Earlier today I was mucking about and decided to play around with the fingerprint scanner for the first time. When I went in to settings and clicked the fingerprint manager, I received an error stating that the scanner is borked, and to reset my device to fix it. Rebooting did not fix the issue.
Soon I found another person with the same issue, who said that he was able to fix it by flashing stock NJ7 via Odin. After a bit of chatter we realized that neither he nor I had set up the fingerprint scanner before flashing a ROM. We basically booted the phone and went straight to rooting it, and flashing ROMs on it.
I can confirm that re-flashing the stock ROM via odin allowed me to set up the scanner successfully, and that the functionality has not been affected by any subsequent ROM flashing.
I do not understand the mechanism behind why this happens, it is just my experience. Perhaps there is some sort of validation that is run the first time you use the scanner, making sure you are running official firmware, and then setting a flag somewhere? How then would that flag be saved for all subsequent rom flashes? Hidden partition or some ****? Hardware flag? I dunno I don't get it, but I figured out how to fix it by golly. Hopefully this helps someone else.
If any others can confirm the same issue, we may want to add this as a step in the rooting/romming how-to threads, so that others don't run into the same issue.
One good thing is that when I flashed stock via odin, it didn't wipe my data. I was able to then flash TWRP and then Dynamic Kat again, keeping all of my settings the whole way through. Ended up not being as much of a hassle as I thought it was going to be :good:
Thank you for sharing this, I have to say in my case it is not working now i did get the phone rooted and then added jovys rom then did my setup the fingerprint scanner worked for me, then i installed dynamic rom and then the later update of same rom and then the fingerprint scanner is no longer working for me there is a new update for the rom i am going to flash and see if it works now as in a previous version the bloat from samsu g had been removed and with jovys rom being stock rooted it was still there, so i am wondering if it has to do with some of the bloat from Samsung and it being removed that breaks the fingerprint scanner, i will report after i flash the new version of dynamic.
santos.moreno3 said:
Thank you for sharing this, I have to say in my case it is not working now i did get the phone rooted and then added jovys rom then did my setup the fingerprint scanner worked for me, then i installed dynamic rom and then the later update of same rom and then the fingerprint scanner is no longer working for me there is a new update for the rom i am going to flash and see if it works now as in a previous version the bloat from samsu g had been removed and with jovys rom being stock rooted it was still there, so i am wondering if it has to do with some of the bloat from Samsung and it being removed that breaks the fingerprint scanner, i will report after i flash the new version of dynamic.
Click to expand...
Click to collapse
I first noticed the problem while I was on Dynamic Kat 1.1 and thought the same thing, that it was something to do with the Sammy apps, but it still didn't work after updating to DK 1.2. I've had it both working and non-working whilst running the same ROM (1.2,) and the only thing different between the two instances was the fact that I configured it while I was in stock in one instance.
This is important information. Hopefully the devs will be able to fix this asap. Thanks!!
Wow thank you BotsOne! I'm having the same issue. I'll try this in the morning. Before I rooted, I set up the fingerprint scanner and it worked fine the I switched back to swipe, then rooted. After rooting I installed Jovys rom and lo it hasn't worked since. Does the lock screen have to be set to fingerprint scanner at the time of flashing roms or can you set it up once and move on from that point forward? Thanks again!
android242 said:
Wow thank you BotsOne! I'm having the same issue. I'll try this in the morning. Before I rooted, I set up the fingerprint scanner and it worked fine the I switched back to swipe, then rooted. After rooting I installed Jovys rom and lo it hasn't worked since. Does the lock screen have to be set to fingerprint scanner at the time of flashing roms or can you set it up once and move on from that point forward? Thanks again!
Click to expand...
Click to collapse
Honestly I'm not sure. We need a few more people with the same error to get to the bottom of what's going on here. I could be way off with my assumption. We need a bit more info.
Cool I'll try tomorrow and report back..
BotsOne said:
Earlier today I was mucking about and decided to play around with the fingerprint scanner for the first time. When I went in to settings and clicked the fingerprint manager, I received an error stating that the scanner is borked, and to reset my device to fix it. Rebooting did not fix the issue.
Soon I found another person with the same issue, who said that he was able to fix it by flashing stock NJ7 via Odin. After a bit of chatter we realized that neither he nor I had set up the fingerprint scanner before flashing a ROM. We basically booted the phone and went straight to rooting it, and flashing ROMs on it.
I can confirm that re-flashing the stock ROM via odin allowed me to set up the scanner successfully, and that the functionality has not been affected by any subsequent ROM flashing.
I do not understand the mechanism behind why this happens, it is just my experience. Perhaps there is some sort of validation that is run the first time you use the scanner, making sure you are running official firmware, and then setting a flag somewhere? How then would that flag be saved for all subsequent rom flashes? Hidden partition or some ****? Hardware flag? I dunno I don't get it, but I figured out how to fix it by golly. Hopefully this helps someone else.
If any others can confirm the same issue, we may want to add this as a step in the rooting/romming how-to threads, so that others don't run into the same issue.
