Comment 41 for bug 460857

I'm running kernel "2.6.32-22-generic #36-Ubuntu SMP Thu Jun 3 19:31:57 UTC 2010 x86_64" and I'm still affected by the nearly the same problem. Although I can get some data, after a few seconds of data I end up in the same state and no data will pass. All subsequent close/open's on /dev/ttyUSB0 will block forever and the parent process will zombie. Quite annoying as I have no IR remote control after upgrading my mythbuntu :(

[ 960.770389] INFO: task irserver64:2122 blocked for more than 120 seconds.
[ 960.770397] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 960.770404] irserver64 D ffffffff81557ea0 0 2122 2111 0x00000000
[ 960.770416] ffff8800111b9a38 0000000000000046 0000000000015bc0 0000000000015bc0
[ 960.770426] ffff880026a8c890 ffff8800111b9fd8 0000000000015bc0 ffff880026a8c4d0
[ 960.770435] 0000000000015bc0 ffff8800111b9fd8 0000000000015bc0 ffff880026a8c890
[ 960.770443] Call Trace:
[ 960.770459] [<ffffffff813d4d85>] usb_kill_urb+0x85/0xc0
[ 960.770470] [<ffffffff81085320>] ? autoremove_wake_function+0x0/0x40
[ 960.770496] [<ffffffffa015d070>] ftdi_close+0x40/0x80 [ftdi_sio]
[ 960.770512] [<ffffffffa0138941>] serial_down+0x71/0x80 [usbserial]
[ 960.770524] [<ffffffffa0138c6e>] serial_close+0x7e/0xc0 [usbserial]
[ 960.770536] [<ffffffff8132ac23>] tty_release_dev+0x163/0x5e0
[ 960.770544] [<ffffffff81181da9>] ? locks_delete_lock+0x79/0xa0
[ 960.770553] [<ffffffff81540f1d>] ? unlock_kernel+0x2d/0x40
[ 960.770560] [<ffffffff81182023>] ? locks_remove_flock+0xe3/0x120
[ 960.770567] [<ffffffff8118269b>] ? vfs_lock_file+0x3b/0x40
[ 960.770574] [<ffffffff81182731>] ? locks_remove_posix+0x91/0xc0
[ 960.770582] [<ffffffff8132b0be>] tty_release+0x1e/0x30
[ 960.770590] [<ffffffff81144305>] __fput+0xf5/0x210
[ 960.770597] [<ffffffff81144445>] fput+0x25/0x30
[ 960.770604] [<ffffffff8114053d>] filp_close+0x5d/0x90
[ 960.770613] [<ffffffff81068d8f>] put_files_struct+0x7f/0xf0
[ 960.770621] [<ffffffff81068e54>] exit_files+0x54/0x70
[ 960.770628] [<ffffffff8106b3ab>] do_exit+0x14b/0x380
[ 960.770636] [<ffffffff8106b635>] do_group_exit+0x55/0xd0
[ 960.770645] [<ffffffff8107bf77>] get_signal_to_deliver+0x1d7/0x3d0
[ 960.770654] [<ffffffff81012a35>] do_signal+0x75/0x1c0
[ 960.770664] [<ffffffff812b736d>] ? __up_write+0xdd/0x150
[ 960.770673] [<ffffffff81153b98>] ? poll_select_copy_remaining+0xf8/0x150
[ 960.770682] [<ffffffff81012bdd>] do_notify_resume+0x5d/0x80
[ 960.770690] [<ffffffff8101347e>] int_signal+0x12/0x17