This is absolutely strange, 755 and 777 should not make any difference for CUPS, as with both the parallel backend can be run as normal user and that is what CUPS does with these permissions. With 700 it can be only run as root and than CUPS runs it as root. And seeing your tests the parallel backend works as root but not as normal user for you. Are you sure that your parallel backend had 755 permissions before?
I had the HP DeskJet 840C years ago and AFAIK it was not parallel-only. It had an USB port. So you should be able to connect your printer with a USB cable (do not use a USB->Parallel adapter if your next PC has no parallel port, these adapters are REALLY BAD). -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to cups in Ubuntu. https://bugs.launchpad.net/bugs/1307221 Title: CUPS does not see parallel printer Status in “cups” package in Ubuntu: Incomplete Bug description: Installed Ubuntu 12.04 LTS 32 bit today. It does not see a parallel printer. USB printer attached is working fine. CUPS does not see parallel port, kernel does see Deskjet 840. Outputs from fault finding below. Any help appreciated. Output of lsmod | grep lp usblp 18377 0 lpc_ich 16987 0 lp 13359 0 parport 40930 3 ppdev,parport_pc,lp Output of lsmod | grep ppdev ppdev 17423 0 parport 40930 3 ppdev,parport_pc,lp Output of lsmod | grep parport_pc parport_pc 32114 1 parport 40930 3 ppdev,parport_pc,lp Output of dmesg | grep par [ 0.000000] Booting paravirtualized kernel on bare hardware [ 0.097639] regulator-dummy: no parameters [ 0.131972] hpet0: 3 comparators, 64-bit 14.318180 MHz counter [ 0.881798] Asymmetric key parser 'x509' registered [ 14.401751] parport_pc 00:05: reported by Plug and Play ACPI [ 14.401814] parport0: PC-style at 0x378 (0x778), irq 7, dma 3 [PCSPP,TRISTATE,COMPAT,ECP,DMA] [ 14.527472] parport0: Printer, HEWLETT-PACKARD DESKJET 840C [ 14.576501] lp0: using parport0 (interrupt-driven). [ 15.352032] ppdev: user-space parallel port driver [ 17.078114] type=1400 audit(1397397215.289:2): apparmor="STATUS" operation="profile_load" parent=811 profile="unconfined" name="/sbin/dhclient" pid=828 comm="apparmor_parser" [ 17.078129] type=1400 audit(1397397215.289:3): apparmor="STATUS" operation="profile_load" parent=811 profile="unconfined" name="/usr/lib/NetworkManager/nm-dhcp-client.action" pid=828 comm="apparmor_parser" [ 17.078139] type=1400 audit(1397397215.289:4): apparmor="STATUS" operation="profile_load" parent=811 profile="unconfined" name="/usr/lib/connman/scripts/dhclient-script" pid=828 comm="apparmor_parser" [ 17.079023] type=1400 audit(1397397215.289:5): apparmor="STATUS" operation="profile_replace" parent=811 profile="unconfined" name="/usr/lib/NetworkManager/nm-dhcp-client.action" pid=828 comm="apparmor_parser" [ 17.079035] type=1400 audit(1397397215.289:6): apparmor="STATUS" operation="profile_replace" parent=811 profile="unconfined" name="/usr/lib/connman/scripts/dhclient-script" pid=828 comm="apparmor_parser" [ 17.079499] type=1400 audit(1397397215.289:7): apparmor="STATUS" operation="profile_replace" parent=811 profile="unconfined" name="/usr/lib/connman/scripts/dhclient-script" pid=828 comm="apparmor_parser" [ 17.080716] type=1400 audit(1397397215.293:8): apparmor="STATUS" operation="profile_replace" parent=808 profile="unconfined" name="/sbin/dhclient" pid=827 comm="apparmor_parser" [ 17.080728] type=1400 audit(1397397215.293:9): apparmor="STATUS" operation="profile_replace" parent=808 profile="unconfined" name="/usr/lib/NetworkManager/nm-dhcp-client.action" pid=827 comm="apparmor_parser" [ 17.080736] type=1400 audit(1397397215.293:10): apparmor="STATUS" operation="profile_replace" parent=808 profile="unconfined" name="/usr/lib/connman/scripts/dhclient-script" pid=827 