[Q] Issue with device freeze/shutdown - LG Optimus L9 P760, P765, P768, P769

After having rooted my P769 20d phone I have experienced random crashes/shutdowns of the phone. Often times it will just be sitting in my pocket and I will look to check my messages and the phone will be off/unresponsive. I use the term crashing because a simple power button press will not turn it back on, it requires a battery pull to do that.
Is there any known problem here? It is fairly irritating to me that there's no crash logs that persist post reboot so how can we troubleshoot?

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[Q] Galaxy S3 lockscreen hang and also unresponsive blackscreen

Hey guys,
I know there has been a couple of posts like this that I have found through searching but none have actually found a solution, so instead of resurrecting a old thread I thought I would start a new one.
Basically I am having some issues with my new pebble blue (yey) S3 . I have found that sometimes when the phone is sleeping when I press the power button to bring it out of sleep the lock screen begins to hang. This is followed by a number of different things, the screen either glitches for a bit and then begins to work or it stays locked and needs a battery pull. As well as this I've found that randomly either when charging or not and the phone is sleeping it simply becomes unresponsive, staying on a black screen and needing a battery pull to fix (this has only occured a few times, the hanging lock screen occurs quite often).
I have done some searching and found little in the way of a solution or what the problem is, however I have found that when the lock screen hangs -if it begins to work again after glitching out the 'WIFI connected to ****' appears at the bottom of the screen. Anyway if anyone has any ideas or also recieves this problem I would really appreciate some help as it's driving me crazy and I'm unsure if it is a common S3 bug or a faulty handset, in which case I have limited time to RMA.
Cheers in advance
Hmm, sounds like a faulty phone to me. Try taking it back to get it exchanged for onother one. S3 was built to fly not crawl.
You'll want to go through a process of elimination to figure out when might be causing it.
Something you can try and test with (one at a time)
-turn on airplane mode
-turn off live wallpaper
-shut down all running tasks
-change your lock screen security method
-limit the number of widgets running on all the screens
-reduce the number of active screens
Probably other things you can try to pull out of the equation, but thats a good start
After looking up dial-a-phones returns policy it would seem that I have 28 days to return if the handset is faulty, so this atleast gives me some breathing room to try out any suggestions for fixes. I will begin to eliminate each of the suggested items above however as the lock screen problem is intermittent it make take a day so actually see if it has had an effect, which is annoying at the least.
On another note a numberupted of people are stating high battery life on their devices however mine doesn't seem to be as good and I do have power saving on as well as nfc etc. turned off. This makes me believe my handset could have a fault, but tbf I haven't allowed for a discharge to 5% and the recharging to 100% which I heare allows for optimisation of the battery.
EDIT**** I have changed the lock screen previously and found it had no effect on the problem and I do not have a live wallpaper in use.
Phone Freezing after reboot and auto wifi signal found on.
Same here, been happening the last few days after I installed Avast. Also, turning off and on the auto on wifi seemed to replicate the problem.
The phone will boot to the lock screen and freeze a bit, and sometimes the news ticker freezes, and then after unlocked, I try to turn off wifi signal has been found on the notification dropdown and then tries to auto connect to wifi, the phone will freeze up if I dont turn it off in time.
Once the auto wifi connect is off and reboots, then the phone will keep glitching up until it catches up processing alot of processes it was trying to do for about 1/2 hr. Also, if phone freezes up for too long, like after trying too many time of unlocking the screen while freezing up, the phone gets stuck at the lock screen and the phone almost overheated, in an area right below the battery. I had to pull the battery out to cool it off.
It seems to be a glitch in the auto wifi, especially if alot of resources are being used. Once Avast was on my phone about 1.5GB RAM is being used sometimes and since has really slowed the phone down. Going uninstall alot of apps.
JCrinage said:
Hey guys,
I know there has been a couple of posts like this that I have found through searching but none have actually found a solution, so instead of resurrecting a old thread I thought I would start a new one.
