On Sunday 06 January 2008, Eric W. Biederman wrote:
quoted text
> Short of two programs coming in and simultaneously trying to claim
> the parallel port and there being not exclusion in ppdev.c I don't
> have a clue what could cause the reported error.

That could well be the root cause as the full log shows:

Jan  6 01:21:02 faramir kernel: ppdev0: registered pardevice
Jan  6 01:21:03 faramir kernel: sysctl table check failed: /dev/parport/parport0/devices/ppdev0/timeslice  Sysctl already exists
Jan  6 01:21:03 faramir kernel: Pid: 11078, comm: hpijs Not tainted 2.6.24-rc6 #1
Jan  6 01:21:03 faramir kernel:
Jan  6 01:21:03 faramir kernel: Call Trace:
Jan  6 01:21:03 faramir kernel:  [<ffffffff8024c104>] set_fail+0x3f/0x47
Jan  6 01:21:03 faramir kernel:  [<ffffffff8024c5ba>] sysctl_check_table+0x4ae/0x4fb
Jan  6 01:21:03 faramir kernel:  [<ffffffff8024c0b6>] sysctl_check_lookup+0xc1/0xd0
Jan  6 01:21:03 faramir kernel:  [<ffffffff8024c5d0>] sysctl_check_table+0x4c4/0x4fb
Jan  6 01:21:03 faramir kernel:  [<ffffffff8024c0b6>] sysctl_check_lookup+0xc1/0xd0
Jan  6 01:21:03 faramir kernel:  [<ffffffff8024c5d0>] sysctl_check_table+0x4c4/0x4fb
Jan  6 01:21:03 faramir kernel:  [<ffffffff8024c0b6>] sysctl_check_lookup+0xc1/0xd0
Jan  6 01:21:03 faramir kernel:  [<ffffffff8024c5d0>] sysctl_check_table+0x4c4/0x4fb
Jan  6 01:21:03 faramir kernel:  [<ffffffff8024c0b6>] sysctl_check_lookup+0xc1/0xd0
Jan  6 01:21:03 faramir kernel:  [<ffffffff8024c5d0>] sysctl_check_table+0x4c4/0x4fb
Jan  6 01:21:03 faramir kernel:  [<ffffffff8024c0b6>] sysctl_check_lookup+0xc1/0xd0
Jan  6 01:21:03 faramir kernel:  [<ffffffff8024c5d0>] sysctl_check_table+0x4c4/0x4fb
Jan  6 01:21:03 faramir kernel:  [<ffffffff8023ca8d>] register_sysctl_table+0x52/0x9d
Jan  6 01:21:03 faramir kernel:  [<ffffffff881ea7cb>] :parport:parport_device_proc_register+0xc3/0xe3
Jan  6 01:21:03 faramir kernel:  [<ffffffff881e8da7>] :parport:parport_register_device+0x206/0x267
Jan  6 01:21:03 faramir kernel:  [<ffffffff884151ae>] :ppdev:pp_irq+0x0/0x40
Jan  6 01:21:03 faramir kernel:  [<ffffffff8841574f>] :ppdev:pp_ioctl+0x13f/0x77c
Jan  6 01:21:03 faramir kernel:  [<ffffffff80296a55>] do_ioctl+0x55/0x6b
Jan  6 01:21:03 faramir kernel:  [<ffffffff80296cae>] vfs_ioctl+0x243/0x25c
Jan  6 01:21:03 faramir kernel:  [<ffffffff80296d18>] sys_ioctl+0x51/0x71
Jan  6 01:21:03 faramir kernel:  [<ffffffff8020beee>] system_call+0x7e/0x83
Jan  6 01:21:03 faramir kernel:
Jan  6 01:21:03 faramir kernel: ppdev0: registered pardevice
Jan  6 01:22:10 faramir kernel: ppdev0: released pardevice because user-space forgot
Jan  6 01:22:10 faramir kernel: ppdev0: unregistered pardevice
Jan  6 01:22:11 faramir kernel: ppdev0: unregistered pardevice
Jan  6 03:24:57 faramir kernel: fuse exit

Sorry for not providing that info earlier, but the first time I had this
issue I had two print jobs after eachother and because of that I overlooked
the double registering.

I am printing through CUPS on a fairly standard Debian unstable system
running the KDE desktop.
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