Re: [gphoto-devel] Problem with capture-and-download, capture-preview on Canon G6

[Marcus M. <ma...@je...>]

On Tue, Nov 24, 2009 at 03:25:52PM -0800, bjordan555 wrote:
> 
> 
> 
> > 
> > I have added recovery technology after 2.4.7, which you can test.
> > This should handle the sequence errors I hope.
> > 
> > http://www.lst.de/~mm/libgphoto2-2.4.7.3.tar.bz2
> > 
> > If not, please post another debugtrace. :)
> > 
> > 
> 
> I've upgraded to libgphoto2-2.4.7.3 as instructed.  My success is still
> intermittent. I have been able to get --capture-image-and-download to work
> once, but never twice in a row.  It always works the first time after a
> power cycle and reconnect.  The second one fails.   
> 
> More notes: --capture-preview works intermittently, some times several times
> in a row, before failing.  --auto-detect, --summary both work, most of the
> time.  Thus, it's also worth noting that the camera behaviour is a bit
> strange.  After executing these commands, the camera locks up, and requires
> a power cycle in order to be recognised and used again.  The LCD output on
> the top of the camera is also worth noting:  After power cycling, without
> the USB connected, it contains the usual information, including images left,
> the mode, etc.  When I connect the USB, it changes to "Pb", and the light is
> green.  After executing a command, even a --summary, the light turns orange,
> and the LCD indicates "PC". If I run --capture-image-and-download or
> --capture-preview, and it is unsuccessful, the camera requires a power
> cycle, and then it comes up with "Pb" and the LCD, even without the LCD
> connected.  I have to press the button to take a picture to snap it out of
> this mode.  Also, I sometimes have to run a --auto-detect to get the camera
> to wake up. Odd. I'm hoping the camera is fine, but I wanted to include
> these symptoms for further diagnosis. 

strange. :/

> 1) The logs from successful (
> http://old.nabble.com/file/p26505136/capture-image-and-download.txt
> capture-image-and-download.txt  ) and then subsequently failed (
> http://old.nabble.com/file/p26505136/capture-image-and-download2.txt
> capture-image-and-download2.txt ) --capture-image-and-download are attached. 
> Note that trimmed the first one to remove the image content, and I had to
> kill the second one, and the log up until that is what you see. 
> 
> 2) I'm going to try a different USB cable, just in case, and retest.
> 
> 3) I've reset the camera to factory defaults to ensure a clean state.
> 
> 4) The camera is being detected in PTP mode?  Is this correct?  Should it be
> normal mode?

PTP mode is correct, Normal mode is worse ;)
 
> Thanks for the continued support. 

Could you try editing libgphoto2/camlibs/ptp2/library.c
and in this line:

        {"Canon:Powershot G6 (PTP mode)",       0x04a9, 0x30b3, PTPBUG_DELETE_SENDS_EVENT|PTP_CAP|PTP_CAP_PREVIEW},
remove the "PTPBUG_DELETE_SENDS_EVENT|" part? 

It seems the camera does not send events and this might confuse the protocol stack :/

Ciao, Marcus