[ 3576.005804] usb 4-1: Set SEL for device-initiated U1 failed.
[ 3576.009481] usb 4-1: Set SEL for device-initiated U2 failed.
[ 3576.100393] hub 4-1:1.0: hub_port_status failed (err = -71)
[ 3576.104131] hub 4-1:1.0: hub_port_status failed (err = -71)
[ 3576.126184] usb 4-1: USB disconnect, device number 39
[ 3577.201152] hub 4-1:1.0: activate --> -19
[ 3584.053041] xhci_hcd 0000:02:00.0: Timeout while waiting for address device command
[ 3614.844249] xhci_hcd 0000:02:00.0: Stopped the command ring failed, maybe the host is dead
[ 3614.844278] xhci_hcd 0000:02:00.0: Abort command ring failed
[ 3614.844294] INFO: rcu_preempt detected stalls on CPUs/tasks: { 2} (detected by 3, t=30811 jiffies, g=87253, c=87252, q=70)
[ 3614.844300] sending NMI to all CPUs:
[ 3614.844304] NMI backtrace for cpu 3
[ 3614.844308] CPU: 3 PID: 11472 Comm: Socket Thread Not tainted 3.13.0-rc8 #2
[ 3614.844310] Hardware name: Dell Inc.          Dell System XPS L321X/085X6F, BIOS A08 01/22/2013
[ 3614.844312] task: ffff88009bde06f0 ti: ffff8800b04e8000 task.ti: ffff8800b04e8000
[ 3614.844314] RIP: 0010:[<ffffffff8128d9e4>]  [<ffffffff8128d9e4>] delay_tsc+0x34/0xa0
[ 3614.844322] RSP: 0018:ffff88011fb83e50  EFLAGS: 00000087
[ 3614.844324] RAX: 000000006f1dad0d RBX: 0000000000002710 RCX: 000000000000002b
[ 3614.844326] RDX: 0000000000000026 RSI: 000000006f1dace7 RDI: 0000000000185be7
[ 3614.844328] RBP: ffffffff819990c0 R08: 0000000000000003 R09: 0000000000000491
[ 3614.844330] R10: 61206f7420494d4e R11: 3a73555043206c6c R12: 0000000000000003
[ 3614.844332] R13: ffffffff819f9fd0 R14: 0000000000000001 R15: ffffffff819990c0
[ 3614.844335] FS:  00007f12024ff700(0000) GS:ffff88011fb80000(0000) knlGS:0000000000000000
[ 3614.844337] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 3614.844339] CR2: 00007f6dfa124000 CR3: 00000000a5e1c000 CR4: 00000000000407e0
[ 3614.844340] Stack:
[ 3614.844342]  ffffffff8102bc75 ffff88011fb8d400 ffffffff8108085c 0000000000011980
[ 3614.844346]  0000000000000046 000000019bde06f0 0000000000000083 ffff88009bde06f0
[ 3614.844349]  ffff88009bde06f0 0000000000000000 0000000000000003 ffffffff8108a7e0
[ 3614.844352] Call Trace:
[ 3614.844354]  <IRQ>

[ 3614.844359]  [<ffffffff8102bc75>] ? arch_trigger_all_cpu_backtrace+0x55/0x70
[ 3614.844365]  [<ffffffff8108085c>] ? rcu_check_callbacks+0x60c/0x680
[ 3614.844369]  [<ffffffff8108a7e0>] ? tick_init_highres+0x10/0x10
[ 3614.844374]  [<ffffffff8104954f>] ? update_process_times+0x3f/0x80
[ 3614.844378]  [<ffffffff8108a82d>] ? tick_sched_timer+0x4d/0x130
[ 3614.844382]  [<ffffffff8105e0de>] ? __run_hrtimer.isra.31+0x4e/0xe0
[ 3614.844385]  [<ffffffff8105e705>] ? hrtimer_interrupt+0xf5/0x250
