Switching between ROMs? - Nexus 6P Q&A, Help & Troubleshooting

I am currently running Cataclysm and have nandroid backups of both stock and Cataclysm. I'd like to try CM13, but I'm wondering if I'll be able to easily switch back and forth between the two by simply restoring backups? Or do I have to clean install each time? I'm pretty sure I can, I'm not new to flashing, but I've never tried going back and forth and wasn't sure if there would be any issues to watch out for.

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Making a proper back up with TWRP

Greeting everyone,
I just got my SGS4 and love it! I just rooted it and have my hotspot working. I was wondering if someone can tell me the proper way to back up my stock rom completely? I have TWRP and backed up BOOT, SYSTEM and DATA and it finished successfully. Is this all I need to do to back up and be able to reinstall my stock rom if I decide to try a new rom and then go back to stock? I just want to be sure. Any thoughts?
Boot, system, data is pretty much enough. I only back those up and never the others (recovery, cache) and it worked well for the 5-10 times I've had to restore. I did backup the efs on its own just in case. Some people like to do everything including cache and recovery but I don't see much point in this.
http://teamw.in/whattobackup

All ROMs I flash on my device have become unstable

I've had my S4 for a little over a week now. I've been flashing different ROMS to find which one I like but all of them except for CleanROM are very, very unstable on my phone. I've tried CM, SlimBean, Graviton, and PACMan. Some are TW, some are AOSP but I get the same results for each. Device becomes unresponsive, I get FCs, random reboots. Its crazy because I had no issues at all on my Note 2. I wipe and factory reset every time, its becoming very tedious to restore each time. I do not restore system apps, I follow all instructions and still get these results. I'm wondering if I have a faulty device? Maybe a sensor or something is not liking certain things on certain apps? I've noticed that after I installed Graviton and went back to CleanROM, Titanium has stopped working and I get the Samsung lockscreen instead of the SGS4 one. I may just go back to MDL stock in Odin, re-root and see what happens...I'm currently wiping everything and fixing permissions
Sorry to hear, sometimes starting over cures 90% of all issues, and the os gets better each time.. If it were me, I would quit wasting time and odin.
Thanks, and good luck.
Don't Forget -
jedimyndtryx said:
I've had my S4 for a little over a week now. I've been flashing different ROMS to find which one I like but all of them except for CleanROM are very, very unstable on my phone. I've tried CM, SlimBean, Graviton, and PACMan. Some are TW, some are AOSP but I get the same results for each. Device becomes unresponsive, I get FCs, random reboots. Its crazy because I had no issues at all on my Note 2. I wipe and factory reset every time, its becoming very tedious to restore each time. I do not restore system apps, I follow all instructions and still get these results. I'm wondering if I have a faulty device? Maybe a sensor or something is not liking certain things on certain apps? I've noticed that after I installed Graviton and went back to CleanROM, Titanium has stopped working and I get the Samsung lockscreen instead of the SGS4 one. I may just go back to MDL stock in Odin, re-root and see what happens...I'm currently wiping everything and fixing permissions
Click to expand...
Click to collapse
Don't forget to immediately freeze the ATT update apps... Or you will get the MF3 OTA... which, for now, is NOT-ROOTABLE & Custom Recoveries NOT-Installable.
I always factory reset,wipe both cache and format system.even when I use a back up.
Sent from my SAMSUNG-SGH-I337 using xda premium
Well I ODIN'ed and went back to CleanROM. So simple. I'm dying to try one of the VZW AOSP themed TW ROMs though. Decisions, decisions. Oh man....when I first got the phone it was on MF3. I spent 3 days on craigslist and found someone to trade me their non-updated phone. Still new to this Android business. So far I love it. Don't see why I spent so many years hating. Thank you all for the help.

[Q] Hangs on Samsung logo on restart (rooted)

