When sane_start() fails, we still get the following trace:
sane_start()
Sane: scan_start() OK
See https://gitlab.gnome.org/World/OpenPaperwork/libinsane/blob/b761b5e84471a6f1f6fa3abce388494ab966b6b5/subprojects/libinsane/src/bases/sane.c#L1128