[Discuss] error with gphoto2 and Canon PowerShot A540 camera

[Larry Gagnon]

Am attempting to use my Canon PowerShot A540 digital camera with either 
gtkam or gphoto2 under VectorLinux v5.8. With gtkam the camera is 
detected properly and I am able to see the files on the camera's memory 
card. However, when I try to view any file or see thumbnails the program 
hangs.

Using gphoto2 from the command line and the command "gphoto2 --debug -L" 
to list the files throws the error:

"PTP I/O error
24.020239 gphoto2-port(2): Closing port...
24.023918 context(0): An error occurred in the io-library ('Unspecified 
error'): Could not query kernel driver of device."

I have the latest libgphoto2 libraries which, according to their 
website, support this camera. I also have the correct udev rules for 
this camera and have checked that with lsusb. The problem is obviously 
not with camera detection. From the above error I suspect libgphoto2 but 
I could be wrong. Any ideas greatly appreciated..

Larry Gagnon