One good thing is that when I flashed stock via odin, it didn't wipe my data. I was able to then flash TWRP and then Dynamic Kat again, keeping all of my settings the whole way through. Ended up not being as much of a hassle as I thought it was going to be :good:
Click to expand...
Click to collapse
Yes, I am quoting the entire op...
Give me some more evidence of this and I will edit the Root & Recovery Guide immediately... I have seen conflicting posts on this matter too... Also, is not clear if private mode does continue to work after rooting or not... Can anyone confirm... (without flashing any roms... from original unrooted to rooted) Private mode... does work or not??? (Private mode is not suppose to work after rooting... but some say it does work???)
Nice post! Come on people... help...
Before you back up your rom, disable fingerprint scanner and delete saved fingerprints. If you don't and you go do your backup and ever plan on using the scanner again on that backup, it won't work. One of the guys thinks it has to do with the fingerprints being encrypted so when you restore, it can't decrypt it and locks you out.
I can confirm personally that disabling it before you do your backup then flashing a new rom then restoring your old backup, the fingerprint scanner will still work. Just have to set it up again. But that is a whole lot easier then flashing stock with odin again and starting over.
inphamous36 said:
Before you back up your rom, disable fingerprint scanner and delete saved fingerprints. If you don't and you go do your backup and ever plan on using the scanner again on that backup, it won't work. One of the guys thinks it has to do with the fingerprints being encrypted so when you restore, it can't decrypt it and locks you out.
I can confirm personally that disabling it before you do your backup then flashing a new rom then restoring your old backup, the fingerprint scanner will still work. Just have to set it up again. But that is a whole lot easier then flashing stock with odin again and starting over.
Click to expand...
Click to collapse
I think this may be an additional problem for flashers, but not necessarily the same one I am addressing. The reason I say this is because I hadn't configured the scanner at all previous to when I discovered that mine didn't work, the error completely prevents me from opening the fingerprint manager. I couldn't even enable the fingerprint function to begin with. Does that make sense?
Not trying to argue just trying to make sure we are on the same page =)
Just noticed my fingerprint scanner isn't working. Wtf lol
Sent from my SM-N910T using Tapatalk
i notice this problem as soon as i flashed first rom the only way o get it working again is flashing back to stock odin but no matter what i do as soon as i flash a rom I get a error message ? here the post another member had the same problem
http://forum.xda-developers.com/note-4-tmobile/help/fingerprint-sensor-error-t2918069
inphamous36 said:
Before you back up your rom, disable fingerprint scanner and delete saved fingerprints. If you don't and you go do your backup and ever plan on using the scanner again on that backup, it won't work. One of the guys thinks it has to do with the fingerprints being encrypted so when you restore, it can't decrypt it and locks you out.
I can confirm personally that disabling it before you do your backup then flashing a new rom then restoring your old backup, the fingerprint scanner will still work. Just have to set it up again. But that is a whole lot easier then flashing stock with odin again and starting over.
Click to expand...
Click to collapse
Thats not entirely accurate.
I set up my stock rom with the FP scanner...backed up in twrp as usual and i have flashed 4 roms since then and had to set it up gain each time and never had a problem. Ive never disabled it once.
sent from Canada via my Note 4, 3, 2 or One X+
So what exactly must be done to preserve fingerprint scanner functionality before flashing a custom rom?
force70 said:
Thats not entirely accurate.
I set up my stock rom with the FP scanner...backed up in twrp as usual and i have flashed 4 roms since then and had to set it up gain each time and never had a problem. Ive never disabled it once.
sent from Canada via my Note 4, 3, 2 or One X+
Click to expand...
Click to collapse
Have you tried restoring a backup and using the scanner? That's when it breaks. I can flash roms fine without having to disable it, but it didn't work after I restored a rom that had it enabled. Locked out of it
JawjaBill said:
So what exactly must be done to preserve fingerprint scanner functionality before flashing a custom rom?
Click to expand...
Click to collapse
I can tell you my history. I setup the fingerprint scanner right away before flashing anything as it is a must have feature for me. Later, I flashed a couple different ROM's and never had an issue. Just had to setup the fingerprint again. So my guess is if you set it up before flashing any ROM, you should be good. At least I was. I haven't had to disable before flashing or anything like that.
COCODRILO45 said:
i notice this problem as soon as i flashed first rom the only way o get it working again is flashing back to stock odin but no matter what i do as soon as i flash a rom I get a error message ? here the post another member had the same problem
http://forum.xda-developers.com/note-4-tmobile/help/fingerprint-sensor-error-t2918069
Click to expand...
Click to collapse
force70 said:
Thats not entirely accurate.
I set up my stock rom with the FP scanner...backed up in twrp as usual and i have flashed 4 roms since then and had to set it up gain each time and never had a problem. Ive never disabled it once.
sent from Canada via my Note 4, 3, 2 or One X+
Click to expand...
Click to collapse
JawjaBill said:
So what exactly must be done to preserve fingerprint scanner functionality before flashing a custom rom?
Click to expand...
