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[Q] Front facing camera not working on Android M

Hello,
I installed the developer preview as soon as it came out. Today I noticed my front facing camera is not working. It was working 3 days ago. In the stock camera app, the button to switch to front facing is not present. I installed a couple of other apps and there is no option for the front facing camera there too. So I tried to wipe the stock camera app's data. After that, the app does not start at all, it just crashes. 3rd party apps still work, but just for the rear camera.
I tried to reflash the system image for android m, but still, the problem persists. I happen to have a spare front facing camera from another broken nexus 5 (RIP old friend), and I still have this issue. Anyone got any ideas?

Stock Marshmallow - Torch & Camera not working

Hi everyone,
I have a Nexus 5, which is completely stock with locked bootloader. I am running the latest Android 6.0 with the Nov 2015 security patch.
I noticed a couple of days ago that my torch had stopped working. Also when I try the camera I get the 'Can't connect to the camera' error.
I tried clearing app cache for camera app, and this did not work
I tried clearing all cache through settings, and this did not work
I rebooted, and this did not work
I tried a 3rd party torch app, and this did not work (uninstalled)
I tried a 3rd party camera app, and this did not work (front camera briefly worked but then also errored if I tried to take a pic. Uninstalled)
I tried safe mode, in case it was a third party app causing the issue, and this did not work
I then tried wiping cache through recovery, and this did work, but only for a short time - after an hour the issue returned.
Sometime just after rebooting and then starting the camera app I get a garbled view instead of the error (screenshot attached) and can briefly switch to the front camera, but if I take a pic it errors again.
Has anyone got any idea as to what could be causing the issues?
Thanks!

Camera Failed

So a few weeks after I got the phone I started getting the camera failed message. I've tried every option I've had, clearing the cache, force stopping, removing the sd card, turning off smart stay, even hard resetting the phone and using the complete data cache wipe. Finally I took the phone to samsung and they did their software update/data fix thing and it worked. For about 10 minutes my camera was just fine. Then the error came again, but not as often. I would get the error once then right after the camera would work. So for most of the day everything was just fine. However, then towards the end of the day, it's gone back to how it was before with all error with almost no successful camera app use. I had shown it to samsung again and they were just stumped. They said to try a complete wipe, but I've already done that with no success.
I bring this up because I can't find any recent threads on this issue. Also from what I've seen it's a software issue so do I just wait for a fix for RMA the phone. Everything else about it works fine. Does anyone else have this issue?

Warning: "Camera failed" imposible to solve but dialing *#0*# the camera works
Hi, I have a problem with my front camera in the Galaxy S7 (SM-G930F). It doesn't work and every time that I enter in the front camera appears the message "Warning: Camera failed"
The Rear camera works perfectly but since I've bought the S7 I never couldn't use the front camera
Here is what I have tried:
- Force Stop, Clear Data, Clear Cache, and Clear Defaults
- Clear Cache Partition in Recovery
- Factory Reset through Settings
- Factory Reset through Recovery
- Installed 3rd party camera app
- Installed another OEM ROM through Odin
- Repite everything
And the camera never work.
But.... by entering *#0*# into the dialer and picking Front cam the camera works perfectly and I can take a pictures. but through the app it doesn't work
Another thing that I can do it is, install the Dual-camera MODE and I can use the both two cameras at the same time although the front camera locks very blurry but it is another problem
I need to know if it is a hardware problem or a softwared problem. I don't know if I replace the front camera It will work.

Hi! I have this problem with my front camera I tried every option too and also install another Oficial ROM through odin but it didn't work
Did you solve it?
Try to put *#0*# in the dialer and test the camera. tell me if it works.

Change default camera to rear facing instead of front facing

Hi guys,
After the Nougat 7.1.1 update, my front camera seems to have stopped working. At first, when I'm opening the camera app, it says that the application might be in use by other applications so I forced close it, clear data, and even restarted the phone. But none if it did work, however, when I'm opening 3rd party camera applications it shows up fine but no option of changing to front facing.
I would like to ask if there's a line of code so I can change the initial startup of the camera to rear? I knew that my front facing camera is not working when I tried to check the diagnostics and it says that it doesn't support this function. Hope you guys help me out with this one. Thanks guys

Camera problem

hey everyone,
a few days ago my camera app stoped working and so is my flashlight.
i tried to unistall the app and update it but it didnt work
then i did a factory reset but the app is still off
its probably a problem with the rear camera because the front camera works fine in selfie on whatsapp
Did any of you get a problem like this?