Hello, I rooted my handset yesterday following the tutorial on Android Forums, my Vodafone (UK) branded build is JDQ39.I9505XXUBMEA
I also installed CWM PhilZ Touch 5 (v6.0.3.7)
It works fine inside the OS but occasionally, when I restart the phone, it just hangs on the Samsung Mobile logo?
When that happens, I have to hold the power button then hold Up+Home and boot into PhilZ and then go to Reboot System Now and that restarts the phone mostly back into Android as normal.
Any ideas what the problem could be?
Good question. Haven't come accross something like that. I suggest flashing whatever ROM you want. It should get rid of your problem. If you still want a stable rom with all Samsung features, download Wanamlite 2.0 rom. It's a very good replacement for your stock rom. Or you can try Omege rom. It includes all samsung bloatware incl. S HEALTH etc.
Good luck and let us know! :thumbup:
Thanks for the quick reply.
I have used CWM to do a full data back up onto my SD card. As I'm new to rooting, is there a way I can restore that data onto a new rom so I don't have to keep setting up my phone completely? Even like, settings and shortcuts on the home screen etc?
Not really. What you can do is backup all your apps etsc with Titaniumbackup. With this you can restore all apps+data.
Setting up your phone isn't that bad considering its only settings.
Tha initial backup youve made through CWM is only a backup of your system. I dont think this includes all apps. I never revert to a previous rom. I prever a clean install to have the best rom exlerience without bugs etc.
If you try a new rom. And you dont like it at all(not likely) or for whatever reason you want to revert to you stock rom. You can restore it via CWM. Thats about the only reason why youve made that backup.
Good luck.
Oh yes, one more thing. Remember to press the Thanks button :thumbup:
Will that (Titanium) back up my apps exact settings as well? Say like my login details or custom settings I have changed within an app?
So the back up I made using CWM (which was complete data and apps and cache I think?) can restore my phone to exactly the instance when I pressed back up including the ROM?
To be honest, I'd be interested in the same Vodafone rom that's rooted so I can just use Titanium to freeze the bloatware, I've had a look at the recommended ROMs which have options to disable loads of Samsung bloatware but I use a lot of them...

[Q] Systemui keeps crashing on custom roms

Need some expert assistance. The problem is my phone keeps crashing with systemui errors when using custom roms. It always happens after a reboot and usually within 1-3 days, depends on WHEN I reboot the phone. Let me give you a little backstory.
A little over a month ago, I was running AICP on my phone, but decided to try SimpleAOSP and Hells doctor.. So I created a backup in TWRP, then flashed SimpleAOSP and HD. The next day day I started getting the errors. At the time, I thought it was the kernel or a Titanium Backup glitch.
So I wiped and reflashed SimpleAOSP without HD and without restoring from TB. But the next day, systemui failed to start. I thought it might be a rom issue so I restored AICP from my TWRP backup. And I couldn't believe it when the same systemui errors happened. So I restored the backup again. Again it was okay for a few days, then error.
After that I copied everything from my phone to the PC and wiped internal storage. Then installed the same rom version from AICP that I had been using for weeks prior to all this. Same error after a few days.
So next I tried wiping internal storage again and flashing stock 4.4.4. I used that for over a week with no system errors. So I did a TWRP backup of Google stock rom, Then installed AICP again but this time without modifying any systemui type settings, I left the rom as stock as it could come. Didn't even restore apps or anything. I then the rebooted the phone a couple of times to test and the error came back. This was the same day I installed it.
So I restored the stock backup and have been running fine all week. I want to get back on a custom rom though. Any suggestions?
Am I getting no replies because I'm missing something really obvious?
Or can no one think of anything that I haven't already tried?
By the way, right after posting the OP I installed the L preview and it's been working fine so far. I figured if I had to run stock android it may as well be the latest thing.
Sent from my Nexus 4 using Tapatalk
I don't have any answer to your question but I was wondering if this happens without installing a custom kernel on CM11 and AOSP custom ROMs.
Thanks for replying.
When I tried SimpleAOSP, it was with and then without an additional kernel. I saw no difference as far as the error is concerned. I have not tried a CM11 based ROM since this all started.
Maybe I should try a custom rom that doesn't have heavy modifications like AICP has.
Sent from my Nexus 4 using Tapatalk
Are you flashing a Gapps package? A couple weeks ago when I was trying different ROMs I was getting system crashes after flashing PA Gapps and they updated. I never narrowed it down, but after uninstalling a bunch of them (News/Weather, Talkback, Keep, Newsstand, some others) so they wouldn't update, I stopped getting system crashes.
Idk why I have the feeling your theme/icon pack has something to do with it. I run pa and whenever I try to use click ui icon pack it happens to me but if I just run veu I don't have a problem. Try not using themes for a bit to see what happens
Sorry, I missed your responses, I had kinda given up on the whole thing. Android L is running good for an unfinished product.
Getting back to the original issue, no theme or icon pack was installed.
Yes, I was using PA gapps mini from 9-23. Maybe that was it.
But that would be weird because I don't remember my first ROM running PA gapps, not 100% sure... that was a month ago.
I'll try to install without any gapps package and report back. Thanks.
Sent from my Nexus 4 using Tapatalk
from my past history, I'm facing issues when I did 3 things :
1. if I just dirty flash or factory reset only before flashing new rom.
2. Did restore backup from TB (which from your explanation above, you don't have any problem TB)
Nowdays I always use wipe dalvik, system, data, cache. Because someone once told me if you changing roms, if not it's possible that the system setting from old rom will crash with the new ones. and for the wipe system part (some roms included that command in their roms zip file and some didn't).

