Database Develop

[Q] Why clear Dalvik and cache?

So every single rom for any phone I've seen says to clear the dalvik and the cache (or maybe its just the "dalvik cache") but when I went from stock to Thriller, I forgot to, and nothing went wrong. In fact, all my settings and apps were all intact from the previous stock rom.
I've considered that the only other phone I'd done any flashing on was a backflip, without Apps2SD and maybe that's why all my apps and settings were intact, so that still leaves me with the question: why clear it?
This may be a noob-ish question, and I apologize. Thanks for any help!

Tyqar said:
So every single rom for any phone I've seen says to clear the dalvik and the cache (or maybe its just the "dalvik cache") but when I went from stock to Thriller, I forgot to, and nothing went wrong. In fact, all my settings and apps were all intact from the previous stock rom.
I've considered that the only other phone I'd done any flashing on was a backflip, without Apps2SD and maybe that's why all my apps and settings were intact, so that still leaves me with the question: why clear it?
This may be a noob-ish question, and I apologize. Thanks for any help!
Click to expand...
Click to collapse
If there are any compatibility issues between the apk dalvik cache of your previous rom and the apks on the new rom wiping dalvik clears the previous apks stored dalvik cache. In most cases you can flash without a problem. But I recommend wiping between rom flashes just to eliminate any potential problems. Flashing something like Thriller over the stock rom you can probably get away with not wiping anything since all the apks are essentially the same. Flashing kernels you don't need to wipe anything. When flashing a rom with a completely different firmware I recommend a full data wipe. Restoring recovery backups such as nandroid require no wiping at all.
Also, wiping dalvik shouldn't affect any of your settings.
Sent from my LG-P920 using Tapatalk

+1
When switching ROM with different base apps, it is generally better to wipe caches than to get stuck in a boot loop, or having your apps and launcher FC on you. You never lose anything as the cache rebuilds itself on the next reboot, except maybe a few minutes
CallMeAria said:
If there are any compatibility issues between the apk dalvik cache of your previous rom and the apks on the new rom wiping dalvik clears the previous apks stored dalvik cache. In most cases you can flash without a problem. But I recommend wiping between rom flashes just to eliminate any potential problems. Flashing something like Thriller over the stock rom you can probably get away with not wiping anything since all the apks are essentially the same. Flashing kernels you don't need to wipe anything. When flashing a rom with a completely different firmware I recommend a full data wipe. Restoring recovery backups such as nandroid require no wiping at all.
Also, wiping dalvik shouldn't affect any of your settings.
Sent from my LG-P920 using Tapatalk
Click to expand...
Click to collapse

so, when i flashed thriller and followed the instructions, did I do a full wipe or not?
I mean if it doest it on its own, and if not, should I do one?

latinohot said:
so, when i flashed thriller and followed the instructions, did I do a full wipe or not?
I mean if it doest it on its own, and if not, should I do one?
Click to expand...
Click to collapse
If you followed the instructions you did a full data wipe. When you do this the dalvik gets wiped as well. To just wipe dalvik look under the Advanced menu in cwm recovery.
Sent from my LG-P920 using Tapatalk

clearing cache
i am using a nand rom in my HD2, and i also want to install another rom via SD in Magldr, but because of kernel issues i cannot load the Rom from SD unless i use the kernal i am advised to use. I am instructed to clear the dalvik and cache, but does this mean that i would lose anything from my current NAND rom? I still want to be able to use that of coarse so i just want to make sure there are no major risks when clearing cache.

ssj5legend said:
i am using a nand rom in my HD2, and i also want to install another rom via SD in Magldr, but because of kernel issues i cannot load the Rom from SD unless i use the kernal i am advised to use. I am instructed to clear the dalvik and cache, but does this mean that i would lose anything from my current NAND rom? I still want to be able to use that of coarse so i just want to make sure there are no major risks when clearing cache.
Click to expand...
Click to collapse
Clearing dalvik and cache wont make you lose anything, used to do it with my shift because I'd flash about 10 zips a day sometimes...
Also when it comes to flashing any ROM I format system data cache wipe dalvik cache and do a factory reset just to be sure nothing from a previous ROM is left over also wipe my SD ext partition when running an a2sd ROM, my question is can I safely manually format the emmc partition of the thrill from the mounts and storage option of cwm
Sent from my LG-P925 using Tapatalk