Basically I am having some issues with my new pebble blue (yey) S3 . I have found that sometimes when the phone is sleeping when I press the power button to bring it out of sleep the lock screen begins to hang. This is followed by a number of different things, the screen either glitches for a bit and then begins to work or it stays locked and needs a battery pull. As well as this I've found that randomly either when charging or not and the phone is sleeping it simply becomes unresponsive, staying on a black screen and needing a battery pull to fix (this has only occured a few times, the hanging lock screen occurs quite often).
I have done some searching and found little in the way of a solution or what the problem is, however I have found that when the lock screen hangs -if it begins to work again after glitching out the 'WIFI connected to ****' appears at the bottom of the screen. Anyway if anyone has any ideas or also recieves this problem I would really appreciate some help as it's driving me crazy and I'm unsure if it is a common S3 bug or a faulty handset, in which case I have limited time to RMA.
Cheers in advance
Click to expand...
Click to collapse
Same problem.
No problem if Wifi is switched off prior to sleep.
No problem if Wifi connection is still available.
Problem to lockscreen if Wifi connection is broken (move away from connected router).
Any suggestion?
sassorock said:
Same problem.
No problem if Wifi is switched off prior to sleep.
No problem if Wifi connection is still available.
Problem to lockscreen if Wifi connection is broken (move away from connected router).
Any suggestion?
Click to expand...
Click to collapse
Exactly the same here. Driving me crazy. I did root the phone using the Samsung Galaxy S3 Toolkit. I don't know if the problem also exists on non rooted devices.
S3 black screen after unlocking
Has there anyone experience S3's screen went on black? I have pebble blue S3 - GT-I9300. Cases when unlocking, answering an incoming call or attempting to turn off an
alarm? Mine happens when after unlocking the screen then it goes black and screen becomes unresponsive. It happens intermittently and even after 3 times of
reprogramming. I am now going to have it replaced. I am having a lot of troubles -- it exits on its own when im reading or composing an SMS; files were deleted after
restarting the unit, and an app opens up even not touching the scree. This is expensive and I am paying a lot just to experience this king of inconvenience.
DavidNieuwpoort said:
Exactly the same here. Driving me crazy. I did root the phone using the Samsung Galaxy S3 Toolkit. I don't know if the problem also exists on non rooted devices.
Click to expand...
Click to collapse
I also rooted my S3 a few days ago (with the S3 toolkit), and have had lots of problems with unresponsive lockscreens (I use PIN, because of exchange connection). It takes a few seconds or maybe up to as long a minute before I'm able to punch in the PIN-numbers. Before this the screen lights up but does not respond to input.
But the WiFi-connection issue might be what is the triggering factor, because after a boot it wotks just fine for several hours, if I'm not moving out of my current WiFi zone. First I thought it was either Secure Settings or Tasker that made my device lock up in this matter, but now as they are both uninstalled, the problem still occurs.
Are you running some kind of custom rom, or just the latest stock ROM, but rooted?
Flodas said:
I also rooted my S3 a few days ago (with the S3 toolkit), and have had lots of problems with unresponsive lockscreens (I use PIN, because of exchange connection). It takes a few seconds or maybe up to as long a minute before I'm able to punch in the PIN-numbers. Before this the screen lights up but does not respond to input.
But the WiFi-connection issue might be what is the triggering factor, because after a boot it wotks just fine for several hours, if I'm not moving out of my current WiFi zone. First I thought it was either Secure Settings or Tasker that made my device lock up in this matter, but now as they are both uninstalled, the problem still occurs.
Are you running some kind of custom rom, or just the latest stock ROM, but rooted?
Click to expand...
Click to collapse
Just the latest stock ROM but rooted. I've found out that turning off the wifi power safe mode fixes the problem for me. To do this:
- In the dailer enter *#0011#
- Press the menu key
- Select wifi
- Press the on/off button.
The wifi power safe mode will however be turned on during boot. So rebooting will set it back on.
*#0011# seems does the trick. But is annoying had to do this every time after power off (change battery, change Sim, flying).... Anyway to keep the setting?
I am also on stock Rom and rooted. Interested to know any non-rooted phone got this problem?
BTW. I found a quick (at least quicker than pull the battery) way to get out of the forzen lock screen (sometimes forgot to do the 0011 trick): press the power button (screen will Dim instead of OFF), then hold the home button for few seconds, as soon as you see the "menu" and "back" button lit up, the lock is un-freeze...
A permanent solution is appreciated for such an advance phone....
