I did some testing. I am seeing two different behaviors:
1) "Normal" behavior: when the phone is locked/unlocked, the viewfinder shows
black for ~1 second and then switches back to live viewfinder mode. This is
expected, as the camera-app has to release the camera backend when it becomes
inactive (either from moving to the background or locking the phone) such that
other apps using the camera will have it available. Only one client connection
at a time is allowed and this how Android subsystem we are using is designed.
2) Abnormal behavior: hard to reproduce, but sometimes after lock/unlock
the viewfinder shows a frozen image of the previous preview for
~5seconds, then switches to black screen, then to a live viewfinder.
Cannot always reproduce this but assuming this is the bug that has been
reported.
@victor
Can you confirm that 2) is the case that is being reported?
** Changed in: camera-app
Status: New => In Progress
** Also affects: qtubuntu-camera (Ubuntu)
Importance: Undecided
Status: New
** Also affects: qtubuntu-camera (Ubuntu RTM)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1398436
Title:
Preview frozen after unlocking
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