Digikam permission problem

znerd · n00b Joined: 05 May 2004 Posts: 10 Location: Netherlands

I have a weird problem. When I start Digikam as a normal user, I cannot access my camera. Then when I login as root, I can.

This is the error I get:
"Failed to connect to camera. Please make sure its connected properly and turned on. Would you like to try again?"

I tried debugging with strace but I did not seem to get a lot of useful info. I did see some "Resource unavailable" errors and some time-outs, but I'm not sure they're related.

Background info:
- Linux 2.6.11;
- emerged world with ACCEPT_KEYWORDS=~x86 yesterday morning (do it almost every day);
- Digikam 0.7.2 on KDE 3.4.0;

This is the section in my /proc/bus/usb/devices:

T: Bus=05 Lev=01 Prnt=01 Port=01 Cnt=01 Dev#= 7 Spd=12 MxCh= 0
D: Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=32 #Cfgs= 1
P: Vendor=04a9 ProdID=3074 Rev= 0.01
S: Manufacturer=Canon Inc.
S: Product=Canon Digital Camera
C:* #Ifs= 1 Cfg#= 1 Atr=c0 MxPwr=100mA
I: If#= 0 Alt= 0 #EPs= 3 Cls=06(still) Sub=01 Prot=01 Driver=(none)
E: Ad=81(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms
E: Ad=02(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms
E: Ad=83(I) Atr=03(Int.) MxPS= 8 Ivl=96ms

$ ls -l /dev/usb
total 0
crw-rw---- 1 root lp 180, 0 Jan 1 1970 lp0

I would expect to see something for my camera there as well?

This is my system name:

$ uname -a
Linux whisperer 2.6.11-gentoo-r4 #3 SMP Sat Mar 26 20:26:12 CET 2005 i686 Intel(R) Pentium(R) 4 CPU 2.80GHz GenuineIntel GNU/Linux

Then this is the result of emerge info:

$ emerge info
Portage 2.0.51.20-r4 (default-linux/x86/2005.0, gcc-3.3.4, glibc-2.3.5-r0, 2.6.11-gentoo-r4 i686)
=================================================================
System uname: 2.6.11-gentoo-r4 i686 Intel(R) Pentium(R) 4 CPU 2.80GHz
Gentoo Base System version 1.6.11
distcc 2.18.3 i686-pc-linux-gnu (protocols 1 and 2) (default port 3632) [disabled]
dev-lang/python: 2.3.5
sys-devel/autoconf: 2.13, 2.59-r6
sys-devel/automake: 1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.5
sys-devel/binutils: 2.15.92.0.2-r8
sys-devel/libtool: 1.5.14
virtual/os-headers: 2.6.11
ACCEPT_KEYWORDS="x86"
AUTOCLEAN="yes"
CBUILD="i686-pc-linux-gnu"
CFLAGS="-O2 -march=pentium4"
CHOST="i686-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/kde/2/share/config /usr/kde/3.2/share/config /usr/kde/3.3/env /usr/kde/3.3/share/config /usr/kde/3.3/shutdown /usr/kde/3.4/env /usr/kde/3.4/share/config /usr/kde/3.4/shutdown /usr/kde/3/share/config /usr/lib/X11/xkb /usr/lib/mozilla/defaults/pref /usr/share/config /var/qmail/control"
CONFIG_PROTECT_MASK="/etc/gconf /etc/terminfo /etc/env.d"
CXXFLAGS="-O2 -march=pentium4"
DISTDIR="/usr/portage/distfiles"
FEATURES="autoconfig distlocks sandbox sfperms strict"
GENTOO_MIRRORS="http://ftp.easynet.nl/mirror/gentoo/ ftp://ftp.easynet.nl/mirror/gentoo/ http://ftp.snt.utwente.nl/pub/os/linux/gentoo ftp://ftp.snt.utwente.nl/pub/os/linux/gentoo http://vlaai.snt.ipv6.utwente.nl/pub/os/linux/gentoo/ ftp://mirror.nutsmaas.nl/gentoo/"
LINGUAS="en nl"
MAKEOPTS="-j3"
PKGDIR="/usr/portage/packages"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
SYNC="rsync://rsync.gentoo.org/gentoo-portage"
USE="x86 X aalib alsa apm arts avi berkdb bitmap-fonts cdr crypt cups curl debug directfb divx4linux dvd dvdr emboss encode esd fam fbdev flac foomaticdb fortran gdbm gif gphoto2 gpm gtk2 imagemagick imlib java javamail jpeg junit kde kdeenablefinal libg++ libwww live mad mikmod mmx motif mozilla moznocompose moznoirc moznomail mp3 mpeg nas ncurses network nls ogg oggvorbis opengl oss pam pdflib perl png ppds python qt quicktime readline rtc slang speex spell sse ssl tcltk tcpd tiff truetype truetype-fonts type1-fonts usb vorbis xine xinerama xml xml2 xmms xv zlib linguas_en linguas_nl"
Unset: ASFLAGS, CTARGET, LANG, LC_ALL, LDFLAGS, PORTDIR_OVERLAY

Possible causes:
- this may have to do with a recent upgrade I did, via emerge;
- it seems related to devfs (no, I'm not switching to udev yet);

Any ideas?

yaneurabeya · Posted: Wed Apr 27, 2005 6:09 am Post subject:

Sounds like permissions issues on the /dev node. Check the usb node for the camera and modify it accordingly (ie 0777 or something similar).

Unplug your camera, replug it and check dmesg. If your camera was detected it will display the node it mapped the camera to.
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znerd · n00b Joined: 05 May 2004 Posts: 10 Location: Netherlands

This is what shows up in my dmesg:

pesche · Posted: Wed May 18, 2005 2:10 pm Post subject:

If your using your camera in PTP mode have a look at this thread http://forums.gentoo.org/viewtopic-p-2420056.html#2420056
I had the same problem with my camera using the original script in /etc/hotplug/usb.

Greetings,
Pesche.
_________________
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Albert Einstein (1879 - 1955)

Decibels · Veteran Joined: 16 Aug 2002 Posts: 1542 Location: U.S.A.

It's the stupid PAM. Seems like every other month or so it screws up my camera for user.
Going to have to look further into doing away with PAM off my box.
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Don't assume malice for what stupidity can explain.
Always remember you're unique. Just like everyone else.
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Headrush · Posted: Thu Jul 14, 2005 2:36 am Post subject:

Bendt · n00b Joined: 14 Jul 2005 Posts: 15 Location: Denmark

After trying the things recomended in this thread, without succes, I simply added myself to the usb-group in /etc/group - that did the trick. But I wonder if I screwed up something else??

Headrush · Posted: Thu Jul 14, 2005 11:04 pm Post subject:

j_c_p · Posted: Thu Jul 14, 2005 11:14 pm Post subject:

The answer of this thread was done in the following topic thread by evoweiss (works well for me) : http://forums.gentoo.org/viewtopic-t-357214-highlight-digikam.html?sid=a0608b41436ec3942cb325d33d9d1947

bedo · n00b Joined: 11 May 2004 Posts: 56

quick note:

it's better to use gpasswd to add user to group

Decibels · Veteran Joined: 16 Aug 2002 Posts: 1542 Location: U.S.A.