Stuck at "touch the android to begin"

This concerns my galaxy note n7000. I had a rooted checkrom v4 working on my note. I tried to install criskelorom v2 and got bootloops. I then tried to go back to stock via odin and flashed stock N7000 KL3 ROM which i had earlier used, I had to go to stock because after bootloop even recovery was not working. now after flashing stock i am getting a strange problem of the phone getting stuck at the welcome to gt-n7000 screen . "touch the android to begin" . nothing is happening after touching the android on the screen although i can change the language etc and even the pull down notification is also working but the phone is stuck at the initial stage. I have a nandroid backup of my initial checkrom in my internal sd card but cannot restore it before installing a rom with root and cwm. Kindly help . Thanks.

I'm having the exact problem. I'm hoping we can create a soft brick sticky thread. I walked away from my phone last night because I was getting frustrated.
My attempts to flash stock ROM via Odin resulted in the "not responding" message in windows. I can get to both CWM and download mode, however any ROM flashed via CWM results in the behavior described by the OP. fortunately I have access to another Samsung phone, so I can double check driver installation (although it worked for flashing previously).
I'm continuing a search through the forums to find some alternate methods for unbricking. Hope someone has an idea.
Thanks!

It seems that the stock roms i was trying to flash were nonwipe ones so i flashed xxla3 which is a wipe rom and was able to boot . I then flashed the earlier kl3 rom over this rom because kl3 is rootable. I then rooted and installed cwm booted into recovery and restored my earlier nandroid backup. I think the situation arises because the nonwipe rom was unable to clear the cache , user data etc

Thank you for the information. I had exactly the same problem. What did you use to root KL3 ?

Just wipe both cash and user data, and reboot.

reboot to recovery mode -> mount and storage -> format system, format cache, format data.
and do a factory reset and wipe cache.
problem should be solved cause that's what i did

Flo1389 said:
Just wipe both cash and user data, and reboot.
Click to expand...
Click to collapse
Thanks

liewkingyan said:
reboot to recovery mode -> mount and storage -> format system, format cache, format data.
And do a factory reset and wipe cache.
Problem should be solved cause that's what i did
Click to expand...
Click to collapse
daaamnnn!!! I'm scared to dead because of this!! Thanks dude!!!, no more **** ass ics

I had an issue like this once or twice.
http://www.youtube.com/watch?v=L5XjF6sPef4
This skips the that screen. then I cleared some things like google framework and it all was peachy

But its not wroking for me

[q] lg optimus 2x frozen even when reinstaling rom

Hi, im having problem with my o2x. Frirst phone started to behave strangely and every application has stop working. Error was
"uids on the system are inconsistent you need to wipe your data partition or your device will be unstable"
and then every time i restarted the phone it was the same error again so i decided to reinstall rom. Than error was gone but other problem appeared, now after 3 min of use phone get frozen and than i reinstall rom again and phone get frozen agan.
Please if someone can tell me what is the problem and how can i fix them.

You have mentioned reinstalling (reflashing?) the ROM but you haven't mentioned a factory reset so I have to ask... Have you tried a factory reset?

Should i do factory reset on rooted phone? if yes how can i do that. I read somewhere that factory reset should not be done on rooted phones. is that true?

In CWM, You always have to Wipe your Data,Cache,Dalvik Cache,Battery stats.
Optional : Format System.
For a rom to function well, else it will get all kind of problems, like you have.
Of course if you install a update for a ROM, you only have to wipe the cache/Dalvik Cache.
Remember to make a Backup of your apps with Titanium Backup.

I didnt wipe Dalvik Cache and Battery stats. I'll give it a try. What does Format System do?

