recognizes my phone.

- Sent from my android.
 
Had my first shut-off last night while sleeping (got the phone on Saturday). Luckily I still had my Blackberry alarm set for work ;)

Going to see how it goes for a week or two, hopefully it won't continue and I won't need to replace it.
 
Had my first shut-off last night while sleeping (got the phone on Saturday). Luckily I still had my Blackberry alarm set for work ;)

Going to see how it goes for a week or two, hopefully it won't continue and I won't need to replace it.

FWIW, I'm using my trusty Nokia 6650 as my alarm clock and have the Captivate turned off at night to save juice.
 
After about a week, my Captivate started shutting itself down at least once a day. First time was in my pocket so i figured i pushed some buttons. But now it shuts itself off almost every night when it is sitting on the dresser with a full charge.

It NEVER shuts itself off while I'm at work or when i am using it at least once an hour. With this many problems it can't be an app problem. Too many different people with exactly the same problem.

Could you guys who did the hard reset let us know how it is after a week? I'd hate to go through the hard reset hassle and then find out it is a problem that reoccurs after about a week, no matter what. I believe the problem WILL reoccur after a hard reset.....after the "good for about a week" time period passes (which is when most of us have experienced the problem. Hard reset seems useless to me. After all, we all got the phone after, in essence, the factory DID the hard reset....and then we all had the problem start a week or so later.
 
Okay, bought my Captivate yesterday and this morning it started the powering off with a fully charged battery. I called Samsung and told them the problem, all the guy said was take it back to the store and get another one.

Apparently, Samsung is aware of the problem and their only solution/answer was for me to exchange it for another one.

Now on a positive note (hopefully), the AT&T store I took it back said they have never heard of the problem and no one else has reported having it. I am really hoping it was just a bad batch of phones.

If it happens again with this new phone I will let you know, but I am thinking not to ever let if fully charge, it didn't occur until after it was fully charged.
 
I am thinking it has something to do with the battery. Seems that most people are saying they have a fully charged battery when it occurred. Does anyone else recall if it happened before or after fully charging the battery?
 
This morning I think my phone shut off for the first time since I got it last Friday. I took it out of my pocket right after my class and the stand by button didn't wake it up. Tried powering on normally and it didn't work. Had to hold the volume buttons. The only thing that I changed was installing Load Monitor last night.
 
Samtr87, try uninstalling the Load Monitor, then powering off, removing battery, and powering on again. See if it was the application.

Curious, did you root your phone so you could do the non-market apps? Or is Load Monitor an app from the Market?

So far, on the new exchange phone I got yesterday, I did not install any new apps, or allow the battery to be fully charged, or change setting for the 16gb SD card. And it is working perfectly.

Going to go the rest of the day and see if my powering off problem happens on the new phone.
 
An update:
It seems the quick fix from my last post has not worked. It stayed on for the rest of that night, but yesterday it actually 'offed' itself in the middle of a call to at&t support in the morning (about 10 mins after unplugging from charger). And though it stayed on for most of the rest of the day, when I got home from work it turned off almost every single time I set it down. Bummer.

Headed to flagstaff today to pick up a new one.

Also, I found out from the customer service that the 30 day exchange window is from the date of your original purchase. Same for the one year warranty. So my advice if you see this issue appearing on your brand new captivate that you loooove, go back to the store and trade it for a new one ASAP
 
Samtr87, try uninstalling the Load Monitor, then powering off, removing battery, and powering on again. See if it was the application.

Curious, did you root your phone so you could do the non-market apps? Or is Load Monitor an app from the Market?

So far, on the new exchange phone I got yesterday, I did not install any new apps, or allow the battery to be fully charged, or change setting for the 16gb SD card. And it is working perfectly.

Going to go the rest of the day and see if my powering off problem happens on the new phone.

Rooting the phone was part of the one-click lag fix. That was my main reason to root. The phone has stayed on for almost 8 hours since I unplugged it this morning and Load Monitor is still on it.
 
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