Hello Timo,
Thank you for submitting this bug and reporting a problem with the 
system-config-printer package.  You made this bug report in 2012 and Ubuntu and 
the system-config-printer package have been updated since then. 

Could you confirm that this is no longer a problem and that we can close the 
ticket? 
If it is still a problem, are you still interested in finding a solution to 
this bug? 
If you are, could you let us know and, in the current version, could you run 
the following (only once):
apport-collect 1034304
and upload the updated logs and and any other logs that are relevant for this 
particular issue. 

Thank you again for helping make Ubuntu better. 
G
[Ubuntu Bug Squad volunteer triager]

** Changed in: system-config-printer (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1034304

Title:
  "/lib/udev/udev-configure-printer enumerate" gets stuck on upgrade

Status in system-config-printer package in Ubuntu:
  Incomplete

Bug description:
  This occured on upgrade but can be reproduced by simply stopping and
  starting cups:

  Steps to reproduce:
  1) sudo stop cups
  2) sudo start cups

  Expected results:
  2) system is idle

  Actual results:
  2) udev-configure-printer process is using a lot of CPU time and does not 
seem to be exiting any time soon:

  $ ps -eopid,%cpu,cmd | grep udev-configure-printe[r]
  22802 33.5 /lib/udev/udev-configure-printer enumerate

  More info:
  1) gdb shows:

  (gdb) thread apply all bt full

  Thread 1 (Thread 0xb703b700 (LWP 22802)):
  #0  0xb7744424 in __kernel_vsyscall ()
  No symbol table info available.
  #1  0xb750f3f1 in recv () from /lib/i386-linux-gnu/libc.so.6
  No symbol table info available.
  #2  0xb76f82ad in _httpReadGNUTLS () from /usr/lib/i386-linux-gnu/libcups.so.2
  No symbol table info available.
  #3  0xb7333c5b in ?? () from /usr/lib/i386-linux-gnu/libgnutls.so.26
  No symbol table info available.
  #4  0xb733457a in ?? () from /usr/lib/i386-linux-gnu/libgnutls.so.26
  No symbol table info available.
  #5  0xb73308ef in _gnutls_recv_int () from 
/usr/lib/i386-linux-gnu/libgnutls.so.26
  No symbol table info available.
  #6  0xb73394a4 in ?? () from /usr/lib/i386-linux-gnu/libgnutls.so.26
  No symbol table info available.
  #7  0xb7339917 in ?? () from /usr/lib/i386-linux-gnu/libgnutls.so.26
  No symbol table info available.
  #8  0xb733b2ad in gnutls_handshake () from 
/usr/lib/i386-linux-gnu/libgnutls.so.26
  No symbol table info available.
  #9  0xb76f6c1e in ?? () from /usr/lib/i386-linux-gnu/libcups.so.2
  No symbol table info available.
  #10 0xb76f87a8 in _httpUpdate () from /usr/lib/i386-linux-gnu/libcups.so.2
  No symbol table info available.
  #11 0xb76f88ec in httpUpdate () from /usr/lib/i386-linux-gnu/libcups.so.2
  No symbol table info available.
  #12 0xb76f9ce0 in ?? () from /usr/lib/i386-linux-gnu/libcups.so.2
  No symbol table info available.
  #13 0xb77136f0 in cupsSendRequest () from /usr/lib/i386-linux-gnu/libcups.so.2
  No symbol table info available.
  #14 0xb7713b08 in cupsDoIORequest () from /usr/lib/i386-linux-gnu/libcups.so.2
  No symbol table info available.
  #15 0xb7713e1b in cupsDoRequest () from /usr/lib/i386-linux-gnu/libcups.so.2
  No symbol table info available.
  #16 0x0804b97c in cupsDoRequestOrDie (resource=0x804d05e "/", 
request=0x8d92350, http=0x8d92668) at udev/udev-configure-printer.c:765
          answer = <optimized out>
  #17 find_matching_device_uris (map=0x8d7e938, devpath=0x8d772e0 
"/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.1/1-1.1.4", uris=0xbfd4bd44, 
      usbserial=0xbfd4cd64 "10071519222388", id=0xbfd4bd24) at 
udev/udev-configure-printer.c:842
          request = 0x8d92350
          answer = 0x0
          uris_noserial = {n_uris = 0, uri = 0x0}
          i = <optimized out>
          exclude_schemes = {0x804cf9c "beh", 0x804cfa0 "cups-pdf", 0x804cfa9 
"bluetooth", 0x804cfb3 "dnssd", 0x804cfb9 "http", 0x804cfbe "https", 
            0x804cfc4 "ipp", 0x804cfc8 "lpd", 0x804cfcc "ncp", 0x804cfd0 
"parallel", 0x804cfd9 "scsi", 0x804cfde "smb", 0x804cfe2 "snmp", 0x804cfe7 
"socket"}
          cups = 0x8d92668
          attr = <optimized out>
          all_uris = {n_uris = 0, uri = 0x0}
          n = <optimized out>
  #18 do_add (cmd=0xbfd4ef3a "/lib/udev/udev-configure-printer", 
      devpath=0x8d7704c 
"/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.1/1-1.1.4/1-1.1.4:1.0/usb/lp1", 
detach=<optimized out>)
      at udev/udev-configure-printer.c:1430
          pid = <optimized out>
          f = 148448080
          id = {full_device_id = 0x8d814e0 "MFG:DYMO;CMD: ;MDL:LabelWriter 
450;CLASS:PRINTER;DESCRIPTION:DYMO LabelWriter 450;SERN:10071519222388;", 
            mfg = 0x8d815c0 "DYMO", mdl = 0x8d815d0 "LabelWriter 450", sern = 
0x8d815e8 "10071519222388"}
          device_uris = {n_uris = 0, uri = 0x0}
          map = 0x8d7e938
          usb_device_devpath = 0x8d772e0 
"/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.1/1-1.1.4"
          usbserial = "10071519222388", '\000' <repeats 241 times>
          usblpdev = "1\000\000\000\000\000\000"
          is_bluetooth = 0
  #19 0x080498b7 in do_enumerate (argv0=0xbfd4ef3a 
"/lib/udev/udev-configure-printer") at udev/udev-configure-printer.c:1661
          k = <optimized out>
          p = <optimized out>
          d = 0x8d776b8
          udev = 0x8d768a8
          e = 0x8d76938
          item = 0x8d7efb0
          first = <optimized out>
          r = <optimized out>
  #20 main (argc=2, argv=0xbfd4cf84) at udev/udev-configure-printer.c:1704
          add = <optimized out>
          enumerate = <optimized out>

