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[Launchpad Bug Tracker <987052@xxxxxxxxxxxxxxxxxx>]

[Expired for linux (Ubuntu) because there has been no activity for 60
days.]

** Changed in: linux (Ubuntu)
       Status: Incomplete => Expired

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https://bugs.launchpad.net/bugs/987052

Title:
  10ec:8172 WARNING: at /build/buildd/linux-3.2.0/kernel/softirq.c:159
  local_bh_enable_ip+0x7a/0xa0()

Status in Release Notes for Ubuntu:
  Invalid
Status in Release Notes for Ubuntu precise series:
  Invalid
Status in “linux” package in Ubuntu:
  Expired

Bug description:
  Suddenly wireless lost connection to AP, did not seem to re-acquire.
  Connected via wire, and system locked. Waited about a minute, then
  forced power cycle.

  After reboot, /var/log/syslog showed this:

  
  2012-04-22T19:18:58.811525-05:00 xango4-wired kernel: [17518.677993] ------------[ cut here ]------------
  2012-04-22T19:18:58.811552-05:00 xango4-wired kernel: [17518.678011] WARNING: at /build/buildd/linux-3.2.0/kernel/softirq.c:159 local_bh_enable_ip+0x7a/0xa0()
  2012-04-22T19:18:58.811556-05:00 xango4-wired kernel: [17518.678016] Hardware name: 3249CTO
  2012-04-22T19:18:58.811577-05:00 xango4-wired kernel: [17518.678018] Modules linked in: pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) ip6table_filter ip6_tables ebtable_nat ebtables ipt_MASQUERADE iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack ipt_REJECT xt_CHECKSUM iptable_mangle xt_tcpudp iptable_filter ip_tables x_tables bridge stp kvm_intel kvm rfcomm parport_pc ppdev bnep bluetooth binfmt_misc dm_crypt arc4 rtl8192se rtlwifi mac80211 uvcvideo asix usbnet videodev v4l2_compat_ioctl32 snd_usb_audio snd_usbmidi_lib cfg80211 snd_hda_codec_hdmi snd_hda_codec_conexant thinkpad_acpi snd_hda_intel snd_hda_codec nvram snd_hwdep snd_pcm snd_seq_midi snd_rawmidi mac_hid snd_seq_midi_event psmouse serio_raw snd_seq snd_timer snd_seq_device snd intel_ips soundcore lp snd_page_alloc parport mei(C) usbhid hid wmi i915 drm_kms_helper drm i2c_algo_bit video e1000e147]  [<ffffffffa03af729>] ? rtl_pci_reset_trx_ring+0x199/0x230 [rtlwifi]
  2012-04-22T19:18:58.811600-05:00 xango4-wired kernel: [17518.678152]  [<ffffffff8106718a>] warn_slowpath_null+0x1a/0x20
  2012-04-22T19:18:58.811603-05:00 xango4-wired kernel: [17518.678158]  [<ffffffff8106e85a>] local_bh_enable_ip+0x7a/0xa0
  2012-04-22T19:18:58.811607-05:00 xango4-wired kernel: [17518.678165]  [<ffffffff8165c579>] _raw_spin_unlock_bh+0x19/0x20
  2012-04-22T19:18:58.811611-05:00 xango4-wired kernel: [17518.678175]  [<ffffffffa04d360d>] destroy_conntrack+0x8d/0xe0 [nf_conntrack]
  2012-04-22T19:18:58.811615-05:00 xango4-wired kernel: [17518.678182]  [<ffffffff8156bba7>] nf_conntrack_destroy+0x17/0x20
  2012-04-22T19:18:58.811620-05:00 xango4-wired kernel: [17518.678189]  [<ffffffff81532a25>] skb_release_head_state+0xe5/0x120
  2012-04-22T19:18:58.811624-05:00 xango4-wired kernel: [17518.678194]  [<ffffffff815327b6>] __kfree_skb+0x16/0x30
  2012-04-22T19:18:58.811627-05:00 xango4-wired kernel: [17518.678200]  [<ffffffff815328c5>] kfree_skb+0x45/0xc0
  2012-04-22T19:18:58.811632-05:00 xango4-wired kernel: [17518.678210]  [<ffffffffa03af729>] rtl_pci_reset_trx_ring+0x199/0x230 [rtlwifi]
  2012-04-22T19:18:58.811636-05:00 xango4-wired kernel: [17518.678220]  [<ffffffffa03ac07a>] rtl_ps_enable_nic+0x7a/0xe0 [rtlwifi]
  2012-04-22T19:18:58.811640-05:00 xango4-wired kernel: [17518.678230]  [<ffffffffa038d048>] rtl92s_phy_set_rf_power_state+0x2d8/0x6a0 [rtl8192se]
  2012-04-22T19:18:58.811644-05:00 xango4-wired kernel: [17518.678237]  [<ffffffff813174c1>] ? __const_udelay+0x31/0x40
  2012-04-22T19:18:58.811649-05:00 xango4-wired kernel: [17518.678247]  [<ffffffffa03abe27>] rtl_ps_set_rf_state+0x67/0x100 [rtlwifi]
  2012-04-22T19:18:58.811652-05:00 xango4-wired kernel: [17518.678256]  [<ffffffffa03abf04>] _rtl_ps_inactive_ps+0x44/0xd0 [rtlwifi]
  2012-04-22T19:18:58.811655-05:00 xango4-wired kernel: [17518.678266]  [<ffffffffa03ac62b>] rtl_ips_nic_on+0x9b/0xc0 [rtlwifi]
  2012-04-22T19:18:58.811660-05:00 xango4-wired kernel: [17518.678275]  [<ffffffffa03a8f85>] rtl_op_config+0x205/0x3a0 [rtlwifi]
  2012-04-22T19:18:58.811664-05:00 xango4-wired kernel: [17518.678296]  [<ffffffffa0306477>] ieee80211_hw_config+0x117/0x230 [mac80211]
  2012-04-22T19:18:58.811668-05:00 xango4-wired kernel: [17518.678314]  [<ffffffffa030cdbd>] ieee80211_scan_work+0x20d/0x3e0 [mac80211]
  2012-04-22T19:18:58.811672-05:00 xango4-wired kernel: [17518.678321]  [<ffffffff8105617a>] ? finish_task_switch+0x4a/0xf0
  2012-04-22T19:18:58.811676-05:00 xango4-wired kernel: [17518.678338]  [<ffffffffa030cbb0>] ? ieee80211_scan_rx+0x190/0x190 [mac80211]
  2012-04-22T19:18:58.811680-05:00 xango4-wired kernel: [17518.678344]  [<ffffffff81084e2a>] process_one_work+0x11a/0x480
  2012-04-22T19:18:58.811684-05:00 xango4-wired kernel: [17518.678350]  [<ffffffff81085bd4>] worker_thread+0x164/0x370
  2012-04-22T19:18:58.811688-05:00 xango4-wired kernel: [17518.678356]  [<ffffffff81085a70>] ? manage_workers.isra.29+0x130/0x130
  2012-04-22T19:18:58.811692-05:00 xango4-wired kernel: [17518.678362]  [<ffffffff8108a42c>] kthread+0x8c/0xa0
  2012-04-22T19:18:58.811696-05:00 xango4-wired kernel: [17518.678368]  [<ffffffff81666bf4>] kernel_thread_helper+0x4/0x10
  2012-04-22T19:18:58.811699-05:00 xango4-wired kernel: [17518.678373]  [<ffffffff8108a3a0>] ? flush_kthread_worker+0xa0/0xa0
  2012-04-22T19:18:58.811703-05:00 xango4-wired kernel: [17518.678378]  [<ffffffff81666bf0>] ? gs_change+0x13/0x13
  2012-04-22T19:18:58.811745-05:00 xango4-wired kernel: [17518.678382] ---[ end trace ca382af221859956 ]---