The factory reset basically resets your phone to as it came from the factory. It erases all your settings and apps, and is recommended that you do that when you change from a stock ROM to a custom ROM.
Having root has nothing to do with it.
Me personally I like backing up my apps and doing a factory reset each time I change/update my ROM. This way I make sure I always have a clean system each time. Of course this might not be convenient if you like flashing a new ROM twice a week

Wipeing Dalvik Cache, Battery stats and factory reset didnt do the trick. I flashed cyanogenmode nightly now and its ok for now. Could it be problem with the rom?

"Factory reset" (/data wipe) doesn't wipe system apps. If you had on your old ROM some "broken" system app, you most likely still have it. First thing i would do is full device wipe (/data and /system partition wipe). If you dont know how to do this here is the script and how-to. Be aware of that this script can brick your phone (ofc then you can fix it with smartflash) is you won't follow instructions.
After that wipe and ofc flashing clean ROM (btw. which is it?), it still isn't working, it's most likely ROM's fault. It could be Baseband<->RIL problem eaither but i've never saw RIL problem which has influence of system stability.

Are you flashing back to stock or a custom ROM?
If you are flashing to a custom ROM, you need do all the wipe-steps and then do BacktoEXT3 before flashing the custom ROM,
http://forum.xda-developers.com/showthread.php?t=1021549

[Q] always get bootloop after formate in custom rom and custom recovery

hello frnds
i have vry strange issue with my ace.
custom roms work perfect on my phone but whenever i formate my phone from phone settings or wips from cwm i always get bootloop.
so i have to flash again rom every time.
stock rom + stock recovry formating works well.
but why in custom roms i get bootloop after formate.

arshad522 said:
hello frnds
i have vry strange issue with my ace.
custom roms work perfect on my phone but whenever i formate my phone from phone settings or wips from cwm i always get bootloop.
so i have to flash again rom every time.
stock rom + stock recovry formating works well.
but why in custom roms i get bootloop after formate.
Click to expand...
Click to collapse
That it's normal, there're custom roms that come pre-configured (necessary for booting)... when you do the wipes you break that initial configuration (necessary for booting) and that's end in bootloop

Viper The Ripper said:
That it's normal, there're custom roms that come pre-configured (necessary for booting)... when you do the wipes you break that initial configuration (necessary for booting) and that's end in bootloop
Click to expand...
Click to collapse
does this loop happen to every ace user after wipes.
why intial configure break in just wipes.
i have to reflash the rom or restrore nandroid all the time after wipes.
is there any other permanent solution for this.

arshad522 said:
does this loop happen to every ace user after wipes.
why intial configure break in just wipes.
i have to reflash the rom or restrore nandroid all the time after wipes.
is there any other permanent solution for this.
Click to expand...
Click to collapse
Yes... about this, could @Mardon inform you in a better way
Our ace hasn't much internal memory, neither official Samsung 4.x versions, also when you do a "wipe", you format partitions as; /system, /data... they contain important information for the boot, these information isn't permanent and is deleted after that so, then our Ace can't boot

Viper The Ripper said:
Yes... about this, could @Mardon inform you in a better way
Our ace hasn't much internal memory, neither official Samsung 4.x versions, also when you do a "wipe", you format partitions as; /system, /data... they contain important information for the boot, these information isn't permanent and is deleted after that so, then our Ace can't boot
Click to expand...
Click to collapse
when i do wipes, it just erase user data and cache. then how it erase any thing( any partition) that is neccrsry for boot.
i could not find any solution on google.

could not find any solution
no one is replying :crying:

arshad522 said:
could not find any solution
no one is replying :crying:
Click to expand...
Click to collapse
I completely agree with what @Viper The Ripper said. Most custom roms comes with preconfigured boot settings some of which are installed in the data part too. These preconfigured boot files are usually installed during your first boot which is why the first boot of any custom rom takes some time. So as long as you do a Wipe Cache Partition, you will have no problems. But if you do a Wipe Data/ Factory Reset or Wipe Dalvik Cache, then it will delete the preconfigured boot setting files. So next time when you restart, your phone cannot complete the booting because of the missing files and hence your phone gets in a bootloop. You can still solve this by reinstalling the same rom again from the recoverymod so that it can again reinstall the preconfigued boot setting or restore a nandroid backup to restore the boot settings. Hope I helped

