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Sometimes my phone will get very unresponsive such that any action takes many seconds to show up, and everything is very choppy. Often I see this when I wake up in the morning, but it happens often enough in general. It's so bad that I can't shut it down normally because it would take over 10 min (I've actually never waited to see exactly how long it would take). Thankfully I just found out about the three finger reset (volume up, camera, power), so I shouldn't have to pull the battery anymore, but it's still a problem.
I don't remember this happening before using custom roms. It happens with both DK28 roms I've tried - Bonsai and Viper. I believe it also occurred on the 2.1 Epic Experience, although I'm not sure. I guess I should try flashing to DK28 stock to see if that works, but it's a pain to set up everything each time. I figured I'd ask here to see if anyone else has had this problem and found a way to fix it. Also, I have a feeling this could be related to WiFi being turned on, but can't confirm yet.
My phone was stuttering yesterday.
But that was only after installing smartbench and using theonscreen keyboard.
However, since I've upgraded to dk28, the phone does take (relatively) forever to shutdown.
It'll go black but the bottom lights would still be on and then like a minute or two later it vibrates and actually cuts off
Sent from my SPH-D700 using XDA App
When my phone does this, it reminds me that I like to have SeePU installed. It's pretty useful in pointing out the apps that are hogging CPU and most likely slowing down your phone.
For me it's often Touchdown, and I kill it and things are back to normal.
I have found a few things that are useful. When I need to reboot my phone I use quick boot from the market. Works every time. In between I use fast reboot also from the market. Try them and see how they work.
Sent from my SPH-D700 using XDA App
Thanks for the app suggestions. I like the taskbar icons for SeePU. It's always been useful on my Mac (stats from iStat). Quick Boot makes things easier as well.
Next time my phone hangs, I'll see if some process is taking 100% CPU.
The phone hung again, and it seemed like something was taking 100% CPU, if the taskbar SeePU icon is to be trusted. I wasn't able to figure out what the culprit was though, because the phone pretty much stopped responding. Otherwise I would have loaded Android System Info to check.
can the epic 4g run this lag fix? if not, do we have any other ways to fix the lag?
http://forum.xda-developers.com/showthread.php?t=784691
edit: nvm
So I was able to view Android System Info while my phone was hanging, but it did now show any processes taking 100% CPU, although the total CPU usage was 100%. My guess then is that the Android 2.2 OS is buggy.
However, I did find people who said leaving USB debugging on would fix it, so I'm going to try that.
For reference:
http://forum.xda-developers.com/showthread.php?t=826507
http://androidforums.com/desire-hd-support-troubleshooting/244553-100-cpu.html#post2140890
My phone hasn't hung for a while, so apparently enabling USB debugging prevents the hang / lag / crash / 100% CPU. Weird but I'm glad it works
Now the only problem is kswapd0 eating CPU sometimes. I think this is caused by lack of memory, but I'm not sure what I can do about it.
Firstly, thanks for coming to my help. Or at least looking at this thread.
The problem :
I was trying to download the 'additional data' from this game called Gangstar Miami Vindication, and after that (i had doubts if it downloaded fully, because it was done faster than i expected, anyway...) I tried to start the game. It was hella laggy (even on a dual core 1.2gHz phone?!) so I pressed the home button and went to SetCPU to overclock it to 1.6gHz for better performance (or so I thought).
I then started the game again, and midway of loading, it freaking hanged (or freezed if you may). Home button and power button, couldn't work. So I held the power button for 8 seconds to reboot it, and it did. Whew ~ but the horror ain't over. I could unlock my phone easily, no lag at all, but once at the homescreen, it hanged (again). Couldn't scroll to other home pages, or open apps, well simply the screen was unmoving.
This time I went on to remove the battery instead of rebooting with the 8-second power button hold method, and powered it on as per normal. Seemed to be working fine this time, unlocked, and whew - I could switch homescreens. But just after 20 seconds or so, it auto-rebooted. And when it rebooted, it hanged at the homescreen after unlocking as previously.
Now I'm in a panic, cause I just got this phone weeks ago and its not cheap, we all know that. Might this be a boot loop? I'm not sure. (well, it doesn't go through continuous reboots, just once and then a hang)
I'll gladly appreciate it if someone, anyone, can provide a solution to this. I was running on litening rom 6.1 and ninphetamine 2.1.2 kernel btw.
(I was thinking of flashing a stock rom via Odin. Should I? Will it solve the problem?)
