Not sure if this useful to anyone, but since I recorded it, here it is. On an Asus Dual-Opteron, plugging/unplugging a USB DVB card whilst in use (yeah I know I shouldn't do that - I didn't notice that a kaffeine process had refused to die):
[558342.344217] dvb-usb: bulk message failed: -22 (6/-32512) (<snip>) (lots of those with fairly random values in log) [558342.344227] dvb-usb: bulk message failed: -22 (6/-1) [558342.344230] dvb-usb: bulk message failed: -22 (6/-1) [558342.344232] dvb-usb: bulk message failed: -22 (6/-1) [558342.344535] dvb-usb: AVerMedia AverTV DVB-T USB 2.0 (A800) successfully deinitialized and disconnected. [558348.759203] usb 2-6: new high speed USB device using ehci_hcd and address 98 [558348.873574] usb 2-6: configuration #1 chosen from 1 choice [558348.873744] dvb-usb: found a 'AVerMedia AverTV DVB-T USB 2.0 (A800)' in cold state, will try to load a firmware [558348.977552] dvb-usb: downloading firmware from file 'dvb-usb-avertv-a800-02.fw' [558349.052991] usb 2-6: USB disconnect, address 98 [558349.053026] dvb-usb: generic DVB-USB module successfully deinitialized and disconnected. [558351.007473] usb 2-6: new high speed USB device using ehci_hcd and address 99 [558351.122290] usb 2-6: configuration #1 chosen from 1 choice [558351.122456] dvb-usb: found a 'AVerMedia AverTV DVB-T USB 2.0 (A800)' in warm state. [558351.122509] i2c_adapter i2c-3: SMBus Quick command not supported, can't probe for chips [558351.122513] dvb-usb: will pass the complete MPEG2 transport stream to the software demuxer. [558351.122707] DVB: registering new adapter (AVerMedia AverTV DVB-T USB 2.0 (A800)). [558351.528818] i2c_adapter i2c-4: SMBus Quick command not supported, can't probe for chips [558351.529752] DVB: registering frontend 0 (DiBcom 3000MC/P)... [558351.532685] input: IR-receiver inside an USB DVB receiver as /class/input/input19 [558351.532696] dvb-usb: schedule remote query interval to 150 msecs. [558351.532701] dvb-usb: AVerMedia AverTV DVB-T USB 2.0 (A800) successfully initialized and connected. [558385.886866] dvb-usb: error while querying for an remote control event. [558386.021716] usb 2-6: USB disconnect, address 99 [558386.022242] dvb-usb: AVerMedia AverTV DVB-T USB 2.0 (A800) successfully deinitialized and disconnected. [558386.024802] Unable to handle kernel paging request at ffffc200000290ac RIP: [558386.024809] [<ffffffff81322bac>] _spin_lock+0x4c/0x70 [558386.024819] PGD 1bc7067 PUD 12d942067 PMD 1bc8067 PTE 0 [558386.024824] Oops: 0000 [1] PREEMPT SMP [558386.024827] CPU 0 [558386.024829] Modules linked in: usbhid isofs zlib_inflate rfcomm ipt_LOG xt_state l2cap bluetooth iptable_filter w83627hf iptable_nat ip_nat ip_conntrack hwmon_vid nfnetlink ip_tables lm92 ipv6 eeprom i2c_isa snd_seq_midi snd_pcm_oss snd_mixer_oss snd_seq_dummy snd_seq_oss snd_seq_midi_event snd_seq snd_usb_audio snd_usb_lib snd_hwdep af_packet uhci_hcd snd_mpu401 snd_mpu401_uart snd_rawmidi snd_seq_device analog ns558 gameport parport_pc parport pcspkr nvidia(P) tg3 usb_storage libusual sata_sil joydev usbkbd ohci1394 ieee1394 mt2060 dvb_usb_a800 dvb_usb_dibusb_common dib3000mc dibx000_common dvb_usb