sassorock said:
*#0011# seems does the trick. But is annoying had to do this every time after power off (change battery, change Sim, flying).... Anyway to keep the setting?
Click to expand...
Click to collapse
Not that I know of.
Problem solved. For me anyway. Hope works for all of you having the same trouble.
My trouble begin with recent upgrade to LH3. My S3 was rooted by S3 toolkit v2.0. CWM installed was v4 something.
I un-rooted the phone. Uninstalled S3 toolkit v2.0. Re-installed the S3 Toolkit v5.0. Rooted the phone again (CWM become v6....).
I do not know it was CWM version caused the trouble or not. But my S3 is ok now.
I got it on my non-rooted phone, any additional solutions/suggestions? or service?
I found solution for problem . And my phone is working well. I downloaded rom file android 4.1.2 and flash my phone
JB 4.1.1 caused these WiFi issues on my phone
Jodatnia said:
I found solution for problem . And my phone is working well. I downloaded rom file android 4.1.2 and flash my phone
Click to expand...
Click to collapse
Exact opposite for me...never had the problem then since loading stock JB 4.1.1 with root I get lockups or freezes whenever WiFi is turned off or I leave my router's range. As soon as I disconnect from WiFi the whole phone freezes.
The *#0010# also locks up the phone when I turn off the WiFi power saving feature.
None of this happened before JB...and I replaced my phone with week via warranty due to this and the new phone does the exact same thing as soon as I upgraded to JB with root.
Any ideas?
Black screen / random reboot solution
Hi All,
I've had the black screen / random reboot issue for a few days. The only way to restore functionality on black screen lockup was to remove the battery.
I tried changing to Chrome browser and stopping the stock browser as suggested in some threads but it kept crashing.
I searched everywhere and most threads suggest a dodgy motherboard.
For me the issue was related to either a single PDF download via the stock browser or the fact I had quite alot of saved PDF files on my phone (S3 Stock firmware I9300XXELLA)
After deleting all the files listed in Internet downloads (look for Downloads with a green arrow Icon in apps) my trusty S3 has returned to normal. No black screen lockups, no hanging, runs like a dream!
I appreciate this may not solve everyones black sceeen issues but I haven't found any other thread with this solution. Hope it works for you.
Thanks,
Giz.
giz_zard said:
Hi All,
I've had the black screen / random reboot issue for a few days. The only way to restore functionality on black screen lockup was to remove the battery.
I tried changing to Chrome browser and stopping the stock browser as suggested in some threads but it kept crashing.
I searched everywhere and most threads suggest a dodgy motherboard.
For me the issue was related to either a single PDF download via the stock browser or the fact I had quite alot of saved PDF files on my phone (S3 Stock firmware I9300XXELLA)
After deleting all the files listed in Internet downloads (look for Downloads with a green arrow Icon in apps) my trusty S3 has returned to normal. No black screen lockups, no hanging, runs like a dream!
I appreciate this may not solve everyones black sceeen issues but I haven't found any other thread with this solution. Hope it works for you.
Thanks,
Giz.
Click to expand...
Click to collapse
Thanks for the tip...
Was this happening on JB for you? You mention stock firmware (not familiar with I9300)...so I am guessing it was ICS.
For me the issues are with JB and I had no files at all in the Downloads folder after a certain point when I wiped / formatted the SDCard...so I do not think my lockups were related to PDFs. But I did (and still do) have a ton of music and a lot of movies on the External MicroSD Card....and quite a few custom notification and ringtone MP3s on the Internal SDCard. Next time I load JB I will run it a few days with none of this media loaded....
Jodatnia said:
I found solution for problem . And my phone is working well. I downloaded rom file android 4.1.2 and flash my phone
Click to expand...
Click to collapse
For me this also worked. Resolved everything. (on i9300 int)
Boomer6345 said:
Thanks for the tip...
Was this happening on JB for you? You mention stock firmware (not familiar with I9300)...so I am guessing it was ICS.
For me the issues are with JB and I had no files at all in the Downloads folder after a certain point when I wiped / formatted the SDCard...so I do not think my lockups were related to PDFs. But I did (and still do) have a ton of music and a lot of movies on the External MicroSD Card....and quite a few custom notification and ringtone MP3s on the Internal SDCard. Next time I load JB I will run it a few days with none of this media loaded....
Click to expand...
Click to collapse
This is on JB 4.1.2, Phone had been updated to 4.1.2 for about a month. The issues started after a pdf download. Once all pdf's were deleted the handset works perfectly.
Giz