mahithm said:
I completely agree with what @Viper The Ripper said. Most custom roms comes with preconfigured boot settings some of which are installed in the data part too. These preconfigured boot files are usually installed during your first boot which is why the first boot of any custom rom takes some time. So as long as you do a Wipe Cache Partition, you will have no problems. But if you do a Wipe Data/ Factory Reset or Wipe Dalvik Cache, then it will delete the preconfigured boot setting files. So next time when you restart, your phone cannot complete the booting because of the missing files and hence your phone gets in a bootloop. You can still solve this by reinstalling the same rom again from the recoverymod so that it can again reinstall the preconfigued boot setting or restore a nandroid backup to restore the boot settings. Hope I helped
Click to expand...
Click to collapse
i completly agree with you both.
this is realy frustating that we cant factory data reset in custom roms.
i was looking some alternative but the only solution is reflash or restore nandroid.
anyway thnks for reply

arshad522 said:
i completly agree with you both.
this is realy frustating that we cant factory data reset in custom roms.
i was looking some alternative but the only solution is reflash or restore nandroid.
anyway thnks for reply
Click to expand...
Click to collapse
No problem buddy

[Q] Phone Stuck At Boot Animation Screen

Hello Everybody, My phone is Samsung Galaxy Ace S5830 and I have an issue.I am the one who is changing rom constantly.I was using the rom named ''Xperiance-Ace-v4_Sky_Walker_Studios'' for a long time.Lately i loaded another rom, 2 hours after i used, The phone was closed by itself, I tried open phone again but it stayed at boot animation screen.After that, I thought that rom is spoilt, I tried other roms but they stayed at boot animation screen as well.I tried all of roms that i have but result was same.I thought that i should try the rom which i was using before all those problems started.So i flashed Xperiance-Ace-v4_Sky_Walker_Studios Rom.Bizarre but it worked.When it opened i have faced with some pop-up ''android upgrading 0/70'' when it finished (70/70) i was at homescreen and all of my apps that i downloaded when i was using this rom at old days was there.It was so weird, And all aplications started to stop itselves and i even havent touched any of them. Like ''Unfortunately Whatsapp has stopped'' ''Unfortunately contacts has stopped'' ''Unfortunately facebook has stopped'' finally they all stoped working and i tried open applications, No application opened even contacts.
Present state: Only one rom is working, Others staying at boot animation screen and the rom which is working actually not working, Only phone is opening, No application working
What is the Problem? What Should i do? I am waiting your answers, THANKS.

Talha10 said:
Hello Everybody, My phone is Samsung Galaxy Ace S5830 and I have an issue.I am the one who is changing rom constantly.I was using the rom named ''Xperiance-Ace-v4_Sky_Walker_Studios'' for a long time.Lately i loaded another rom, 2 hours after i used, The phone was closed by itself, I tried open phone again but it stayed at boot animation screen.After that, I thought that rom is spoilt, I tried other roms but they stayed at boot animation screen as well.I tried all of roms that i have but result was same.I thought that i should try the rom which i was using before all those problems started.So i flashed Xperiance-Ace-v4_Sky_Walker_Studios Rom.Bizarre but it worked.When it opened i have faced with some pop-up ''android upgrading 0/70'' when it finished (70/70) i was at homescreen and all of my apps that i downloaded when i was using this rom at old days was there.It was so weird, And all aplications started to stop itselves and i even havent touched any of them. Like ''Unfortunately Whatsapp has stopped'' ''Unfortunately contacts has stopped'' ''Unfortunately facebook has stopped'' finally they all stoped working and i tried open applications, No application opened even contacts.
Present state: Only one rom is working, Others staying at boot animation screen and the rom which is working actually not working, Only phone is opening, No application working
What is the Problem? What Should i do? I am waiting your answers, THANKS.
Click to expand...
Click to collapse
Are you do a full wipe, before flashing another custom rom?