comm="apparmor_parser" [ 17.081610] type=1400 audit(1397397215.293:11): apparmor="STATUS" operation="profile_replace" parent=808 profile="unconfined" name="/usr/lib/NetworkManager/nm-dhcp-client.action" pid=827 comm="apparmor_parser" [ 22.231417] type=1400 audit(1397397220.441:68): apparmor="STATUS" operation="profile_load" parent=995 profile="unconfined" name="/usr/sbin/tcpdump" pid=1031 comm="apparmor_parser" [ 72.077365] type=1400 audit(1397397270.291:69): apparmor="DENIED" operation="open" parent=1 profile="/usr/lib/telepathy/mission-control-5" name="/usr/share/gvfs/remote-volume-monitors/" pid=2220 comm="mission-control" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0 [ 108.062708] parport0: lp tried to release parport when not owner [ 108.062719] parport0: ppdev0 forgot to release port [ 155.670290] type=1400 audit(1397397353.882:70): apparmor="DENIED" operation="file_lock" parent=1 profile="/usr/sbin/cupsd" name="/run/samba/gencache.tdb" pid=917 comm="cupsd" requested_mask="k" denied_mask="k" fsuid=0 ouid=0 [ 155.801654] type=1400 audit(1397397354.014:71): apparmor="DENIED" operation="open" parent=1 profile="/usr/sbin/cupsd" name="/home/.ecryptfs/nick/.ecryptfs/Private.mnt" pid=917 comm="cupsd" requested_mask="r" denied_mask="r" fsuid=0 ouid=1000 [ 157.051581] type=1400 audit(1397397355.261:72): apparmor="DENIED" operation="open" parent=917 profile="/usr/sbin/cupsd" name="/home/.ecryptfs/nick/.ecryptfs/wrapped-passphrase" pid=2552 comm="cupsd" requested_mask="r" denied_mask="r" fsuid=1000 ouid=1000 [ 157.194704] parport0: lp already owner [ 251.732232] parport0: lp tried to release parport when not owner [ 251.732243] parport0: ppdev0 forgot to release port [ 385.148858] type=1400 audit(1397397583.363:73): apparmor="DENIED" operation="file_lock" parent=1 profile="/usr/sbin/cupsd" name="/run/samba/gencache.tdb" pid=917 comm="cupsd" requested_mask="k" denied_mask="k" fsuid=0 ouid=0 [ 385.250832] type=1400 audit(1397397583.463:74): apparmor="DENIED" operation="open" parent=1 profile="/usr/sbin/cupsd" name="/home/.ecryptfs/nick/.ecryptfs/Private.mnt" pid=917 comm="cupsd" requested_mask="r" denied_mask="r" fsuid=0 ouid=1000 [ 386.008039] type=1400 audit(1397397584.222:75): apparmor="DENIED" operation="open" parent=917 profile="/usr/sbin/cupsd" name="/home/.ecryptfs/nick/.ecryptfs/wrapped-passphrase" pid=2625 comm="cupsd" requested_mask="r" denied_mask="r" fsuid=1000 ouid=1000 [ 404.232177] type=1400 audit(1397397602.445:76): apparmor="DENIED" operation="file_lock" parent=1 profile="/usr/sbin/cupsd" name="/run/samba/gencache.tdb" pid=917 comm="cupsd" requested_mask="k" denied_mask="k" fsuid=0 ouid=0 [ 404.361378] type=1400 audit(1397397602.573:77): apparmor="DENIED" operation="open" parent=1 profile="/usr/sbin/cupsd" name="/home/.ecryptfs/nick/.ecryptfs/Private.mnt" pid=917 comm="cupsd" requested_mask="r" denied_mask="r" fsuid=0 ouid=1000 [ 405.134793] type=1400 audit(1397397603.345:78): apparmor="DENIED" operation="open" parent=917 profile="/usr/sbin/cupsd" name="/home/.ecryptfs/nick/.ecryptfs/wrapped-passphrase" pid=2628 comm="cupsd" requested_mask="r" denied_mask="r" fsuid=1000 ouid=1000 [ 440.789483] type=1400 audit(1397397639.003:79): apparmor="DENIED" operation="file_lock" parent=1 profile="/usr/sbin/cupsd" name="/run/samba/gencache.tdb" pid=917 comm="cupsd" requested_mask="k" denied_mask="k" fsuid=0 ouid=0 [ 440.906760] type=1400 audit(1397397639.119:80): apparmor="DENIED" operation="open" parent=1 profile="/usr/sbin/cupsd" name="/home/.ecryptfs/nick/.ecryptfs/Private.mnt" pid=917 comm="cupsd" requested_mask="r" denied_mask="r" fsuid=0 ouid=1000 [ 441.676848] type=1400 audit(1397397639.891:81): apparmor="DENIED" operation="open" parent=917 