Bug 371197 – net-print/cups-1.4.6-r21 - backend hp.c 745: ERROR: open device failed stat=12: hp:/usb/HP

• Status: RESOLVED FIXED
• Product: Gentoo Linux

[Description far jump 2011-06-12 04:40:47 UTC]

Brand new system, clean simple Gentoo install (no GUI).  install cups, hplip
connect a (known to be working) HP laserjet and run hp-setup

This replaced an older existing server with multiple USB devices and custom designed hardware and software.  Everything works except this printer.

Reproducible: Always

Steps to Reproduce:
1. Install cups
2. connect printer
3. print test page
Actual Results:  
>grep backend /var/log/cups/error_log
D [11/Jun/2011:23:31:09 -0400] [Job 27] Printer stopped due to backend errors; please consult the error_log file for details.
D [11/Jun/2011:23:46:04 -0400] [Job 30] Started backend /usr/libexec/cups/backend/hp (PID 2362)

>grep -C1 backend /var/log/messages 
Jun 10 20:35:31 barad-dur_II hp[5419]: io/hpmud/musb.c 1125: unable to open hp:/usb/HP_Color_LaserJet_CP1518ni?serial=00CND0400699
Jun 10 20:35:31 barad-dur_II hp[5419]: prnt/backend/hp.c 745: ERROR: open device failed stat=12: hp:/usb/HP_Color_LaserJet_CP1518ni?serial=00CND0400699


Expected Results:  
the printer should print :)

Portage 2.1.9.42 (default/linux/amd64/10.0, gcc-4.4.5, libc-0-r0, 2.6.39-gentoo-r1 x86_64)
=================================================================
System uname: Linux-2.6.39-gentoo-r1-x86_64-AMD_Phenom-tm-_II_X4_965_Processor-with-gentoo-2.0.2
Timestamp of tree: Sat, 11 Jun 2011 22:30:01 +0000
ccache version 2.4 [enabled]
app-shells/bash:     4.1_p9
dev-java/java-config: 2.1.11-r3
dev-lang/python:     2.7.1-r1, 3.1.3-r1
dev-util/ccache:     2.4-r9
dev-util/cmake:      2.8.4-r1
sys-apps/baselayout: 2.0.2
sys-apps/openrc:     0.8.2-r1
sys-apps/sandbox:    2.4
sys-devel/autoconf:  2.65-r1
sys-devel/automake:  1.11.1
sys-devel/binutils:  2.20.1-r1
sys-devel/gcc:       4.4.5
sys-devel/gcc-config: 1.4.1-r1
sys-devel/libtool:   2.2.10
sys-devel/make:      3.82
sys-kernel/linux-headers: 2.6.36.1
sys-libs/glibc:      2.12.2
virtual/os-headers:  0
ACCEPT_KEYWORDS="amd64"
ACCEPT_LICENSE="*"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-O3 -pipe"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc"
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/env.d/java/ /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo"
CXXFLAGS="-O3 -pipe"
DISTDIR="/usr/portage/distfiles"
FEATURES="assume-digests binpkg-logs ccache distlocks fixlafiles fixpackages news parallel-fetch protect-owned sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch"
FFLAGS=""
GENTOO_MIRRORS="http://distfiles.gentoo.org"
LDFLAGS="-Wl,-O1 -Wl,--as-needed"
MAKEOPTS="-j5"
PKGDIR="/usr/portage/packages"
PORTAGE_CONFIGROOT="/"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress --force --whole-file --delete --stats --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
SYNC="rsync://rsync.gentoo.org/gentoo-portage"
USE="X a52 acl alsa amd64 avi berkdb bzip2 cdrw cli cracklib crypt cups cxx dbus divx4linux dri dts dv dvd dvdread dvdrw encode fame fortran gdbm gif gpm gtk hpijs iconv imlib ipv6 java jpeg jpg ldap live matroska mmx modules mp4 mpeg mudflap multilib ncurses nls nptl nptlonly ogg oggvorbis openmp pam pcre pdf perl png ppds pppd python qt3 readline realmedia session sse sse2 ssl static-libs subtitles svg sysfs tcpd theora truetype udev ukit unicode usb vorbis wmp x264 xanim xine xorg xvid zlib" ALSA_CARDS="ati" ALSA_PCM_PLUGINS="adpcm alaw asym copy dmix dshare dsnoop empty extplug file hooks iec958 ioplug ladspa lfloat linear meter mmap_emul mulaw multi null plug rate route share shm softvol" APACHE2_MODULES="actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" CALLIGRA_FEATURES="braindump flow karbon kexi kpresenter krita tables words" CAMERAS="ptp2" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf superstar2 timing tsip tripmate tnt ubx" INPUT_DEVICES="keyboard mouse" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" PHP_TARGETS="php5-3" RUBY_TARGETS="ruby18" USERLAND="GNU" VIDEO_CARDS="vesa ati fbdev" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipset ipp2p iface geoip fuzzy condition tee tarpit sysrq steal rawnat logmark ipmark dhcpmac delude chaos account" 
Unset:  CPPFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LANG, LC_ALL, LINGUAS, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, PORTDIR_OVERLAY

[Comment 1 far jump 2011-06-12 04:51:12 UTC]

I believe this is a permissions problem.  I enabled usb printer in kernel and configured cups as: deviceURL: parallel:/dev/usb/lp0.  At first I got the same kind of error (/usr/libexec/cups/backend/parallel failed).  But, then I changed permissions on /dev/usb/lp0

chmod 666 /dev/usb/lp0

now it works perfectly.  serves as local and network printer.  Of course,if we install another printer we could have printer port confusion if printer are not powered up in proper order.  which is why hplip is nice, assigning printers by their serial number.

[Comment 2 Jeroen Roovers (RETIRED) 2011-06-13 21:02:20 UTC]

Please post the output of `emerge -vpq net-print/cups' too.

[Comment 3 far jump 2011-06-13 21:52:28 UTC]

>emerge -vpq net-print/cups
[ebuild   R   ] net-print/cups-1.4.6-r21  USE="X acl dbus gnutls java jpeg ldap pam perl png python samba slp ssl static-libs threads tiff -debug -kerberos -php -usb* -xinetd" LINGUAS="-da -de -es -eu -fi -fr -id -it -ja -ko -nl -no -pl -pt -pt_BR -ru -sv -zh -zh_TW"

[Comment 4 Andreas K. Hüttel 2012-04-12 23:46:10 UTC]

Is this still a problem with current cups-1.5?

[Comment 5 far jump 2012-04-13 01:13:07 UTC]

(In reply to comment #4)
> Is this still a problem with current cups-1.5?

Nope!

[Comment 6 Andreas K. Hüttel 2012-04-14 01:02:01 UTC]

(In reply to comment #5)
> (In reply to comment #4)
> > Is this still a problem with current cups-1.5?
> 
> Nope!

Excellent, thanks!