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List:       gphoto-devel
Subject:    Re: [gphoto-devel] Canon PowerShot Pro90 IS help?
From:       Warren Baird <wjbaird () bigfoot ! com>
Date:       2001-04-22 22:29:32
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On 22 Apr 2001 11:45:46 +0200, Philippe Marzouk wrote:
> Le jeu, 19 avr 2001 16:53:17, Warren Baird a écrit :
> >
> > If you haven't already, try transferring pics just using the battery -
> > that should work.
> > 
> 
> We may be able to avoid this problem by comparing with the USB product ID
> and not the model string. Maybe there is a slight difference between the
> model string returned when not on battery.

Unfortunately I don't think it'll be that easy - I've spent some time
mucking about in gdb to figure out what is going on, and the identity
string that the USB protocol is returning is blank...  I haven't dug
deep enough yet to figure out why...   But it certainly isn't as easy as
a different ident string being returned when plugged in...

I tried hard-wiring the identity string, in case it was *only* the ident
string that was broken, and I got the messages:

canon: check_readiness()
canon: dir_tree()
gp_port: gp_port_usb_msg_write: msg_write error
Status: Could not obtain directory listing
gPhoto2 reported the error 'Unspecified error'

instead...   So it looks like the problem runs a little deeper - I
haven't had time to dig any deeper into it...


> Moreover this would simplify adding new cameras: simply add the product ID
> and there you go.

sounds like it might be a good modification even if it doesn't fix this
problem...

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