profile="/usr/sbin/cupsd" name="/home/.ecryptfs/nick/.ecryptfs/wrapped-passphrase" pid=2630 comm="cupsd" requested_mask="r" denied_mask="r" fsuid=1000 ouid=1000 [ 441.773800] parport0: lp already owner Output of ls -l /dev/lp* /dev/parport* crw-rw---- 1 root lp 6, 0 Apr 13 14:53 /dev/lp0 crw-rw---- 1 root lp 99, 0 Apr 13 14:53 /dev/parport0 Output of ls -l /proc/sys/dev/parport/parport*/autoprobe* -r--r--r-- 1 root root 0 Apr 13 14:56 /proc/sys/dev/parport/parport0/autoprobe -r--r--r-- 1 root root 0 Apr 13 14:56 /proc/sys/dev/parport/parport0/autoprobe0 -r--r--r-- 1 root root 0 Apr 13 14:56 /proc/sys/dev/parport/parport0/autoprobe1 -r--r--r-- 1 root root 0 Apr 13 14:56 /proc/sys/dev/parport/parport0/autoprobe2 -r--r--r-- 1 root root 0 Apr 13 14:56 /proc/sys/dev/parport/parport0/autoprobe3 Output of sudo cat /proc/sys/dev/parport/parport*/autoprobe* CLASS:PRINTER; MODEL:DESKJET 840C; MANUFACTURER:HEWLETT-PACKARD; DESCRIPTION:Hewlett-Packard DeskJet 840C; COMMAND SET:MLC,PCL,PML; Output of lpinfo -v network https network ipp14 network http network ipp network beh network socket network ipps network lpd direct usb://Samsung/ML-6040 network smb Output of /usr/lib/cups/backend/parallel No output Output of sudo /usr/lib/cups/backend/parallel direct parallel:/dev/lp0 "HP DESKJET 840C" "HP DESKJET 840C LPT #1" "MFG:HEWLETT-PACKARD;MDL:DESKJET 840C;CMD:MLC,PCL,PML;CLASS:PRINTER;DESCRIPTION:Hewlett-Packard DeskJet 840C;SERN:CN0AP1C216KV;VSTATUS:$HB0$FC0,ff,DN,IDLE,CUT;VP:0800,FL,B0;" "" Output of ubuntu-bug cups ERROR: hook /usr/share/apport/general-hooks/ubuntu.py crashed: Traceback (most recent call last): File "/usr/lib/python2.7/dist-packages/apport/report.py", line 719, in add_hooks_info symb['add_info'](self, ui) File "/usr/share/apport/general-hooks/ubuntu.py", line 92, in add_info attach_conffiles(report, package, ui=ui) File "/usr/lib/python2.7/dist-packages/apport/hookutils.py", line 107, in attach_conffiles modified = packaging.get_modified_conffiles(package) File "/usr/lib/python2.7/dist-packages/apport/packaging_impl.py", line 263, in get_modified_conffiles with open(path, 'rb') as fd: IOError: [Errno 13] Permission denied: u'/etc/cups/cupsd.conf' ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: cups 1.5.3-0ubuntu8 ProcVersionSignature: Ubuntu 3.11.0-19.33~precise1-generic 3.11.10.5 Uname: Linux 3.11.0-19-generic i686 NonfreeKernelModules: fglrx ApportVersion: 2.0.1-0ubuntu17.6 Architecture: i386 Date: Sun Apr 13 21:19:38 2014 EcryptfsInUse: Yes InstallationMedia: Ubuntu 12.04.4 LTS "Precise Pangolin" - Release i386 (20140204) Lpstat: device for ML-6040: usb://Samsung/ML-6040 MachineType: HP Pavilion 061 PN132AA-ABU t760.uk MarkForUpload: True Papersize: a4 PpdFiles: ML-6040: Samsung ML-6040 Foomatic/gdi (recommended) ProcEnviron: LANGUAGE=en_GB:en TERM=xterm PATH=(custom, no user) LANG=en_GB.UTF-8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-19-generic root=UUID=b3a65bee-5330-498a-9b66-c842a014e207 ro quiet splash vt.handoff=7 SourcePackage: cups UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 08/27/2004 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 3.06 dmi.board.name: Puffer dmi.board.vendor: ASUSTeK Computer INC. dmi.board.version: 1.xx dmi.chassis.asset.tag: Asset-1234567890 dmi.chassis.type: 3 dmi.chassis.vendor: Chassis Manufacture dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr3.06:bd08/27/2004:svnHPPavilion061:pnPN132AA-ABUt760.uk:pvr0fS0211RE101PUFFE00:rvnASUSTeKComputerINC.:rnPuffer:rvr1.xx:cvnChassisManufacture:ct3:cvrChassisVersion: dmi.product.name: PN132AA-ABU t760.uk dmi.product.version: 0fS0211RE101PUFFE00 dmi.sys.vendor: HP Pavilion 061 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/cups/+bug/1307221/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