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: system-config-printer-udev 1.3.8+20120201-0ubuntu8.1
  ProcVersionSignature: Ubuntu 3.2.0-27.43-generic-pae 3.2.21
  Uname: Linux 3.2.0-27-generic-pae i686
  ApportVersion: 2.0.1-0ubuntu12
  Architecture: i386
  Date: Wed Aug  8 11:43:22 2012
  ExecutablePath: /lib/udev/udev-configure-printer
  MachineType: FUJITSU ESPRIMO E900
  Papersize: a4
  PpdFiles:
   kyykky: HP Deskjet f300 Series, hpcups 3.12.2
   lw450-amn: Dymo Label Printer
  ProcEnviron:
   TERM=linux
   PATH=(custom, no user)
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-27-generic-pae 
root=UUID=87f21e2d-7389-4a2c-98f7-c65a39edb782 ro
  SourcePackage: system-config-printer
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 07/29/2011
  dmi.bios.vendor: FUJITSU // American Megatrends Inc.
  dmi.bios.version: V4.6.4.0 R1.14.0 for D3062-A1x
  dmi.board.name: D3062-A1
  dmi.board.vendor: FUJITSU
  dmi.board.version: S26361-D3062-A1
  dmi.chassis.type: 3
  dmi.chassis.vendor: FUJITSU
  dmi.chassis.version: C$EKW4
  dmi.modalias: 
dmi:bvnFUJITSU//AmericanMegatrendsInc.:bvrV4.6.4.0R1.14.0forD3062-A1x:bd07/29/2011:svnFUJITSU:pnESPRIMOE900:pvr:rvnFUJITSU:rnD3062-A1:rvrS26361-D3062-A1:cvnFUJITSU:ct3:cvrC$EKW4:
  dmi.product.name: ESPRIMO E900
  dmi.sys.vendor: FUJITSU

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