Seen that myself today: [440927.296832] ------------[ cut here ]------------ [440927.296838] WARNING: at /build/buildd-linux-2.6_2.6.32-35squeeze2-amd64-OT816k/linux-2.6-2.6.32/debian/build/source_amd64_none/drivers/usb/serial/usb-serial.c:440 serial_unthrottle+0x53/0x77 [usbserial]() [440927.296840] Hardware name: [440927.296841] Modules linked in: nfs lockd fscache nfs_acl auth_rpcgss sunrpc ftdi_sio usbserial sco bnep rfcomm l2cap crc16 bluetooth rfkill 8021q garp bridge stp vboxnetadp vboxnetflt vboxdrv autofs4 fuse usbhid hid uhci_hcd ohci_hcd snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_timer nvidia(P) snd soundcore snd_page_alloc i2c_i801 i2c_core psmouse pcspkr evdev serio_raw button processor shpchp pci_hotplug usb_storage ext3 jbd mbcache dm_mod raid1 md_mod sg sr_mod sd_mod cdrom crc_t10dif ahci libata scsi_mod xhci ehci_hcd firewire_ohci usbcore firewire_core nls_base crc_itu_t e1000e thermal thermal_sys [last unloaded: scsi_wait_scan] [440927.296869] Pid: 5892, comm: sermon Tainted: P 2.6.32-5-amd64 #1 [440927.296870] Call Trace: [440927.296874] [<ffffffffa01ad5d9>] ? serial_unthrottle+0x53/0x77 [usbserial] [440927.296876] [<ffffffffa01ad5d9>] ? serial_unthrottle+0x53/0x77 [usbserial] [440927.296879] [<ffffffff8104df1c>] ? warn_slowpath_common+0x77/0xa3 [440927.296882] [<ffffffffa01ad5d9>] ? serial_unthrottle+0x53/0x77 [usbserial] [440927.296885] [<ffffffff811fd9f3>] ? tty_unthrottle+0x3c/0x47 [440927.296887] [<ffffffff811fc747>] ? n_tty_flush_buffer+0xc/0x68 [440927.296889] [<ffffffff811ff331>] ? tty_ldisc_flush+0x27/0x3e [440927.296891] [<ffffffff811ffb50>] ? tty_port_close_end+0x18/0xb9 [440927.296893] [<ffffffffa01ad9b2>] ? serial_close+0x78/0x92 [usbserial] [440927.296895] [<ffffffff811fa43e>] ? tty_release_dev+0x1b5/0x4b9 [440927.296897] [<ffffffff81064e37>] ? bit_waitqueue+0x10/0xa0 [440927.296899] [<ffffffff811fa753>] ? tty_release+0x11/0x1a [440927.296902] [<ffffffff810efc05>] ? __fput+0x100/0x1af [440927.296904] [<ffffffff810ed06a>] ? filp_close+0x5b/0x62 [440927.296906] [<ffffffff8104fa20>] ? put_files_struct+0x64/0xc1 [440927.296907] [<ffffffff810512e5>] ? do_exit+0x236/0x6c6 [440927.296910] [<ffffffff812faef0>] ? thread_return+0x79/0xe0 [440927.296912] [<ffffffff810517eb>] ? do_group_exit+0x76/0x9d [440927.296914] [<ffffffff8105e0d7>] ? get_signal_to_deliver+0x310/0x339 [440927.296917] [<ffffffff8101004f>] ? do_notify_resume+0x87/0x73f [440927.296919] [<ffffffff811f95a9>] ? tty_write+0x20b/0x226 [440927.296921] [<ffffffff811f95a9>] ? tty_write+0x20b/0x226 [440927.296922] [<ffffffff811fba93>] ? n_tty_write+0x0/0x349 [440927.296924] [<ffffffff810ef32c>] ? vfs_write+0xa9/0x102 [440927.296926] [<ffffffff81010e0e>] ? int_signal+0x12/0x17 [440927.296927] ---[ end trace ba41fc8150648a41 ]---
'sermon' is a minicom-like application. I searched for references and found: http://linux.derkeiler.com/Mailing-Lists/Kernel/2009-10/msg07056.html (Alan Cox: "Looks like a very very old bug in the tty code") https://bugs.launchpad.net/ubuntu/+source/linux/+bug/625893 Mentioned here too: http://e2e.ti.com/support/embedded/f/509/p/132474/476895.aspx Cheers, -- Cristian -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org