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[Launchpad Bug Tracker <763327@xxxxxxxxxxxxxxxxxx>]

*** This bug is a duplicate of bug 746717 ***
    https://bugs.launchpad.net/bugs/746717

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: linux (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/763327

Title:
  WARNING: at /build/buildd/linux-2.6.38/net/sched/sch_generic.c:256
  dev_watchdog+0x213/0x220()

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  I attempted to use my iPhone 4 iOS4.3 as an internet modem on my
  installation of Ubuntu 11.04 beta 2

  I plugged my iPhone usb cord to my laptop USB port and iPhone mounted
  successfully.

  turned on the iPhone Personal Hotspot and on my Ubuntu I went to
  network manager and clicked on Auto Ethernet which is the iPhone modem
  name recognized. After I clicked on it the network icon pulsed and the
  error box popped.

  Here's content of dmesg command I issued in the terminal:

  [   19.059650] ppdev: user-space parallel port driver
  [   20.055225] EXT4-fs (sda1): re-mounted. Opts: errors=remount-ro,commit=0
  [   23.575147] EXT4-fs (sda1): re-mounted. Opts: errors=remount-ro,commit=0
  [  112.876140] usb 1-2: new high speed USB device using ehci_hcd and address 4
  [  113.317704] ipheth 1-2:4.2: Apple iPhone USB Ethernet device attached
  [  113.318374] usbcore: registered new interface driver ipheth
  [  113.385521] ADDRCONF(NETDEV_UP): eth1: link is not ready
  [  115.042210] show_signal_msg: 24 callbacks suppressed
  [  115.042217] iphone-set-info[1543]: segfault at 8 ip 00932706 sp bfe20154 error 4 in libc-2.13.so[8b8000+15a000]
  [  413.000761] ADDRCONF(NETDEV_CHANGE): eth1: link becomes ready
  [  418.016042] ------------[ cut here ]------------
  [  418.016063] WARNING: at /build/buildd/linux-2.6.38/net/sched/sch_generic.c:256 dev_watchdog+0x213/0x220()
  [  418.016070] Hardware name: Compaq Presario C700 Notebook PC
  [  418.016076] NETDEV WATCHDOG: eth1 (ipheth): transmit queue 0 timed out
  [  418.016081] Modules linked in: ipheth parport_pc ppdev snd_hda_codec_conexant arc4 binfmt_misc joydev snd_hda_intel snd_hda_codec snd_hwdep i915 ath5k snd_pcm ath mac80211 hp_wmi uvcvideo drm_kms_helper sparse_keymap snd_seq_midi snd_rawmidi videodev drm snd_seq_midi_event psmouse snd_seq cfg80211 serio_raw snd_timer i2c_algo_bit snd_seq_device snd soundcore snd_page_alloc video lp parport usb_storage uas ahci libahci 8139too 8139cp
  [  418.016179] Pid: 0, comm: swapper Not tainted 2.6.38-8-generic #42-Ubuntu
  [  418.016185] Call Trace:
  [  418.016199]  [<c104f912>] ? warn_slowpath_common+0x72/0xa0
  [  418.016209]  [<c144a073>] ? dev_watchdog+0x213/0x220
  [  418.016218]  [<c144a073>] ? dev_watchdog+0x213/0x220
  [  418.016228]  [<c104f9e3>] ? warn_slowpath_fmt+0x33/0x40
  [  418.016238]  [<c144a073>] ? dev_watchdog+0x213/0x220
  [  418.016248]  [<c1069231>] ? __queue_work+0xe1/0x360
  [  418.016259]  [<c10b3d12>] ? rcu_report_qs_rnp+0x72/0x100
  [  418.016270]  [<c105c76b>] ? call_timer_fn+0x2b/0xe0
  [  418.016279]  [<c1127fc9>] ? file_free_rcu+0x29/0x30
  [  418.016287]  [<c1127fc9>] ? file_free_rcu+0x29/0x30
  [  418.016296]  [<c1449e60>] ? dev_watchdog+0x0/0x220
  [  418.016304]  [<c105daa9>] ? run_timer_softirq+0xe9/0x1e0
  [  418.016314]  [<c1449e60>] ? dev_watchdog+0x0/0x220
  [  418.016323]  [<c1056622>] ? __do_softirq+0x82/0x170
  [  418.016332]  [<c10565a0>] ? __do_softirq+0x0/0x170
  [  418.016337]  <IRQ>  [<c10567ed>] ? irq_exit+0x6d/0x80
  [  418.016355]  [<c15107ab>] ? do_IRQ+0x4b/0xc0
  [  418.016365]  [<c1003670>] ? common_interrupt+0x30/0x38
  [  418.016374]  [<c10700d8>] ? do_cpu_nanosleep+0x38/0x1b0
  [  418.016386]  [<c12e8db4>] ? arch_local_irq_enable+0x5/0xb
  [  418.016395]  [<c12e9a9b>] ? acpi_idle_enter_bm+0x227/0x25e
  [  418.016422]  [<c14061fd>] ? cpuidle_idle_call+0x7d/0x160
  [  418.016430]  [<c10019ca>] ? cpu_idle+0x8a/0xc0
  [  418.016439]  [<c1038d2e>] ? complete+0x4e/0x60
  [  418.016451]  [<c14f0d2d>] ? rest_init+0x5d/0x70
  [  418.016462]  [<c178d7e1>] ? start_kernel+0x35f/0x366
  [  418.016470]  [<c178d3d5>] ? pass_all_bootoptions+0x0/0xa
  [  418.016480]  [<c178d0e0>] ? i386_start_kernel+0xe0/0xe8
  [  418.016487] ---[ end trace 9607b312b2cf5e6b ]---
  [  418.016492] ipheth: ipheth_tx_timeout: TX timeout
  [  423.288052] eth1: no IPv6 routers present

