Arch Linux

gareththered

Member

From: West Yorkshire, UK

Registered: 2014-02-12

Posts: 6

[Solved] gphoto2 only works as root

I've used gphoto2 for years on other distros and it works fine as a normal user.  However, when I try this on Arch it fails with:-

gphoto2 --capture-image-and-download
                                                                               
*** Error ***              
An error occurred in the io-library ('I/O problem'): No error description available
ERROR: Could not capture image.
ERROR: Could not capture.

*** Error ***              
An error occurred in the io-library ('I/O problem'): No error description available

and running it with '--debug' produces:

0.017569 libusb1(2): gp_port_usb_open()
0.017580 libusb1(0): libusb_open returned -3
0.017603 context(0): An error occurred in the io-library ('I/O problem'): No error description available

*** Error ***              
An error occurred in the io-library ('I/O problem'): No error description available
ERROR: Could not capture image.
ERROR: Could not capture.

I have noticed that it works when I run it as root.  The wiki suggests that I placed the normal user in the 'storage' group, but that didn't help me out.  I've noticed a few older posts in this forum on this subject, but they mention consoleKit, which is obsolete as far as I understand.  Does anyone have any idea where I go next?

I'm running gphoto 2.5.3.1-1 and libusb 1.0.18-1

Last edited by gareththered (2014-02-24 16:45:12)

ewaller

Administrator

From: Pasadena, CA

Registered: 2009-07-13

Posts: 20,722

Re: [Solved] gphoto2 only works as root

As a sanity check, after you added the user to the starage group, that user did log out, then log back in. Right?

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gareththered

Member

From: West Yorkshire, UK

Registered: 2014-02-12

Posts: 6

Re: [Solved] gphoto2 only works as root

Yes - I did log off.  In fact, I've probably rebooted a few times too as I'm comparing Arch with a Fedora 20 installation to see if there are any glaring differences.  It all seems similar though :-(  I'm thinking along the lines of udev or polkit at the moment, but as I don't really understand these it means I'll need to do some reading up in order to get this resolved.

Scimmia

Fellow

Registered: 2012-09-01

Posts: 13,729

Re: [Solved] gphoto2 only works as root

Possible related bug report: https://bugs.archlinux.org/task/39024

gareththered

Member

From: West Yorkshire, UK

Registered: 2014-02-12

Posts: 6

Re: [Solved] gphoto2 only works as root

Scimmia - you're a genius ;-)

As root, I changed the extension:-

mv /usr/lib/udev/hwdb.d/20-gphoto.conf /usr/lib/udev/hwdb.d/20-gphoto.hwdb

and ran:-

udevadm hwdb --update

After reconnecting the camera it worked as a normal user.