Try to set your cpu speeds at what it should be again, if you manage to keep it running long enough maybe that helps.
Thanks for the reply.
I tried flashing an older version of Litening, 5.0. Seems to be without problems but the max cpu speed I can set to in SetCPU is 528MHz. Darn... whats wrong
Ahh finally its fixed. Thanks for the advice. I went to setcpu before the phone could let me down and saw the speed set at 15khz, insane. Then pushed it up to 500mhz, and flashed to ninphetamine 2.0.5. Now its fully functional, no lag, no reboots.
Sent from my GT-I9100 using XDA App
Now I love my DZ; it is by far the most capable phone I've ever owned, but it has this nasty habit of failing me whenever I seem to need it the most.
For example, today I was stuck behind a huge accident on the highway with an exit coming up in a few feet. I thought, "hey I'll just see if I can find a detour around it from this exit." Pulled out my phone and quickly launched google maps. right then, it completely stops responding to all touch input; the trackpad and physical buttons work fine, but nothing was registering on the touchscreen or capacitive buttons. I eventually had to pull the battery to fix the issue.
It just seems that these things tend to happen whenever i need to lookup something quickly on the phone (when im just screwing around on it, it works perfectly fine) be it completely not responding to touch input, or something weird happening like getting stuck between 2 homescreens, or the notification panel gets stuck halfway down, or massive input lag (5+ seconds) to the point of it not being usable.
And everything goes back to normal after a reset; but by then, I usually don't need to lookup whatever it was anymore.
The most frustrating part is that I can't seem to figure out whats causing it. I'm running virtuous 2.0.0 without any sense 3 additions, and I generally only have 1 or 2 tasks going on on the phone at once (usually just music player + whatever I'm doing). I originally thought it was just a performance issue, so I've increased the clock up to 1.5ghz (using daemon controller) but it hasn't has of an effect.
Any ideas on what else i can try?
Sounds like simple bad karma, I suggest donating to a charity or going to church
Other than that, I'd have no idea, sorry. Seeing as its not totally regular, there'd be no good way to easily pinpoint the issue. Maybe see if the rom produces a last_kmsg?
-Nipqer
makken85 said:
Now I love my DZ; it is by far the most capable phone I've ever owned, but it has this nasty habit of failing me whenever I seem to need it the most.
For example, today I was stuck behind a huge accident on the highway with an exit coming up in a few feet. I thought, "hey I'll just see if I can find a detour around it from this exit." Pulled out my phone and quickly launched google maps. right then, it completely stops responding to all touch input; the trackpad and physical buttons work fine, but nothing was registering on the touchscreen or capacitive buttons. I eventually had to pull the battery to fix the issue.
It just seems that these things tend to happen whenever i need to lookup something quickly on the phone (when im just screwing around on it, it works perfectly fine) be it completely not responding to touch input, or something weird happening like getting stuck between 2 homescreens, or the notification panel gets stuck halfway down, or massive input lag (5+ seconds) to the point of it not being usable.
And everything goes back to normal after a reset; but by then, I usually don't need to lookup whatever it was anymore.
The most frustrating part is that I can't seem to figure out whats causing it. I'm running virtuous 2.0.0 without any sense 3 additions, and I generally only have 1 or 2 tasks going on on the phone at once (usually just music player + whatever I'm doing). I originally thought it was just a performance issue, so I've increased the clock up to 1.5ghz (using daemon controller) but it hasn't has of an effect.
Any ideas on what else i can try?
Click to expand...
Click to collapse
although people say roms are 'stable' and can recommend these ROMs as "dd" (daily drivers) you cannot say that will be completely reliable. This is because when people say a ROM is 'stable', it's only after using it for 2-3days; unfortunately, roms gather clutter and begin to slow down over time. Not a problem for many flashaholics, but a problem if you're a one-rom kinda guy (or girl). So if you're not one-night-stand rom kind of person, here are some tips:
Reset your phone regularly. Phones start acting funny when they've been on for too long
Try stock ROM with addons flashed on top of it, rather than baked in a new rom
Most reliable roms i've experienced are Stock Gingerbread or CyanogenMod. Try those
If you are flashing a new rom, use SuperWipe, this can help get rid of clutter from old roms
skulk3r said:
although people say roms are 'stable' and can recommend these ROMs as "dd" (daily drivers) you cannot say that will be completely reliable. This is because when people say a ROM is 'stable', it's only after using it for 2-3days; unfortunately, roms gather clutter and begin to slow down over time. Not a problem for many flashaholics, but a problem if you're a one-rom kinda guy (or girl). So if you're not one-night-stand rom kind of person, here are some tips:
Reset your phone regularly. Phones start acting funny when they've been on for too long
Try stock ROM with addons flashed on top of it, rather than baked in a new rom
Most reliable roms i've experienced are Stock Gingerbread or CyanogenMod. Try those
If you are flashing a new rom, use SuperWipe, this can help get rid of clutter from old roms
Click to expand...