dvb_core firmware_class dvb_pll ata_generic amd74xx snd_intel8x0 snd_ac97_codec snd_ac97_bus snd_pcm snd_timer snd soundcore snd_page_alloc ehci_hcd ohci_hcd i2c_nforce2 usbcore saa7134 video_buf compat_ioctl32 ir_kbd_i2c ir_common videodev v4l1_compat v4l2_common [558386.024881] Pid: 25910, comm: kaffeine Tainted: P 2.6.19.2 #4 [558386.024884] RIP: 0010:[<ffffffff81322bac>] [<ffffffff81322bac>] _spin_lock+0x4c/0x70 [558386.024890] RSP: 0018:ffff810044e07bf8 EFLAGS: 00010202 [558386.024893] RAX: 0000000000000000 RBX: ffffc200000290ac RCX: 0000000000000000 [558386.024897] RDX: 00000000fffffe00 RSI: ffff810018b76b80 RDI: 0000000000000001 [558386.024900] RBP: ffff810038130100 R08: 0000000000000000 R09: 0000000000000001 [558386.024903] R10: 0000000000000000 R11: ffffffff810a5ca0 R12: ffffc200000290ac [558386.024907] R13: ffffc200000290b8 R14: ffffc200000290a8 R15: 0000000000000000 [558386.024911] FS: 00002b0f71618200(0000) GS:ffffffff81454000(0000) knlGS:00000000f7f246b0 [558386.024914] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [558386.024917] CR2: ffffc200000290ac CR3: 0000000035427000 CR4: 00000000000006e0 [558386.024921] Process kaffeine (pid: 25910, threadinfo ffff810044e06000, task ffff810038130100) [558386.024924] Stack: ffffc200000290a8 ffffffff81321696 ffff810001ba6350 ffffffff81322ce4 [558386.024932] ffff810001ba6340 0000000000000246 ffff8100c89e5b18 ffff81011d13ef98 [558386.024938] ffffc20000029000 ffff81007ccc2ea8 ffff81011d13f010 ffffffff8810c28f [558386.024944] Call Trace: [558386.024950] [<ffffffff81321696>] __mutex_lock_interruptible_slowpath+0x26/0xe0 [558386.024955] [<ffffffff81322ce4>] _spin_unlock+0x14/0x40 [558386.024977] [<ffffffff8810c28f>] :dvb_core:dvb_demux_release+0x4f/0x150 [558386.024986] [<ffffffff81090b82>] __fput+0xa2/0x1c0 [558386.024993] [<ffffffff8108d911>] filp_close+0x71/0x90 [558386.025000] [<ffffffff810349ce>] put_files_struct+0x6e/0xe0 [558386.025007] [<ffffffff81035f45>] do_exit+0x275/0x970 [558386.025011] [<ffffffff8103c49c>] del_timer_sync+0xc/0x20 [558386.025017] [<ffffffff81322ce4>] _spin_unlock+0x14/0x40 [558386.025025] [<ffffffff810366d8>] do_group_exit+0x98/0xa0 [558386.025031] [<ffffffff8103f827>] get_signal_to_deliver+0x3f7/0x450 [558386.025039] [<ffffffff8100961a>] do_notify_resume+0xca/0x7a0 [558386.025046] [<ffffffff81322da6>] _spin_unlock_irqrestore+0x16/0x40 [558386.025053] [<ffffffff8102b700>] default_wake_function+0x0/0x10 [558386.025063] [<ffffffff8101dec8>] do_gettimeoffset_pm+0x8/0x30 [558386.025072] [<ffffffff8104e825>] sys_futex+0x115/0x150 [558386.025078] [<ffffffff8100a1a7>] sysret_signal+0x1c/0x27 [558386.025082] [<ffffffff8100a447>] ptregscall_common+0x67/0xb0 [558386.025094] [558386.025095] [558386.025096] Code: 8b 03 85 c0 7f b2 44 8b 4b 04 45 85 c9 75 ef eb a7 66 66 90 [558386.025106] RIP [<ffffffff81322bac>] _spin_lock+0x4c/0x70 [558386.025110] RSP <ffff810044e07bf8> [558386.025113] CR2: ffffc200000290ac [558386.025115] <1>Fixing recursive fault but reboot is needed! ------------------------------------------------------------------------- Using Tomcat but need to do more? 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