[ 3614.844391]  [<ffffffff8102a6d6>] ? smp_apic_timer_interrupt+0x36/0x50
[ 3614.844396]  [<ffffffff8171ac4a>] ? apic_timer_interrupt+0x6a/0x70
[ 3614.844398]  <EOI>

[ 3614.844403]  [<ffffffff812a45d0>] ? swiotlb_unmap_sg+0x10/0x10
[ 3614.844407]  [<ffffffff817148d5>] ? _raw_spin_unlock_irqrestore+0x5/0x20
[ 3614.844411]  [<ffffffff8148a46d>] ? usbnet_start_xmit+0x15d/0x5e0
[ 3614.844416]  [<ffffffff815a86e9>] ? dev_hard_start_xmit+0x2d9/0x490
[ 3614.844419]  [<ffffffff815c2e35>] ? sch_direct_xmit+0xf5/0x1e0
[ 3614.844422]  [<ffffffff815a8a72>] ? __dev_queue_xmit+0x1d2/0x460
[ 3614.844427]  [<ffffffff81607fd0>] ? __ip_append_data.isra.45+0x9e0/0x9e0
[ 3614.844431]  [<ffffffff81608295>] ? ip_finish_output+0x2c5/0x3b0
[ 3614.844434]  [<ffffffff8160856c>] ? ip_queue_xmit+0x13c/0x350
[ 3614.844438]  [<ffffffff8161e78f>] ? tcp_transmit_skb+0x42f/0x890
[ 3614.844442]  [<ffffffff8161ee4d>] ? tcp_write_xmit+0x19d/0xae0
[ 3614.844446]  [<ffffffff8161f7e5>] ? __tcp_push_pending_frames+0x25/0x90
[ 3614.844450]  [<ffffffff81611829>] ? tcp_sendmsg+0x119/0xdc0
[ 3614.844455]  [<ffffffff8110f3c0>] ? __pollwait+0x110/0x110
[ 3614.844459]  [<ffffffff81590882>] ? sock_sendmsg+0x62/0x90
[ 3614.844463]  [<ffffffff811181b8>] ? fget_light+0x48/0x100
[ 3614.844466]  [<ffffffff8158de62>] ? sockfd_lookup_light+0x22/0x80
[ 3614.844470]  [<ffffffff8159111e>] ? SYSC_sendto+0xfe/0x150
[ 3614.844474]  [<ffffffff810fcc79>] ? vfs_read+0xf9/0x180
[ 3614.844477]  [<ffffffff810fced1>] ? SyS_read+0x71/0xa0
[ 3614.844481]  [<ffffffff8171a0a2>] ? system_call_fastpath+0x16/0x1b
[ 3614.844483] Code: 44 8b 04 25 1c b0 00 00 0f 1f 00 0f ae e8 0f 31 89 c6 eb 24 0f 1f 00 65 ff 0c 25 20 b8 00 00 74 36 f3 90 65 ff 04 25 20 b8 00 00 <65> 8b 0c 25 1c b0 00 00 41 39 c8 75 40 0f 1f 00 0f ae e8 0f 31
[ 3614.844517] NMI backtrace for cpu 2
[ 3614.844520] CPU: 2 PID: 489 Comm: khubd Not tainted 3.13.0-rc8 #2
[ 3614.844521] Hardware name: Dell Inc.          Dell System XPS L321X/085X6F, BIOS A08 01/22/2013
[ 3614.844524] task: ffff88011b8e4560 ti: ffff88011ba70000 task.ti: ffff88011ba70000
[ 3614.844525] RIP: 0010:[<ffffffff81048d3a>]  [<ffffffff81048d3a>] run_timer_softirq+0x9a/0x210
[ 3614.844530] RSP: 0018:ffff88011fb03ed8  EFLAGS: 00000086
[ 3614.844532] RAX: ffff88011b8f0428 RBX: ffff88011b8f0000 RCX: ffff88011fb03ee8
[ 3614.844534] RDX: ffff88011b8f0400 RSI: ffff88011fb03ea0 RDI: ffff88011b8f0000
[ 3614.844536] RBP: 0000000000000040 R08: 0000000000000017 R09: 0000000000000101
[ 3614.844538] R10: 000000000000080d R11: 0000000000000000 R12: ffff88011fb03ee8
[ 3614.844540] R13: ffff88011b8f1028 R14: ffff88011b8f1428 R15: ffff88011b13d800
[ 3614.844542] FS:  0000000000000000(0000) GS:ffff88011fb00000(0000) knlGS:0000000000000000
