Xperia Z3 Compact camera error when starting from locked screen (symbol lock)

[Huma22]

Hi

I'm a new owner of Xperia Z3 Compact and I have noticed a problem when launching camera. The app itself works perfectly well but when trying to launch camera from locked phone (screen locked with symbol) it shows only black screen with error message that camera app it unaccessible. After removing lock screen protection both camera symbol on lock screen and dedicated camera button works as intended. Is it supposed to be that way? On my previous phone I could launch camera app without unlocking screen but couldn't access any other parts of the phone. I'd love to have it working the same way here especially with the dedicated camera button.

Hoping for a fast answer. 

Regards

Huma

[_alexdon_]

Try settings-apps-all-camera,force stop and clear data.Restart and check again.

[Huma22]

@alexdon: Tried that already (few times) with no effect.

[_alexdon_]

Do you have any task killers? Check if the same occurs in safe mode:

http://talk.sonymobile.com/t5/FAQ/How-to-boot-your-phone-into-safe-mode/m-p/348008

[Huma22]

Yes I'm using a task killer (Clean Master) but I have checked the camera after uninstalling it (and rebooting) but nothing changed. I also checked the safe mode You suggested and it worked. In safe mode camera is working as intended. Now my problem is how to identify the problematic app. Any easy way for that, as checking them one by one will take forever. I already uninstalled some apps that I know off they use camera but with no effect.

[_alexdon_]

Antivirus? Battery saver? Maybe some camera enhancements?

[Huma22]

No antivirus, no battery saver. Camera enhancements - only those automaticly installed on the phone from Sony. I basicly only use apps from big developers like Facebook, Instagram, Twitter, Feedly, Pocket etc. No weird 3rd party apps doing nothing.

[_alexdon_]

So now back in normal mode still having issues? 

[Huma22]

Unfortunatelly yes. It works fine in safe mode. After rebooting to normal problem appears instantaneous.

[_alexdon_]

You may need to perform a software repair using PC Companion.The process will erase all internal memory.You might need to charge your device for about 1-2 hours before so the device has at least 60% battery.

Make sure the device is not connected to computer or laptop and turned off (sometimes you have to press power button and volume up until the device vibrates 3 times or on some devices you have to press the small button near the SIM tray or on the back of the device).

Open PC companion->support zone->phone/tablet software update->repair my phone/tablet blue highlighted.Follow the steps given,do not connect your phone until prompted to press volume down while plugging USB cable. If PC companion does not start the repair process, you might need to run it in compatibility mode with Windows 7 (in some cases XP).