Click to collapse
Hmm, so you believe that this is purely a rom issue?
I havent run a stock rom for a while, but from what i remember the experience wasnt that pleasant, there was significant lag almost everywhere in the ui. Although i will admit that was back with froyo; i havent tried a stock gb stock rom yet.
Ill probablygive cm7 a go. Ive just grown so used to some sense features that its going to be hard for me to give them up (mainly recent apps in notifications, news widget, t9 dailer+manually linking contacts, and remote ring and forward on htcsense.com)
Has anyone had similar issues running virtuous sense 2.0.0?
As far as recent apps goes, long pressing the home button is a standard feature of android that brings up the most recent. Stock is the last 8 (I think) cm7 can show 15.
Sent from my HTC Vision using xda premium
Higher overclocking will make your phone LESS stable, not more. I'd stick around 1 GHz, as this is known to be very stable on most Z's, and usually does not result in any significant additional battery drain. OC may not have anything to do with your random hangs, but its probably not helping either.
redpoint73 said:
Higher overclocking will make your phone LESS stable, not more. I'd stick around 1 GHz, as this is known to be very stable on most Z's, and usually does not result in any significant additional battery drain. OC may not have anything to do with your random hangs, but its probably not helping either.
Click to expand...
Click to collapse
I'd agree. I really wouldn't ever go over 1.2ghz for a daily driver personally.
I run my ROMs at 800mhz lol, so I don't see the advantage of a huge overclock unless you're just bragging about benchmark scores.
its funny when u wanna show off your phone and you take it out of your pocket acting all cool and stuff and when u press the power button it wont wake up or you get a blank screen
haha its just bad karma for u like nipqer said
Try the stock pre-rooted gingerbread...I just flashed t last week and it is way faster than my froyo was, and amazing battery life, for me anyways, I do have an extended life battery though lol. Anyways as far as speed it is snappy on 800 mhz
Sent from my T-Mobile G2 using XDA App
redpoint73 said:
Higher overclocking will make your phone LESS stable, not more. I'd stick around 1 GHz, as this is known to be very stable on most Z's, and usually does not result in any significant additional battery drain. OC may not have anything to do with your random hangs, but its probably not helping either.
Click to expand...
Click to collapse
I've noticed the random hangs / glitches @ 800Mhz and 1Ghz, so I'm hesitant to say that the OC is the cause.
What do you use for stability testing? I've been running quadrant nonstop to test new OCs, but I don't think that benchmark stresses the cpu enough.
i am running Virtuous v2.0.0 w/ kernel unity v6 on it on desire z.
i've found bugs like
1/the top black bar ui, top left corner, some times i see the background wallpaper rather than the black bar. but it goes away if i pull down the notifications.
2/ the mail with microsoft exchange active sync, if i delete the mail it will automatically resync and downloads all mail including the on i deleted. but i got around that by using pop/imac instead.
all rather minor as i got ways to go around it.
i did have a similar issue where the touch screen goes unresponsive and i had to force close it, restart phone to get it back alive. but then i readjusted the clock speed and never had it happened again.
the phone is at around 825mhz with governor smart ass on wake time max, unless im watching 720p movies on the phone then i ramp it up at 1.4ghz.
sleep time on 368mhz max with governor at conservative.
i had it on like this since 11/09/11 (as i made a rom backup) and it never occured yet.
swinderz said:
i am running Virtuous v2.0.0 w/ kernel unity v6 on it on desire z.
i've found bugs like
1/the top black bar ui, top left corner, some times i see the background wallpaper rather than the black bar. but it goes away if i pull down the notifications.