I did Wipe data factory reset, Wipe cache partition, Advanced>Wipe Dalvik cache

Talha10 said:
I did Wipe data factory reset, Wipe cache partition, Advanced>Wipe Dalvik cache
Click to expand...
Click to collapse
I suggest you install the stock rom using odin. It seems you have some corrupted files. Before flashing the stock rom, do Format Data/ Factory Reset, Format Cache Partitions, Mount & Storage> Format /system, Wipe Dalvik Cache and Wipe Battery Stats. Once you have flashed the stock rom, go to recovery mod and do Wipe Data/ Factory Reset and Wipe Cache Partition (otherwise bootloop might occur). After that install root and CWM from the recovery mod. Now you can install any other custom rom without any problem. Do post your results. Hope I Helped

When i connect phone to the computer, connecting text under phone logo is occuring in kies, But not connecting
And neither in download mode nor not in download mod odin can't see the phone at all

Talha10 said:
When i connect phone to the computer, connecting text under phone logo is occuring in kies, But not connecting
And neither in download mode nor not in download mod odin can't see the phone at all
Click to expand...
Click to collapse
Uninstall kies, and then download driver for galaxy ace.
Maybe, there is something wrong with your recovery, what recovery do you use?
---------- Post added at 06:03 AM ---------- Previous post was at 06:00 AM ----------
Talha10 said:
When i connect phone to the computer, connecting text under phone logo is occuring in kies, But not connecting
And neither in download mode nor not in download mod odin can't see the phone at all
Click to expand...
Click to collapse
Uninstall kies, and then download driver for galaxy ace.
Maybe, there is something wrong with your recovery, what recovery do you use?
And, try redownload, and flash that rom again. Maybe, it's corrupted.

i unistalled and nothing happened.
And there is no problem about driver because pc is recognizing the phone which means it's was already updated.
ClockworkMod Recovery version is v4.0.0.9
And i flashed many times

Talha10 said:
i unistalled and nothing happened.
And there is no problem about driver because pc is recognizing the phone which means it's was already updated.
ClockworkMod Recovery version is v4.0.0.9
And i flashed many times
Click to expand...
Click to collapse
Try installing CWM 5 from the recovery mod. CWM 5 is much more stable than CWM 4. Once you have installed CWM 5, do Format Data/ Factory Reset, Format Cache Partitions, Mount & Storage> Format /system, Wipe Dalvik Cache and Wipe Battery Stats. Then try to flash any working rom with it. Here is the link,
CWM 5.0.2.6 fix for Samsung Galaxy Ace S5830
Do post your result. Hope I Helped

i did all of the things that you said but result is same
edit: Yeeeesss now i istalled Xperiance-Ace-v4_Sky_Walker_Studios but it wasnt like old instalations, Old applications didn't come.Rom was opened like new phone, There is no problem now, Everything in phone are opening.
But why could'nt i install other roms.Of course i can continue with this rom it's better than none i mean at least i can use phone without problem.It is perfect but if can we solve the problem for other roms it will be very perfect, By the way thank you for your helps

Talha10 said:
i did all of the things that you said but result is same
edit: Yeeeesss now i istalled Xperiance-Ace-v4_Sky_Walker_Studios but it wasnt like old instalations, Old applications didn't come.Rom was opened like new phone, There is no problem now, Everything in phone are opening.
But why could'nt i install other roms.Of course i can continue with this rom it's better than none i mean at least i can use phone without problem.It is perfect but if can we solve the problem for other roms it will be very perfect, By the way thank you for your helps
Click to expand...
Click to collapse
Bro, are you sure you can't install any other rom with CWM 5? Never forget to do Format Data/ Factory Reset, Format Cache Partitions, Mount & Storage> Format /system, Wipe Dalvik Cache and Wipe Battery Stats before you install any other rom. Also click the Thank button to thank us for our time. Do post the results. Hope I Helped

mahithm said:
Bro, are you sure you can't install any other rom with CWM 5? Never forget to do Format Data/ Factory Reset, Format Cache Partitions, Mount & Storage> Format /system, Wipe Dalvik Cache and Wipe Battery Stats before you install any other rom. Also click the Thank button to thank us for our time. Do post the results. Hope I Helped
Click to expand...
Click to collapse
Yes im sure i do all of them always