  I am almost sure this was *not* the final cause for the system to
  become unresponsive -- system kept on for almost one hour after this
  warning.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image-3.2.0-23-generic 3.2.0-23.36
  ProcVersionSignature: Ubuntu 3.2.0-23.36-generic 3.2.14
  Uname: Linux 3.2.0-23-generic x86_64
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 2.0.1-0ubuntu6
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC2:  cerdea     2642 F.... pulseaudio
   /dev/snd/controlC1:  cerdea     2642 F.... pulseaudio
   /dev/snd/controlC0:  cerdea     2642 F.... pulseaudio
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0xf2520000 irq 44'
     Mixer name	: 'Intel IbexPeak HDMI'
     Components	: 'HDA:14f15069,17aa2155,00100302 HDA:80862804,17aa21b5,00100000'
     Controls      : 14
     Simple ctrls  : 6
  Card1.Amixer.info:
   Card hw:1 'Set'/'C-Media USB Headphone Set at usb-0000:00:1a.0-1.1.2, full speed'
     Mixer name	: 'USB Mixer'
     Components	: 'USB0d8c:000c'
     Controls      : 7
     Simple ctrls  : 3
  Card2.Amixer.info:
   Card hw:2 'for'/'Microsoft Microsoft® LifeCam HD-6000 for at usb-0000:00:1a.0-1.1.3.4, high spe'
     Mixer name	: 'USB Mixer'
     Components	: 'USB045e:076f'
     Controls      : 2
     Simple ctrls  : 1
  Card2.Amixer.values:
   Simple mixer control 'Mic',0
     Capabilities: cvolume cvolume-joined cswitch cswitch-joined penum
     Capture channels: Mono
     Limits: Capture 0 - 37
     Mono: Capture 36 [97%] [16.00dB] [on]
  Card29.Amixer.info:
   Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw 8VHT33WW-1.14'
     Mixer name	: 'ThinkPad EC 8VHT33WW-1.14'
     Components	: ''
     Controls      : 1
     Simple ctrls  : 1
  Card29.Amixer.values:
   Simple mixer control 'Console',0
     Capabilities: pswitch pswitch-joined penum
     Playback channels: Mono
     Mono: Playback [on]
  Date: Sun Apr 22 19:32:13 2012
  EcryptfsInUse: Yes
  HibernationDevice: RESUME=UUID=b063a05d-5666-4095-aefd-d6814fcce0b7
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Alpha amd64 (20110705.1)
  MachineType: LENOVO 3249CTO
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-23-generic root=UUID=0dd475f3-1713-4bed-95b6-cd7e3cfba523 ro
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-23-generic N/A
   linux-backports-modules-3.2.0-23-generic  N/A
   linux-firmware                            1.79
  RfKill:
   0: phy0: Wireless LAN
   	Soft blocked: no
   	Hard blocked: no
  SourcePackage: linux
  StagingDrivers: mei
  UpgradeStatus: Upgraded to precise on 2012-02-19 (63 days ago)
  dmi.bios.date: 06/29/2011
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 6QET67WW (1.37 )
  dmi.board.name: 3249CTO
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Available
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvr6QET67WW(1.37):bd06/29/2011:svnLENOVO:pn3249CTO:pvrThinkPadX201:rvnLENOVO:rn3249CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 3249CTO
  dmi.product.version: ThinkPad X201
  dmi.sys.vendor: LENOVO

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