[Q] Failed recovery of nandroid backup - why???

Hi all,
Some time ago i asked, and received, some support on these forums on how to properly carry out a nandroid backup... following the sound advice i got, i carried out my backup (using TWRP for the record, with all the options checked), and stored it away for a rainy day... said day came yesterday, when i messed up my system and rendered it instable (i tried to manually delete the dalvik cache directory in order to free up the 2,5GB of space it was taking)... since i knew there was i high chance of this ending in disaster, the last thing i did before the delete was carry out another nandroid, so i could easily return to where i had left off... how wrong i turned out to be
as soon as i the system became instable following my experiment of deleting the d. cache directory, i recovered the latest nandroid (i.e. the one i had made just hours before) and everything seemd to go smoothely until the first reboot... when the following happened:
- first reboot after recovery took ages, much like the first reboot following the flashing of a new rom... not the end of the world, but that was the first sign that all was not well
- the status bar disappeared, and there was no way of making it come back (i.e. nothing to do with the launcher, i typically use apex but i i tried switching to both nova and touchwiz which i also kept up to date but the stats bar was nowhere to be seen)
- even if not having a status bar with all the info on it is acceptable (which of course it isn't, but lets just say), the sytem became completely instable after 5minutes of operation... with each app taking turns to shutting down until i kept getting the message "system UI has closed" over and over, to the point that doing a reboot was challenging since i barely had the time to press on the screen between instances of this bloody error message appearing...
...i did of course try and return to my older nandroid backup, but... lo and behold... exactly same behaviour...
so now i have resorted to formatting the internal memory card and flashing a new rom and basically starting over... just what i hope the nandroid would spare me basically :/
question is: does this sort of error sound familiar to anyone? can someone give me a tip maybe on what i may have done wrong?
any opinion, tips& advice much appreciated
I have the exact same problem. It happens on TW Lollipop ROMs. Haven't found a fix. I'm using Philz Touch Recovery and the old no knox bootloader.
Anyone? I have researched this but cannot find any similar problems reported... it can't just be me and pavelcheto...
Maybe it a recovery fault. Faulty backup or faulty restore.
No problems with my older backups. I restored my KitKat TW backup, working fine. Restoring CM12 backups also works fine. I've looked for a new recovery, Philz is discontinued, CWM hasn't been updated for a year and I really don't like TWRP.
I use TWRP 2.8.3.0 and never have (and hopefully never will) encountered any issues with restoring backups.
Considering i recovered 2 separate backups for a total of 3 times (i tried recovering the first backup twice) i doubt the issue was with the recovery itself... however since pavelcheto had no issues with the kk recovery maybe it could be lollipop related?
Anyone successfully recovered a lollipop nandroid backup?
platypus78 said:
Considering i recovered 2 separate backups for a total of 3 times (i tried recovering the first backup twice) i doubt the issue was with the recovery itself... however since pavelcheto had no issues with the kk recovery maybe it could be lollipop related?
Anyone successfully recovered a lollipop nandroid backup?
Click to expand...
Click to collapse
I recovered my lollipop gpe backup a couple of times without a problem.
Data encryption may cause restoring problems.
I have restored CM12 backups (based on 5.0.2) serveral times, no problem there. I've had issues only with TouchWiz Lollipop ROMs, I have tried different custom roms, all get bugged at restore.
pavelcheto said:
I have tried different custom roms, all get bugged at restore.
Click to expand...
Click to collapse
Just to make sure I understand correctly : you mean all TW custom roms you've restored have had problems?
Wonder if anyone else has managed a bug-free restore of a 5.x TW?
Yes, but only on Lollipop. KitKat TW roms restore just fine. I am using Philz Touch Recovery. I have tried 3 different TW Lollipop roms and they all fail to restore properly. No wallpaper, black wallpaper and no status bar. And after a minute or two System UI starts crashing. If then I do factory reset from recovery and the rom starts normally (welcome guide and stuff) and works fine.
bumping this thread because i cant seem to find a solution for this anywhere.
TheAwesomeBit said:
bumping this thread because i cant seem to find a solution for this anywhere.
Click to expand...
Click to collapse
There's no solution for this as per comments above. TW LP is not restorable. You can flash a new lollipop ROM tho'
Sent from my GT-I9505

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