2/ the mail with microsoft exchange active sync, if i delete the mail it will automatically resync and downloads all mail including the on i deleted. but i got around that by using pop/imac instead.
all rather minor as i got ways to go around it.
i did have a similar issue where the touch screen goes unresponsive and i had to force close it, restart phone to get it back alive. but then i readjusted the clock speed and never had it happened again.
the phone is at around 825mhz with governor smart ass on wake time max, unless im watching 720p movies on the phone then i ramp it up at 1.4ghz.
sleep time on 368mhz max with governor at conservative.
i had it on like this since 11/09/11 (as i made a rom backup) and it never occured yet.
Click to expand...
Click to collapse
I've been playing with the wake min and wake gov settings the past few days. I have it set at 600Mhz min, performance gov; I haven't noticed much difference in the battery life, but I'll have to do more extensive testing to be sure.
Performance feels slightly better, especially after a fast wake. can anyone give a detailed explanation of the behavior of the different gov settings? I can't seem to find much info on it.
makken85 said:
I've been playing with the wake min and wake gov settings the past few days. I have it set at 600Mhz min, performance gov; I haven't noticed much difference in the battery life, but I'll have to do more extensive testing to be sure.
Performance feels slightly better, especially after a fast wake. can anyone give a detailed explanation of the behavior of the different gov settings? I can't seem to find much info on it.
Click to expand...
Click to collapse
http://www.droidforums.net/forum/droid-hacks/21309-setcpu-1-4-6-what-cpu-governor-options-mean.html
I've been having a recurring problem where my phone will lock up in a deep sleep, leaving the phone completely off. In order to restart the phone, I have to hold Power and Vol Down which takes me to a charging logo, and then hit power again. This generally happens overnight when the phone is charging, but I've also had it happen once while making a VoIP call. I thought I resolved the issue by wiping the phone and flashing the stock 4.2 ROM. However, the issue just occurred last night after 4 days of bug-free usage.
My question is whether this is some sort of weird software bug or a hardware issue. I haven't seen others report identical behavior but I've seen lots of complaints about freezing and random reboots that seem to be due to software. Should I request an RMA?
+ 1 . I am having the same issue. I would say hang tight. Call the support team and let them know you are having issues. If atfer a few weeks the problem persists perhaps go through an rma. I suspect it is software related. Lets say you did RMA still had the issue then had a dead pixel or other problem? It would suck and you would have to go through the whole process again. rinse and repeat. Only if you want to return the device for a full refund, then I would say hurry up and make that call. My .02 Good luck.
NexUsandThem said:
+ 1 . I am having the same issue.
Click to expand...
Click to collapse
+1
Having the same issue. Although no clear pattern is visible. Sometimes I find the phone dead-locked after putting it aside for 10 minutes and sometimes it seems to run for a day or even two without issue. Running _motley kernel right now without any change on this front.
I rather think it's a software issue than hardware. So I am not going to RMA it.
Strangely when I power off the phone on such a lock-up and then reboot it I will see a substantial drop in battery after the reboot. So the phone seems to be in some state where it still drawns more battery than in normal operation. E.g. with _motley kernel and limited clocks I typically see 3-5% battery drop over night only. When it locks up during the night and I reset it in the morning then battery usually drops much more (e.g. 30-50% is gone). Maybe it's caused by some hanging/deadlocked driver.
If you full factory reset and flashed then i'd say some app of yours is causing the issue.
shotta35 said:
If you full factory reset and flashed then i'd say some app of yours is causing the issue.
Click to expand...
Click to collapse
In fact I got the device in dec 2012. Started to set it up and then decided to root it (including full factory reset). I only have a very minor amount of system-level applications installed. Actually the main reason to root was to use Voltage Control as I intended to limit clock rates and (if possible) voltages the same way I was used to do it on my Galaxy Tab 7 (P1000) where I was very pleased with 6-days battery lifetime.
Initially I found the minimum clock rate was set to 1GHz and I have reduced it to 304MHz (minimum with stock kernel). When I discovered first freezes/lock-ups then I reverted to default settings and found it still locking up occasionally. Meanwhile I am using _motley kernel which seems to include some voltage mod as well. Although Voltage Control does not show options to modify voltages. Then I found Trickster MOD which shows some voltage control but it seems to have no effect (at least I was used my galaxy tab to crash when undervolting too much and it's pretty "strange" to be able to set all clock voltages to 0.6V while still running stable; so I guess the settings won't have any effect right now).
I have also tried to remove all modifications and applications and/or profiles which could cause the issue without any difference. Even when run stock settings it occasionally completely locks-up the device.
