<commit_before><commit_msg>src: troubleshooting notes for canon cams<commit_after>- no widget found exception?
	- verify that the camera mode selection wheel is on manual, otherwise e.g.
	  shutter speed cannot be changed
- camera ui (buttons, remote shutter) stuck after changing things?
	- run release-uilock.sh or replug usb or reboot cams
- ui unlocked and still black screen?
	- push info button twice to cycle it back to the normal mode
- camera not saving pics on the memory card?
	- the capture target was internal ram, set back to memory card
	- gphoto2 --set-config capturetarget=1
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