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<?xml version='1.0' ?>
<!-- =================================================================
About this file:
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you can do syntax checks
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http://docbook.org/ and http://nwalsh.com/
- We use Tim Waugh's xmlto to process this file within the build
system, but you're free to use any other adequate processing tool,
of course :-)
================================================================= -->
<?xml-stylesheet type="text/css" href="docbook-xml.css"?>
<!--
leave DOCTYPE commented out for easy inclusion as external entity
-->
<!-- DOCTYPE qandaset PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"
"http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd" -->
<qandaset>
<qandaentry>
<question>
<simpara>What can I do about the error message "Could not find USB device"?</simpara>
</question>
<answer>
<para>
The exact error message looks like
</para>
<screen>
Could not find USB device (vendor 0x0000, product 0x0000). Make
sure this device is connected to the computer
</screen>
<para>
You have to set up the permissions on your USB device correctly.
This is described in The gPhoto2 Manual, which is available at
<ulink url="http://n-dimensional.de/projects/digicam/The_gPhoto2_Manual/">http://n-dimensional.de/projects/digicam/The_gPhoto2_Manual/</ulink>.
See especially the section "Setting up permissions for USB ports".
</para>
</answer>
</qandaentry>
<qandaentry>
<question>
<simpara>gphoto2 does not find my camera. What shall I do?</simpara>
</question>
<answer>
<para>
First try to run "gphoto2 --list-ports" and look whether the ports
you want to use are listed there:
</para>
<itemizedlist>
<listitem>
<simpara>
For serial devices, the port with the appropriate device must be
listed
</simpara>
</listitem>
<listitem>
<simpara>
For USB devices, you need the "usb:" port in the list. If you
don't see it, check whether you compiled gphoto2 with libusb
support.
</simpara>
</listitem>
</itemizedlist>
<para>
Then try to run "gphoto2 --auto-detect" and look whether the camera
is detected.
</para>
<para>
If your gphoto2 cannot access the USB device as non-root users, you
have to set up hotplugging correctly. See FIXME for details.
</para>
<para>
AND DO NOT RUN gphoto2 AS ROOT. And no other libgphoto2 frontend either.
</para>
</answer>
</qandaentry>
<qandaentry>
<question>
<simpara>Why do I get the error message "Could not claim the USB device"?</simpara>
</question>
<answer>
<para>
The exact message looks like
</para>
<screen>
*** Error ('Could not claim the USB device') ***
Could not claim interface 0 (Operation not permitted). Make sure no
other program or kernel module (e.g. dc2xx or stv680) is using the
device and you have read/write access to the device.
</screen>
<para>
You have to make sure that no such kernel module is loaded and that
you have set up the permissions on your USB device correctly,
such that you have (non-root) write access to the camera device.
How to set this up, is described at FIXME.
</para>
</answer>
</qandaentry>
<qandaentry>
<question>
<simpara>
Why does my Canon PowerShot G1/Pro 90 IS not work with gphoto2
when using the AC adapter?
</simpara>
</question>
<answer>
<para>
This is a longstanding bug which we cannot fix since none of
the active gphoto2 developers own one of these cameras. Your
options are as follows, in descending order of preference:
</para>
<itemizedlist>
<listitem>
<simpara>
Fix it and send us a patch.
</simpara>
</listitem>
<listitem>
<simpara>Donate a G1 to one of the active Canon driver
developers.</simpara>
</listitem>
<listitem>
<simpara>Run the camera on battery instead of the AC adapter.</simpara>
</listitem>
</itemizedlist>
<para>
There is some more info regarding this at
<ulink url="http://krixor.xy.org/fredrik/gp/canon-g1-ac-problem/">http://krixor.xy.org/fredrik/gp/canon-g1-ac-problem/</ulink>.
Good luck.
</para>
</answer>
</qandaentry>
<qandaentry>
<question>
<simpara>I've got a serial camera, but gphoto2 doesn't work on SuSE 7.0
(or greater). You told me that my camera is supported! Fix
it!</simpara>
</question>
<answer>
<para>
Cool down, Joe, and listen to the wise words of Linda
MacPhee-Cobb:
</para>
<para>
<citation>
If you are not getting a response from a camera plugged into
the serial port, check your /var/log/boot.msg file for the
following entry near the end:
</citation>
<screen>
*This package use the ttyS0 device by default.
The installation of this package only makes sense
if you use a braille display.
</screen>
<citation>
This is from blinx, and you will need to turn it off,
or better, uninstall it.
</citation>
</para>
</answer>
</qandaentry>
<qandaentry>
<question>
<simpara>Dudes, Windows is the way to go. How do I compile
gphoto2 for that environment?</simpara>
</question>
<answer>
<para>
We don't have the money to buy Windows and something like Visual C.
Therefore, we can't provide you a gphoto2 for Windows. You have two
choices (at least):
</para>
<itemizedlist>
<listitem>
<simpara>
Buy a fast computer, buy Windows and Visual C and some manuals on
how to access USB or serial ports on Windows. Send all that
including a blank cheque to us (ask for the address on
gphoto-devel@gphoto.org).
</simpara>
</listitem>
<listitem>
<simpara>
Try to figure out how to get gphoto2 working on Windows
and send us the patches.
</simpara>
</listitem>
</itemizedlist>
</answer>
</qandaentry>
<qandaentry>
<question>
<simpara>I wanna have CVS write access. How do I get one?</simpara>
</question>
<answer>
<simpara>
We provide CVS write access to persons that show
<emphasis>continued</emphasis> interest in a
<emphasis>specific part</emphasis>
of gphoto2.
If there is already a person maintaining this
specific part of gphoto2 (i.e. a camera driver), we prefer you
submit patches to the maintainer who will then check them in
or request modifications.
</simpara>
</answer>
</qandaentry>
<qandaentry>
<question>
<simpara>You took away my CVS write access! What did I do
wrong?</simpara>
</question>
<answer>
<para>
If your name is not listed in gphoto2/MAINTAINERS, and if we
haven't heard from you lately, we assume that you finished
your work on gphoto2 and that you don't need write access any
longer. If this is not the case, please contact one of the
project admins.
</para>
</answer>
</qandaentry>
</qandaset>
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