It has been happening to me regularly on AMD64 dual core, causing USB devices to stop. uname -a Linux mike 2.6.32-28-generic #55-Ubuntu SMP Mon Jan 10 23:42:43 UTC 2011 x86_64 GNU/Linux
USB devices will only work if rebooted. The USB disconnect message was NOT caused by physical intervention - it just happens. [ 401.047139] usb 1-8: USB disconnect, address 5 [ 600.422545] INFO: task khubd:30 blocked for more than 120 seconds. [ 600.422554] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 600.422560] khubd D 0000000000000000 0 30 2 0x00000000 [ 600.422571] ffff88007ca95ad0 0000000000000046 0000000000015bc0 0000000000015bc0 [ 600.422580] ffff88007ca71aa8 ffff88007ca95fd8 0000000000015bc0 ffff88007ca716f0 [ 600.422588] 0000000000015bc0 ffff88007ca95fd8 0000000000015bc0 ffff88007ca71aa8 [ 600.422596] Call Trace: [ 600.422630] [<ffffffffa0d0a7b5>] dvb_unregister_frontend+0xc5/0x110 [dvb_core] [ 600.422644] [<ffffffff81084720>] ? autoremove_wake_function+0x0/0x40 [ 600.422656] [<ffffffffa0103332>] dvb_usb_adapter_frontend_exit+0x22/0x40 [dvb_usb] [ 600.422666] [<ffffffffa0102523>] dvb_usb_exit+0x63/0x110 [dvb_usb] [ 600.422675] [<ffffffffa0102619>] dvb_usb_device_exit+0x49/0x60 [dvb_usb] [ 600.422686] [<ffffffff813dc164>] usb_unbind_interface+0x124/0x170 [ 600.422696] [<ffffffff8136b7ff>] __device_release_driver+0x6f/0xe0 [ 600.422702] [<ffffffff8136b96d>] device_release_driver+0x2d/0x40 [ 600.422709] [<ffffffff8136a98a>] bus_remove_device+0x9a/0xc0 [ 600.422718] [<ffffffff81368ae7>] device_del+0x127/0x1d0 [ 600.422724] [<ffffffff813d88e0>] usb_disable_device+0x70/0x130 [ 600.422734] [<ffffffff813d26b2>] usb_disconnect+0xd2/0x170 [ 600.422740] [<ffffffff813d2d22>] hub_port_connect_change+0x92/0x9d0 [ 600.422746] [<ffffffff813d4062>] hub_events+0x3b2/0x5a0 [ 600.422755] [<ffffffff81542903>] ? thread_return+0x223/0x420 [ 600.422762] [<ffffffff813d42a5>] hub_thread+0x55/0x190 [ 600.422768] [<ffffffff81084720>] ? autoremove_wake_function+0x0/0x40 [ 600.422774] [<ffffffff813d4250>] ? hub_thread+0x0/0x190 [ 600.422780] [<ffffffff810843a6>] kthread+0x96/0xa0 [ 600.422788] [<ffffffff810131ea>] child_rip+0xa/0x20 [ 600.422794] [<ffffffff81084310>] ? kthread+0x0/0xa0 [ 600.422800] [<ffffffff810131e0>] ? child_rip+0x0/0x20 [ 720.422543] INFO: task khubd:30 blocked for more than 120 seconds. [ 720.422551] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 720.422557] khubd D 0000000000000000 0 30 2 0x00000000 [ 720.422567] ffff88007ca95ad0 0000000000000046 0000000000015bc0 0000000000015bc0 [ 720.422576] ffff88007ca71aa8 ffff88007ca95fd8 0000000000015bc0 ffff88007ca716f0 [ 720.422584] 0000000000015bc0 ffff88007ca95fd8 0000000000015bc0 ffff88007ca71aa8 [ 720.422592] Call Trace: [ 720.422627] [<ffffffffa0d0a7b5>] dvb_unregister_frontend+0xc5/0x110 [dvb_core] [ 720.422641] [<ffffffff81084720>] ? autoremove_wake_function+0x0/0x40 [ 720.422654] [<ffffffffa0103332>] dvb_usb_adapter_frontend_exit+0x22/0x40 [dvb_usb] [ 720.422663] [<ffffffffa0102523>] dvb_usb_exit+0x63/0x110 [dvb_usb] [ 720.422673] [<ffffffffa0102619>] dvb_usb_device_exit+0x49/0x60 [dvb_usb] [ 720.422683] [<ffffffff813dc164>] usb_unbind_interface+0x124/0x170 [ 720.422693] [<ffffffff8136b7ff>] __device_release_driver+0x6f/0xe0 [ 720.422699] [<ffffffff8136b96d>] device_release_driver+0x2d/0x40 [ 720.422706] [<ffffffff8136a98a>] bus_remove_device+0x9a/0xc0 [ 720.422715] [<ffffffff81368ae7>] device_del+0x127/0x1d0 [ 720.422721] [<ffffffff813d88e0>] usb_disable_device+0x70/0x130 [ 720.422731] [<ffffffff813d26b2>] usb_disconnect+0xd2/0x170 [ 720.422737] [<ffffffff813d2d22>] hub_port_connect_change+0x92/0x9d0 [ 720.422743] [<ffffffff813d4062>] hub_events+0x3b2/0x5a0 [ 720.422752] [<ffffffff81542903>] ? thread_return+0x223/0x420 [ 720.422759] [<ffffffff813d42a5>] hub_thread+0x55/0x190 [ 720.422765] [<ffffffff81084720>] ? autoremove_wake_function+0x0/0x40 [ 720.422771] [<ffffffff813d4250>] ? hub_thread+0x0/0x190 [ 720.422777] [<ffffffff810843a6>] kthread+0x96/0xa0 [ 720.422785] [<ffffffff810131ea>] child_rip+0xa/0x20 [ 720.422791] [<ffffffff81084310>] ? kthread+0x0/0xa0 [ 720.422797] [<ffffffff810131e0>] ? child_rip+0x0/0x20 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/558532 Title: After removing dvb-t usb stick (MSI Digivox duo, af9015 based)usb subsystem hangs -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