[ 3614.844544] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 3614.844546] CR2: 00007f11c53cd010 CR3: 0000000001981000 CR4: 00000000000407e0
[ 3614.844547] Stack:
[ 3614.844549]  ffff88011b8f1828 ffff88011b8f1c28 ffff88011fb03ee8 ffff88011fb03ee8
[ 3614.844552]  ffff88011fb0cd00 0000000000000141 0000000000000001 0000000000000002
[ 3614.844555]  0000000000000101 0000000000000001 ffffffff8197a088 ffffffff81042c3c
[ 3614.844558] Call Trace:
[ 3614.844559]  <IRQ>

[ 3614.844564]  [<ffffffff81042c3c>] ? __do_softirq+0xcc/0x1d0
[ 3614.844567]  [<ffffffff81042fa5>] ? irq_exit+0x55/0x60
[ 3614.844571]  [<ffffffff8102a6db>] ? smp_apic_timer_interrupt+0x3b/0x50
[ 3614.844575]  [<ffffffff8171ac4a>] ? apic_timer_interrupt+0x6a/0x70
[ 3614.844576]  <EOI>

[ 3614.844580]  [<ffffffff817148d5>] ? _raw_spin_unlock_irqrestore+0x5/0x20
[ 3614.844587]  [<ffffffffa000b381>] ? xhci_cancel_cmd+0x181/0x1c0 [xhci_hcd]
[ 3614.844592]  [<ffffffffa00055d5>] ? xhci_address_device+0x375/0x410 [xhci_hcd]
[ 3614.844597]  [<ffffffff814a218c>] ? hub_port_init+0x22c/0xa10
[ 3614.844601]  [<ffffffff813e547d>] ? rpm_idle+0x1d/0x1e0
[ 3614.844606]  [<ffffffff814a3a8d>] ? hub_thread+0x59d/0x12f0
[ 3614.844611]  [<ffffffff8171139b>] ? __schedule+0x27b/0x6a0
[ 3614.844616]  [<ffffffff81071460>] ? finish_wait+0x90/0x90
[ 3614.844620]  [<ffffffff814a34f0>] ? usb_port_resume+0x3e0/0x3e0
[ 3614.844624]  [<ffffffff8105ba3c>] ? kthread+0xbc/0xe0
[ 3614.844628]  [<ffffffff81060000>] ? commit_creds+0x140/0x210
[ 3614.844632]  [<ffffffff8105b980>] ? flush_kthread_worker+0x80/0x80
[ 3614.844635]  [<ffffffff81719ffc>] ? ret_from_fork+0x7c/0xb0
[ 3614.844639]  [<ffffffff8105b980>] ? flush_kthread_worker+0x80/0x80
[ 3614.844641] Code: 28 14 00 00 0f 1f 44 00 00 48 89 d5 81 e5 ff 00 00 00 0f 84 09 01 00 00 48 83 43 10 01 48 89 ea 48 c1 e2 04 48 01 da 48 8d 42 28 <48> 8b 4a 28 4c 89 61 08 48 89 4c 24 10 48 8b 4a 30 48 89 4c 24
[ 3614.844673] NMI backtrace for cpu 0
[ 3614.844678] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.13.0-rc8 #2
[ 3614.844680] Hardware name: Dell Inc.          Dell System XPS L321X/085X6F, BIOS A08 01/22/2013
[ 3614.844682] task: ffffffff819864a0 ti: ffffffff81976000 task.ti: ffffffff81976000
[ 3614.844684] RIP: 0010:[<ffffffff8106b130>]  [<ffffffff8106b130>] enqueue_task_fair+0x800/0xad0
[ 3614.844691] RSP: 0018:ffff88011fa03bf0  EFLAGS: 00000046
[ 3614.844693] RAX: 0000000000000000 RBX: ffff88007db7ef68 RCX: 00000349a58f00ed
[ 3614.844695] RDX: 0000000000000000 RSI: 0000033d64af00ed RDI: 0000000000000001
[ 3614.844697] RBP: ffff88011fa119e0 R08: ffff88011b804698 R09: 0000000000000001
[ 3614.844699] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88011fa11980
