Comment 17 for bug 1363112

I can confirm that QStandardPaths::writableLocation() is the main cause this and bug #1359831 is happening. The method checks whether the path specified is writable, and returns an empty string if cannot chmod +w on the path. The log we captured yesterday was not visible so far, therefore we diid not suspected that. Previous tests with the branch were working on device with any arbitrary sample app.

Adding some logs to StateSaver resulted in the following:
QStandardPaths: wrong permissions on runtime directory /run/user/32011
[StateSaver] PATH "/com.ubuntu.camera/statesaver.appstate"

Which means that the state file was about to be created in the root folder due to QStandardPaths::writableLocation() returned empty string.