Sep  2 10:53:09 quadrispro-msiu90 kernel: [  334.425261] BUG: unable to handle kernel paging request at b10425df
Sep  2 10:53:09 quadrispro-msiu90 kernel: [  334.425289] IP: [<f87e50bd>] usb_serial_disconnect+0xdd/0x160 [usbserial]
Sep  2 10:53:09 quadrispro-msiu90 kernel: [  334.425338] *pde = 00000000 
Sep  2 10:53:09 quadrispro-msiu90 kernel: [  334.425356] Oops: 0000 [#1] SMP 
Sep  2 10:53:09 quadrispro-msiu90 kernel: [  334.425374] last sysfs file: /sys/devices/pci0000:00/0000:00:1d.7/usb1/1-2/1-2:1.3/ttyUSB2/tty/ttyUSB2/uevent
Sep  2 10:53:09 quadrispro-msiu90 kernel: [  334.425393] Modules linked in: ppp_async crc_ccitt option usbserial isofs udf crc_itu_t binfmt_misc ppdev lp parport snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_pcm_oss snd_mixer_oss snd_pcm snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device snd psmouse soundcore snd_page_alloc rtl8187se(C) serio_raw usb_storage r8169 mii dm_raid45 xor fbcon tileblit font bitblit softcursor i915 drm i2c_algo_bit video output intel_agp agpgart
Sep  2 10:53:09 quadrispro-msiu90 kernel: [  334.425625] 
Sep  2 10:53:09 quadrispro-msiu90 kernel: [  334.425644] Pid: 265, comm: khubd Tainted: G         C (2.6.31-9-generic #29-Ubuntu) U-100
Sep  2 10:53:09 quadrispro-msiu90 kernel: [  334.425663] EIP: 0060:[<f87e50bd>] EFLAGS: 00010246 CPU: 0
Sep  2 10:53:09 quadrispro-msiu90 kernel: [  334.425697] EIP is at usb_serial_disconnect+0xdd/0x160 [usbserial]
Sep  2 10:53:09 quadrispro-msiu90 kernel: [  334.425715] EAX: f41d85a0 EBX: f41d85d8 ECX: 00000000 EDX: b104257b
Sep  2 10:53:09 quadrispro-msiu90 kernel: [  334.425732] ESI: f41a741c EDI: f41d85a0 EBP: f7225e20 ESP: f7225e00
Sep  2 10:53:09 quadrispro-msiu90 kernel: [  334.425749]  DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
Sep  2 10:53:09 quadrispro-msiu90 kernel: [  334.425768] Process khubd (pid: 265, ti=f7224000 task=f70e9920 task.ti=f7224000)
Sep  2 10:53:09 quadrispro-msiu90 kernel: [  334.425781] Stack:
Sep  2 10:53:09 quadrispro-msiu90 kernel: [  334.425793]  00000003 f7225e20 c040b549 00000000 f41a7400 f41a7400 f41a741c f85662e0
Sep  2 10:53:09 quadrispro-msiu90 kernel: [  334.425837] <0> f7225e3c c040e5e9 00000000 f41b8c00 f41a741c f8566314 c076a4a0 f7225e4c
Sep  2 10:53:09 quadrispro-msiu90 kernel: [  334.425885] <0> c039d93e f41a7450 f41a741c f7225e5c c039da50 c076a4a0 f41a741c f7225e70
Sep  2 10:53:09 quadrispro-msiu90 kernel: [  334.425935] Call Trace:
Sep  2 10:53:09 quadrispro-msiu90 kernel: [  334.425965]  [<c040b549>] ? usb_disable_interface+0x39/0x50
Sep  2 10:53:09 quadrispro-msiu90 kernel: [  334.425992]  [<c040e5e9>] ? usb_unbind_interface+0xe9/0x120
Sep  2 10:53:09 quadrispro-msiu90 kernel: [  334.426020]  [<c039d93e>] ? __device_release_driver+0x3e/0x90
Sep  2 10:53:09 quadrispro-msiu90 kernel: [  334.426044]  [<c039da50>] ? device_release_driver+0x20/0x40
Sep  2 10:53:09 quadrispro-msiu90 kernel: [  334.426067]  [<c039cd93>] ? bus_remove_device+0x73/0x90
Sep  2 10:53:09 quadrispro-msiu90 kernel: [  334.426090]  [<c039b4ff>] ? device_del+0xef/0x150
Sep  2 10:53:09 quadrispro-msiu90 kernel: [  334.426114]  [<c040b49d>] ? usb_disable_device+0x7d/0xf0
Sep  2 10:53:09 quadrispro-msiu90 kernel: [  334.426138]  [<c04060ee>] ? usb_disconnect+0x9e/0x110
Sep  2 10:53:09 quadrispro-msiu90 kernel: [  334.426162]  [<c040649d>] ? hub_port_connect_change+0x7d/0x830
Sep  2 10:53:09 quadrispro-msiu90 kernel: [  334.426187]  [<c040c170>] ? usb_control_msg+0xd0/0x120
Sep  2 10:53:09 quadrispro-msiu90 kernel: [  334.426213]  [<c0400100>] ? mmc_ioctl_cdrom_subchannel+0xd0/0x160
Sep  2 10:53:09 quadrispro-msiu90 kernel: [  334.426237]  [<c0407d05>] ? hub_events+0x1f5/0x500
Sep  2 10:53:09 quadrispro-msiu90 kernel: [  334.426261]  [<c056675c>] ? schedule+0x40c/0x730
Sep  2 10:53:09 quadrispro-msiu90 kernel: [  334.426286]  [<c0157a8a>] ? finish_wait+0x4a/0x70
Sep  2 10:53:09 quadrispro-msiu90 kernel: [  334.426309]  [<c0408010>] ? hub_thread+0x0/0x150
Sep  2 10:53:09 quadrispro-msiu90 kernel: [  334.426331]  [<c0408045>] ? hub_thread+0x35/0x150
Sep  2 10:53:09 quadrispro-msiu90 kernel: [  334.426353]  [<c0157930>] ? autoremove_wake_function+0x0/0x40
Sep  2 10:53:09 quadrispro-msiu90 kernel: [  334.426375]  [<c015763c>] ? kthread+0x7c/0x90
Sep  2 10:53:09 quadrispro-msiu90 kernel: [  334.426397]  [<c01575c0>] ? kthread+0x0/0x90
Sep  2 10:53:09 quadrispro-msiu90 kernel: [  334.426421]  [<c0103f17>] ? kernel_thread_helper+0x7/0x10
Sep  2 10:53:09 quadrispro-msiu90 kernel: [  334.426434] Code: 01 c7 83 94 01 00 00 03 00 00 00 e8 6e 63 bb c7 c7 83 94 01 00 00 00 00 00 00 0f b6 47 0e 39 f0 7f 87 8d 74 26 00 8b 57 04 89 f8 <ff> 52 64 89 f8 e8 b9 fd ff ff 8b 45 f0 8b 58 24 83 c0 1c e8 4b 
Sep  2 10:53:09 quadrispro-msiu90 kernel: [  334.426685] EIP: [<f87e50bd>] usb_serial_disconnect+0xdd/0x160 [usbserial] SS:ESP 0068:f7225e00
Sep  2 10:53:09 quadrispro-msiu90 kernel: [  334.426733] CR2: 00000000b10425df
Sep  2 10:53:09 quadrispro-msiu90 kernel: [  334.426749] ---[ end trace 48afc80066c48479 ]---