[ 3614.844700] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001
[ 3614.844703] FS:  0000000000000000(0000) GS:ffff88011fa00000(0000) knlGS:0000000000000000
[ 3614.844705] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 3614.844707] CR2: 00007f833f07c000 CR3: 00000000acebf000 CR4: 00000000000407f0
[ 3614.844708] Stack:
[ 3614.844710]  0000000030dbcc00 0000000000000046 ffff88011fa11980 ffff88011fa11980
[ 3614.844714]  0000000000000005 ffff88007db7ef00 ffff88011fa11980 ffff88007db7f44a
[ 3614.844717]  0000000000000046 0000000000000000 0000000000000000 ffffffff810639a5
[ 3614.844720] Call Trace:
[ 3614.844722]  <IRQ>

[ 3614.844728]  [<ffffffff810639a5>] ? ttwu_do_activate.constprop.87+0x35/0x70
[ 3614.844731]  [<ffffffff81065d36>] ? try_to_wake_up+0x216/0x2a0
[ 3614.844735]  [<ffffffff8128a28a>] ? timerqueue_del+0x2a/0x80
[ 3614.844738]  [<ffffffff8105df00>] ? update_rmtp+0x60/0x60
[ 3614.844741]  [<ffffffff8105df1d>] ? hrtimer_wakeup+0x1d/0x30
[ 3614.844745]  [<ffffffff8105e0de>] ? __run_hrtimer.isra.31+0x4e/0xe0
[ 3614.844748]  [<ffffffff8105e705>] ? hrtimer_interrupt+0xf5/0x250
[ 3614.844753]  [<ffffffff8102a6d6>] ? smp_apic_timer_interrupt+0x36/0x50
[ 3614.844757]  [<ffffffff8171ac4a>] ? apic_timer_interrupt+0x6a/0x70
[ 3614.844761]  [<ffffffff817148d5>] ? _raw_spin_unlock_irqrestore+0x5/0x20
[ 3614.844767]  [<ffffffffa0010724>] ? xhci_hub_status_data+0x194/0x1f0 [xhci_hcd]
[ 3614.844772]  [<ffffffff814a6cf0>] ? usb_add_hcd+0x740/0x740
[ 3614.844776]  [<ffffffff814a64a1>] ? usb_hcd_poll_rh_status+0x51/0x160
[ 3614.844780]  [<ffffffff814a6cf0>] ? usb_add_hcd+0x740/0x740
[ 3614.844784]  [<ffffffff8104896e>] ? call_timer_fn.isra.31+0x1e/0x90
[ 3614.844788]  [<ffffffff814a6cf0>] ? usb_add_hcd+0x740/0x740
[ 3614.844792]  [<ffffffff81048e20>] ? run_timer_softirq+0x180/0x210
[ 3614.844796]  [<ffffffff81042c3c>] ? __do_softirq+0xcc/0x1d0
[ 3614.844799]  [<ffffffff81042fa5>] ? irq_exit+0x55/0x60
[ 3614.844803]  [<ffffffff8102a6db>] ? smp_apic_timer_interrupt+0x3b/0x50
[ 3614.844807]  [<ffffffff8171ac4a>] ? apic_timer_interrupt+0x6a/0x70
[ 3614.844808]  <EOI>

[ 3614.844814]  [<ffffffff815032a6>] ? cpuidle_enter_state+0x56/0xe0
[ 3614.844817]  [<ffffffff815032a2>] ? cpuidle_enter_state+0x52/0xe0
[ 3614.844821]  [<ffffffff81711427>] ? __schedule+0x307/0x6a0
[ 3614.844825]  [<ffffffff81504581>] ? ladder_select_state+0x31/0x1e0
[ 3614.844829]  [<ffffffff815033bf>] ? cpuidle_idle_call+0x8f/0x130
[ 3614.844834]  [<ffffffff8100a779>] ? arch_cpu_idle+0x9/0x30
[ 3614.844837]  [<ffffffff81077981>] ? cpu_startup_entry+0x61/0x170
[ 3614.844841]  [<ffffffff81a1bdbc>] ? start_kernel+0x3a4/0x3af
