[34623.629609] usb 6-1: pl2303 converter now attached to ttyUSB0
[34623.629648] usbcore: registered new interface driver pl2303
[34623.629654] pl2303: Prolific PL2303 USB to serial adaptor driver
[37086.071728] ------------[ cut here ]------------
[37086.071740] WARNING: at /build/buildd/linux-2.6.32/drivers/usb/serial/usb-serial.c:440 serial_unthrottle+0x8c/0x90 [usbserial]()
[37086.071744] Hardware name: G60VX
[37086.071746] Modules linked in: pl2303 usbserial binfmt_misc ppdev snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_pcm_oss snd_mixer_oss snd_pcm snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi snd_seq_midi_event fbcon tileblit font snd_seq snd_timer snd_seq_device bitblit arc4 video sdhci_pci snd soundcore iwlagn uvcvideo videodev v4l1_compat joydev coretemp asus_laptop softcursor output sdhci ricoh_mmc snd_page_alloc v4l2_compat_ioctl32 iwlcore nvidia(P) vga16fb mac80211 vgastate intel_agp led_class cfg80211 psmouse serio_raw lp parport ohci1394 ieee1394 ahci r8169 mii
[37086.071805] Pid: 25704, comm: megatunix Tainted: P           2.6.32-39-generic #86-Ubuntu
[37086.071809] Call Trace:
[37086.071817]  [<ffffffff810665ab>] warn_slowpath_common+0x7b/0xc0
[37086.071822]  [<ffffffff81066604>] warn_slowpath_null+0x14/0x20
[37086.071828]  [<ffffffffa0c376ac>] serial_unthrottle+0x8c/0x90 [usbserial]
[37086.071833]  [<ffffffff813339a9>] tty_unthrottle+0x49/0x60
[37086.071837]  [<ffffffff81331701>] reset_buffer_flags+0xd1/0x100
[37086.071841]  [<ffffffff8133174d>] n_tty_flush_buffer+0x1d/0x90
[37086.071845]  [<ffffffff81334aef>] ? tty_ldisc_try+0x4f/0x60
[37086.071849]  [<ffffffff81335317>] tty_ldisc_flush+0x37/0x60
[37086.071853]  [<ffffffff8133658e>] tty_port_close_end+0x2e/0x100
[37086.071859]  [<ffffffffa0c37d09>] serial_close+0x89/0xc0 [usbserial]
[37086.071863]  [<ffffffff8132eaf3>] tty_release_dev+0x163/0x5e0
[37086.071869]  [<ffffffff8117c6c0>] ? idr_callback+0x0/0x80
[37086.071874]  [<ffffffff81545ecd>] ? wait_for_completion+0x1d/0x20
[37086.071879]  [<ffffffff815467de>] ? mutex_lock+0x1e/0x50
[37086.071883]  [<ffffffff8132ef8e>] tty_release+0x1e/0x30
[37086.071888]  [<ffffffff81145f75>] __fput+0xf5/0x210
[37086.071892]  [<ffffffff811460b5>] fput+0x25/0x30
[37086.071896]  [<ffffffff811421dd>] filp_close+0x5d/0x90
[37086.071901]  [<ffffffff8106876f>] put_files_struct+0x7f/0xf0
[37086.071905]  [<ffffffff81068834>] exit_files+0x54/0x70
[37086.071909]  [<ffffffff8106ad9b>] do_exit+0x15b/0x390
[37086.071913]  [<ffffffff8106b025>] do_group_exit+0x55/0xd0
[37086.071918]  [<ffffffff8107ba67>] get_signal_to_deliver+0x1d7/0x3d0
[37086.071924]  [<ffffffff81011a25>] do_signal+0x75/0x1c0
[37086.071928]  [<ffffffff8106a58e>] ? sys_wait4+0xae/0x100
[37086.071932]  [<ffffffff810684d0>] ? child_wait_callback+0x0/0x70
[37086.071937]  [<ffffffff81098ab9>] ? do_futex+0xc9/0x1b0
[37086.071941]  [<ffffffff81011bcd>] do_notify_resume+0x5d/0x80
[37086.071946]  [<ffffffff8101247e>] int_signal+0x12/0x17
[37086.071949] ---[ end trace 130ef81e9a8a2e75 ]---
[37094.345308] __ratelimit: 24 callbacks suppressed
[37094.345314] megatunix[25821]: segfault at ffffffffac000e78 ip 0000000000453afb sp 00007fd9b4416bf0 error 6 in megatunix[400000+14d000]
noah@noah-260m:~$