[Q] Blocked incoming call screen

Straight to the problem: sometimes (and in a very unpredictable manner), when i have an incoming call, plenty of problems show their ugly face. First of all, i sometimes can't accept, or decline an incoming call, because the screen isn't responding to input. Sometimes i can go around this by pressing the on/off button twice, and that would enable the screen. But, sometimes even that doesn't work. The phone just keeps ringing until the caller eventually gives up. When that happens, the phone continues to function normally.
Another problem is constant vibrations i noticed in several occasions. Instead of vibrating in "pulses" or "waves", the phone just keeps vibrating constantly, which can be very annoying in combination with the problem mentioned in the first paragraph.
At first i though it's a bug in my ROM (CM9 port for legend), but have heard people experiencing the problem on other stock devices (Galaxy SII on stock ICS, for example). So it is not that rare, but to this day i haven't been able to find a solution.
Did anyone manage to solve this problem, or find any information as to how this can be avoided?
stane37 said:
Straight to the problem: sometimes (and in a very unpredictable manner), when i have an incoming call, plenty of problems show their ugly face. First of all, i sometimes can't accept, or decline an incoming call, because the screen isn't responding to input. Sometimes i can go around this by pressing the on/off button twice, and that would enable the screen. But, sometimes even that doesn't work. The phone just keeps ringing until the caller eventually gives up. When that happens, the phone continues to function normally.
Another problem is constant vibrations i noticed in several occasions. Instead of vibrating in "pulses" or "waves", the phone just keeps vibrating constantly, which can be very annoying in combination with the problem mentioned in the first paragraph.
At first i though it's a bug in my ROM (CM9 port for legend), but have heard people experiencing the problem on other stock devices (Galaxy SII on stock ICS, for example). So it is not that rare, but to this day i haven't been able to find a solution.
Did anyone manage to solve this problem, or find any information as to how this can be avoided?
Click to expand...
Click to collapse
I have the same problem with my phone. Any solution for this problem thx
Reflash, reflash, and if it happens again - reflash. The screen lock/unlock workaround was working about 90% of the time. I gave the phone to my father (clean new flash) and he didn't experience any issues with the rom so far.

[Q] Strange problem with my P7510

My P7510 started to do a strange thing.
I usually never turn off the device and I just let it in sleep mode with everything off to save battery (wifi, bluetooth, ...)
Lately I noticed that sometimes the screen turns on and off by itself every few minutes.
No physical harm has ever been done to the tab and the power button doesn't seem to be sticky, so I think it may be some kind of malware.
I'm just asking what do you guys think could cause this before going with the trouble of doing a factory reset.
btw i'm on rooted stock ics rom.
thanks
Have you installed any sort of app that has permissions to wake the device or turn on/keep the screen on when running? Try uninstalling a couple of recent apps to see if one of them is the culprit.

[Q] Phone Shuts down automatically

Got my Zu a few weeks back. When in stock, this problem occurred randomly and extremely infrequently. Now, the phone is unlocked and rooted and currently in 757 (4.4.2). Now the frequency of the problem has increased many fold. Whats the problem? ... The device just switches off without any notification or alert!! Even when fully charged. I need to switch it back on (with the power button) when I realize it has switched off.
This switch off randomly happens at-least 3-4 times a day. I used the "catlog" app to see if any errors or failures are logged (which may cause the shutdown), but the log entries are so many and so many are generated that they just fly past for me to figure out anything. Is there any specific error that I may have to search for? Any ideas on how to approach the problem and maybe solve it? If it turns out to be a h/w issue, I can send it for service. But I need to ensure that it’s a h/w issue Any help will be greatly appreciated. Thanks!

[Q] Broke Wifi and fails to power off

Hi, I have a 2 week old handset which has now twice displayed a pretty strange/annoying bug.
I have been using no Stamina settings other than location based WiFi and queue background data for the most part to gauge battery life under my normal work schedule but I noticed last week that my saved WiFi at home wasn't on, so instinctively I tried to click the WiFi symbol but to no avail.
I then tried to restart the phone, but when pressing the power off option, it simply booted me back on to the screen I was on before hand. This continually happened until I got pee'd off and repaired it.
Again today I ran into the exact same problem. No WiFi and I could not power off. After several attempts at powering off I managed to get it to boot into safe mode where I started uninstalling apps to rule out any rogue apps. I still couldn't reboot forcing me to repair and wipe the phone.
I keep telling myself that this is merely a software bug and I can't seem to find other posts where people are suffering similar problems.
So I futilely ask, has anyone ever had anything similar happen to theirs?.
Yeah I think this is a software bug too, a similar thing has happened to me a couple of times with the wifi becoming "stuck" and rebooting the phone fixed it but if you're having trouble shutting down your phone, have you got quickboot enabled? Regardless of that though, you do have two options to force a restart, either hold volume up and power, this will force shutdown or press the small red button next to the sim card tray.
TheOnlyIntruder said:
Yeah I think this is a software bug too, a similar thing has happened to me a couple of times with the wifi becoming "stuck" and rebooting the phone fixed it but if you're having trouble shutting down your phone, have you got quickboot enabled? Regardless of that though, you do have two options to force a restart, either hold volume up and power, this will force shutdown or press the small red button next to the sim card tray.
Click to expand...
Click to collapse
I am pretty sure it is the quick boot option now. Stupid bug.
Phew...don't have to return it now.
I think sony have disabled the quick boot functionality for some reason, I ticked it thinking it might be almost like a reboot instead of power off & then power on, later I noticed the power off menu wasn't doing anything when tapping it, was almost about to do a reset but then remembered I ticked the quick boot option.
Hope they enable it in future updates.

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