[ 3614.844844]  [<ffffffff81a1b82f>] ? repair_env_string+0x5b/0x5b
[ 3614.844846] Code: 45 58 e8 a4 db ff ff 48 89 de 48 89 ef e8 a9 d9 ff ff 48 89 ef e8 61 ef ff ff 45 85 ff 0f 85 b6 f9 ff ff e9 e0 f9 ff ff 0f 1f 00 <48> c7 45 60 00 00 00 00 e9 47 f8 ff ff 31 c0 e9 85 fa ff ff 48
[ 3614.844880] NMI backtrace for cpu 1
[ 3614.844883] CPU: 1 PID: 6155 Comm: jackd Not tainted 3.13.0-rc8 #2
[ 3614.844885] Hardware name: Dell Inc.          Dell System XPS L321X/085X6F, BIOS A08 01/22/2013
[ 3614.844967] task: ffff8800b0ca3090 ti: ffff88011a45e000 task.ti: ffff88011a45e000
[ 3614.844968] RIP: 0010:[<ffffffff810015c0>]  [<ffffffff810015c0>] __switch_to+0x2f0/0x4b0
[ 3614.844979] RSP: 0018:ffff8800a5cdf898  EFLAGS: 00000046
[ 3614.844981] RAX: 00000000ffffffff RBX: ffff8800b0ca3090 RCX: 0000000000000000
[ 3614.844982] RDX: 00000000ffffffff RSI: ffff88011ba86f00 RDI: ffff8800a5e03740
[ 3614.844984] RBP: ffff88011fa8ee40 R08: 0000000000000000 R09: 0000000000000001
[ 3614.844985] R10: 0000000000000007 R11: 0a64657461766974 R12: 0000000000000001
[ 3614.844988] R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000
[ 3614.844990] FS:  00007f6cc0639700(0000) GS:ffff88011fa80000(0000) knlGS:0000000000000000
[ 3614.844992] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 3614.844993] CR2: 00007f11c57f3000 CR3: 00000000a5ef5000 CR4: 00000000000407e0
[ 3614.844994] Stack:
[ 3614.844996]  ffff88011fa91980 0000000100000001 ffff88011fa91980 ffff88011ba86f00
[ 3614.844999]  ffff8800abf92700 0000000000000001 ffff88011a45fbac ffffffff81711359
[ 3614.845002]  ffff88011ba86f00 0000000000000082 ffff88011b88c560 ffffffff8105e199
[ 3614.845004] Call Trace:
[ 3614.845008] Code: e9 d3 fd ff ff 66 0f 1f 44 00 00 0f 1f 84 00 00 00 00 00 66 90 66 90 b8 ff ff ff ff 48 8b be 78 04 00 00 31 c9 89 c2 48 0f ae 2f <85> c9 0f 84 a2 fe ff ff 66 66 90 66 90 66 66 90 66 90 83 c8 ff
[ 3614.845038] [sched_delayed] sched: RT throttling activated
[ 3614.846438] xhci_hcd 0000:02:00.0: HC died; cleaning up
[ 3620.045581] xhci_hcd 0000:02:00.0: Timeout while waiting for address device command
[ 3620.045590] xhci_hcd 0000:02:00.0: Abort the command ring, but the xHCI is dead.
[ 3620.246415] usb 4-1: device not accepting address 40, error -108
[ 3625.242731] xhci_hcd 0000:02:00.0: Timeout while waiting for a slot
[ 3625.242742] xhci_hcd 0000:02:00.0: Abort the command ring, but the xHCI is dead.
[ 3630.239081] xhci_hcd 0000:02:00.0: Timeout while waiting for a slot
[ 3630.239092] xhci_hcd 0000:02:00.0: Abort the command ring, but the xHCI is dead.
[ 3635.235383] xhci_hcd 0000:02:00.0: Timeout while waiting for a slot
[ 3635.235392] xhci_hcd 0000:02:00.0: Abort the command ring, but the xHCI is dead.