Click to collapse
inphamous36 said:
Have you tried restoring a backup and using the scanner? That's when it breaks. I can flash roms fine without having to disable it, but it didn't work after I restored a rom that had it enabled. Locked out of it
Click to expand...
Click to collapse
keitht said:
I can tell you my history. I setup the fingerprint scanner right away before flashing anything as it is a must have feature for me. Later, I flashed a couple different ROM's and never had an issue. Just had to setup the fingerprint again. So my guess is if you set it up before flashing any ROM, you should be good. At least I was. I haven't had to disable before flashing or anything like that.
Click to expand...
Click to collapse
And... We ALL agree that Private Mode is Not working...? Right... No Private Mode since rooting... Right? There is absolutely nobody with Private Mode still working after rooting...
TEKHD said:
And... We ALL agree that Private Mode is Not working...? Right... No Private Mode since rooting... Right? There is absolutely nobody with Private Mode still working after rooting...
Click to expand...
Click to collapse
I think once you root the KNOX counter gets tripped preventing private mode.
keitht said:
I think once you root the KNOX counter gets tripped preventing private mode.
Click to expand...
Click to collapse
Yeap I know... but there is this:
http://forum.xda-developers.com/galaxy-s5/development/mod-enable-private-mode-knox-0x1-t2904723
That almost nobody seems to know... It's actually possible to regain Private Mode after a tripped Knox... (Not impossible)
TEKHD said:
And... We ALL agree that Private Mode is Not working...? Right... No Private Mode since rooting... Right? There is absolutely nobody with Private Mode still working after rooting...
Click to expand...
Click to collapse
Well now....never tried it but just did and its working for me. Rooted, jovy23 deodexed stock, twrp.
The day i got my phone i odin'd update then installed twrp, then wiped everything but int & ext sdcard, rebooted to recovery, wiped again then flashed the deodexed stock rom.....just tested fingerprint unlock last night for the first time, no problems and just now tested private mode and again that works for me.
keitht said:
I think once you root the KNOX counter gets tripped preventing private mode.
Click to expand...
Click to collapse
Well, I configured my 6P with the fingerprint/pin combo at startup and was using it like that...
I then disabled any security, and that meant wiping off my fingerprints.
I then tried to set everything up again, that means fingerprint+PIN. It set up correctly, I even set up to ask for PIN each time I reboot the device... This is where it gets weird.
When I booted up for thr first time, and went through Imprint+PIN setup, whenever I'd restart the phone, it would greet me with the secure startup screen , asking for my PIN in order to continue starting up the device. It would then boot me to my lockscreen. Where I'd have to input my PIN/fingerprint in order to unlock to desktop.
Now that I re-set it up, it will ask me for my PIN before booting up, but now it won't boot me to my lockscreen, but directly to desktop.
If I disable asking for PIN at boot, I get booted to lockscreen.
How can I restore functionality? Is this normal?
Since this is an Android N Dev Preview regarding issue, you should report it to Google if at all. Dev Preview is not meant to be used as a daily driver and some bugs should be expected to experience.
neisor said:
Since this is an Android N Dev Preview regarding issue, you should report it to Google if at all. Dev Preview is not meant to be used as a daily driver and some bugs should be expected to experience.
Click to expand...
Click to collapse
But it was working accordingly on N. I bet it's an issue even on MM.
benleonheart said:
But it was working accordingly on N. I bet it's an issue even on MM.
Click to expand...
Click to collapse
I do not think this issue is affecting MM.
Anyway, was the security working before on Dev Preview 4? Or it worked on previous Dev Previews and on the 4th it's not?
neisor said:
I do not think this issue is affecting MM.
Anyway, was the security working before on Dev Preview 4? Or it worked on previous Dev Previews and on the 4th it's not?
Click to expand...
Click to collapse
Workes on previous and on 4.
Disabled PIN/fingerprints and re enabled them and set them up again but to no avail...
Hey!
today I noticed something very weird on my OnePlus 5 (64GB)
somehow unlocking the phone with the fingerprint scanner isn't working anymore!
it always says that I have to use my code, like when you unlock it the first time after powering on!
the hardware is working, fingerprint scan works for example fine with my banking app and the option is still available in the settings menu!
Android 7.1.1
security patch 1st september 2017
francokernel 4.4.21
xxx nolimits rom 4.2 based on oos 4.5.14
rooted with magisk
xposed framework v88.2 installed
I did not make any changes to the phone, it simply stopped working!
I have already removed the security unlock and added new fingerprint scans, it did not work...
can anybody help me?
Are you using Greenify? If so, make sure "Alternative Screen Off mode" is enabled in Settings.
Sent from my ONEPLUS A5000 using Tapatalk
Just restart your phone and all works fine again...
If your fingerprint unlock still doesn't work I would try stock OOS instead of xXx No Limits and see if you still have the issue. I found that ROM extremely buggy both times I tried to run it and the other stock based ROM I tried (Freedom) really wasn't much better.
okey I fixed it by wiping cache and dalvik
thanks for your answers