  ProblemType: KernelOops
  DistroRelease: Ubuntu 11.04
  Package: linux-image-2.6.38-8-generic 2.6.38-8.42
  Regression: Yes
  Reproducible: Yes
  ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
  Uname: Linux 2.6.38-8-generic i686
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
  Annotation: Your system might become unstable now and might need to be restarted.
  Architecture: i386
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 0: Intel [HDA Intel], device 0: CONEXANT Analog [CONEXANT Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  ariel      1336 F.... pulseaudio
  CRDA: Error: [Errno 2] No such file or directory
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0x92400000 irq 43'
     Mixer name	: 'Conexant CX20561 (Hermosa)'
     Components	: 'HDA:14f15051,103c30d9,00100000'
     Controls      : 14
     Simple ctrls  : 7
  Date: Sun Apr 17 14:08:17 2011
  Failure: oops
  HibernationDevice: RESUME=UUID=44eee9ff-a339-44fa-8fa5-d94a3331b637
  InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Beta i386 (20110413)
  MachineType: Hewlett-Packard Compaq Presario C700 Notebook PC
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-8-generic root=UUID=6835f953-5797-46ef-bf3c-7ad10f228ef4 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-2.6.38-8-generic N/A
   linux-backports-modules-2.6.38-8-generic  N/A
   linux-firmware                            1.50
  SourcePackage: linux
  Title: WARNING: at /build/buildd/linux-2.6.38/net/sched/sch_generic.c:256 dev_watchdog+0x213/0x220()
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 09/25/2008
  dmi.bios.vendor: Hewlett-Packard
  dmi.bios.version: F.34
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: 30D9
  dmi.board.vendor: Hewlett-Packard
  dmi.board.version: 83.21
  dmi.chassis.type: 10
  dmi.chassis.vendor: Hewlett-Packard
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnHewlett-Packard:bvrF.34:bd09/25/2008:svnHewlett-Packard:pnCompaqPresarioC700NotebookPC:pvrF.34:rvnHewlett-Packard:rn30D9:rvr83.21:cvnHewlett-Packard:ct10:cvrN/A:
  dmi.product.name: Compaq Presario C700 Notebook PC
  dmi.product.version: F.34
  dmi.sys.vendor: Hewlett-Packard

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