Edit: I was wrong regarding voltages. In fact I found my device happily works at 1134MHz using 600mV. Since I am used to limit max clock rates to 810MHz I could simply put all voltages to 600mV without seeing a crash/reboot.
CAUTION: This does not necessarily have to apply to all devices. My one is "faster" binned Rev. 11 device. Some voltages of different users are collected here: https://docs.google.com/spreadsheet/ccc?key=0AnlqtEwFJwR6dE55WkZYSThEM3U4SGtKMVl2V1VqMmc#gid=0
I have a i9505 and I updated to android 4.4 and I have an issue with high CPU usage, I may have had the issue on 4.2 too but I am not sure.
Occasionally I notice high CPU usage and my battery life is quickly starts falling. I see two android.process.acore using a lot of CPU and I cannot kill them. When I look at them they are both com.android.process.userdictionary and seem to refuse any attempt to end the process. The only apps I had used since booting the phone was whatsapp , gosms and email app (only to view and not reply to any emails)
I have not loaded any new applications and I cannot see what has called the userdictionary process and why it keeps coming up and using high CPU.
A reboot of the device solves the issue, but it will recur again at some point.
Help?
OK so this is getting worse now.I have had t reboot the device several times today to get rid of these acore issues.
pls can someone help?
brussel said:
I have a i9505 and I updated to android 4.4 and I have an issue with high CPU usage, I may have had the issue on 4.2 too but I am not sure.
Occasionally I notice high CPU usage and my battery life is quickly starts falling. I see two android.process.acore using a lot of CPU and I cannot kill them. When I look at them they are both com.android.process.userdictionary and seem to refuse any attempt to end the process. The only apps I had used since booting the phone was whatsapp , gosms and email app (only to view and not reply to any emails)
I have not loaded any new applications and I cannot see what has called the userdictionary process and why it keeps coming up and using high CPU.
A reboot of the device solves the issue, but it will recur again at some point.
Help?
Click to expand...
Click to collapse
I'm having this problem with my NoteII LTE (GT-N7105)
Trying to find a solution - but no luck thus far.
Did you solve the issue? krtccd is always on top with up to 40% CPU usage on my Samsung Galaxy S4
vak said:
Did you solve the issue? krtccd is always on top with up to 40% CPU usage on my Samsung Galaxy S4
Click to expand...
Click to collapse
I have the same problem and I don't know the exact reason why this happens, but it is due to a mess in the swap activity of the phone. If you have a rooted phone with a kernel that let you enable or disable zram (like googy max) so try to disable it.
I think that some memory leak or some app put the memory in a bad state screwing up the swap process.
The problem should be temporary stopped if, during the high cpu activity of the krtccd process, you make a "close all" from the multi tasking manager of your phone (accessible holding the home button).
I know it is a late reply, but this could be useful if someone search the forum for a solution.
mannybiker, many thanks for your reply!
mannybiker said:
I have the same problem and I don't know the exact reason why this happens, but it is due to a mess in the swap activity of the phone. If you have a rooted phone with a kernel that let you enable or disable zram (like googy max) so try to disable it.
I think that some memory leak or some app put the memory in a bad state screwing up the swap process.
The problem should be temporary stopped if, during the high cpu activity of the krtccd process, you make a "close all" from the multi tasking manager of your phone (accessible holding the home button).
I know it is a late reply, but this could be useful if someone search the forum for a solution.
Click to expand...
Click to collapse
could you recommend some app that detects processes with a high swapping activity?
vak said:
mannybiker, many thanks for your reply!
could you recommend some app that detects processes with a high swapping activity?
Click to expand...
Click to collapse
No vak, unfortunately I have not found any app that could show me the zram used per single processes. I kept the same rom with the same config for 9 months and never experienced any problem with krtccd, then suddenly it started to happen so I think this could be related to some update the phone has made to some of my apps. The only thing I could imagine to do is a debugging period making a titanium backup of all the apps, uninstall them all, verify that the problem is solved and start restoring them periodically one after the other seeing what happen, but for the moment I have just completely removed the zram from my kernel option. It is still a controversial feature that increase available memory but also cpu and then battery consumption.
I am not a Linux expert and I have not tested this on Android, but on Linux you can try to discover the swap usage per process with something like that:
Code:
for file in /proc/*/status ; do awk '/VmSwap|Name/{printf $2 " " $3}END{ print ""}' $file; done | sort -k 2 -n -r | less