[  411.515843] irq 69: nobody cared (try booting with the "irqpoll" option)
[  411.522678] [<c00521bc>] (unwind_backtrace+0x0/0xec) from [<c043ea98>] (dump_stack+0x20/0x24)
[  411.531289] [<c043ea98>] (dump_stack+0x20/0x24) from [<c00c2ff0>] (__report_bad_irq+0x38/0xc8)
[  411.539970] [<c00c2ff0>] (__report_bad_irq+0x38/0xc8) from [<c00c34b0>] (note_interrupt+0x1a4/0x250)
[  411.549168] [<c00c34b0>] (note_interrupt+0x1a4/0x250) from [<c00c1930>] (handle_irq_event_percpu+0x1f8/0x228)
[  411.559146] [<c00c1930>] (handle_irq_event_percpu+0x1f8/0x228) from [<c00c19ac>] (handle_irq_event+0x4c/0x6c)
[  411.569127] [<c00c19ac>] (handle_irq_event+0x4c/0x6c) from [<c00c3fec>] (handle_fasteoi_irq+0xe4/0x11c)
[  411.578583] [<c00c3fec>] (handle_fasteoi_irq+0xe4/0x11c) from [<c00c104c>] (generic_handle_irq+0x3c/0x50)
[  411.588212] [<c00c104c>] (generic_handle_irq+0x3c/0x50) from [<c0046308>] (asm_do_IRQ+0x88/0xc8)
[  411.597071] [<c0046308>] (asm_do_IRQ+0x88/0xc8) from [<c004b9b8>] (__irq_svc+0x38/0xc0)
[  411.605111] Exception stack(0xe8d6dd30 to 0xe8d6dd78)
[  411.610202] dd20:                                     00000000 00000045 00000000 c066eae0
[  411.618432] dd40: e8d6c000 00000040 00000045 f5324c01 00000000 f5bb5000 c06b90c8 e8d6ddbc
[  411.626656] dd60: e8d6ddc0 e8d6dd78 c0084584 c0083f88 20000113 ffffffff
[  411.633354] [<c004b9b8>] (__irq_svc+0x38/0xc0) from [<c0083f88>] (__do_softirq+0x68/0x230)
[  411.641687] [<c0083f88>] (__do_softirq+0x68/0x230) from [<c0084584>] (irq_exit+0x58/0xa8)
[  411.649923] [<c0084584>] (irq_exit+0x58/0xa8) from [<c004630c>] (asm_do_IRQ+0x8c/0xc8)
[  411.657900] [<c004630c>] (asm_do_IRQ+0x8c/0xc8) from [<c004b9b8>] (__irq_svc+0x38/0xc0)
[  411.665936] Exception stack(0xe8d6ddf0 to 0xe8d6de38)
[  411.671025] dde0:                                     c06b90c8 60000013 00000000 00000000
[  411.679257] de00: 60000013 f5bb5000 60000013 f5324c01 00000000 f5bb5000 c06b90c8 e8d6de4c
[  411.687483] de20: e8d6de38 e8d6de38 c0444cf0 c0444cf4 60000013 ffffffff
[  411.694161] [<c004b9b8>] (__irq_svc+0x38/0xc0) from [<c0444cf4>] (_raw_spin_unlock_irqrestore+0x20/0x24)
[  411.703720] [<c0444cf4>] (_raw_spin_unlock_irqrestore+0x20/0x24) from [<c028b64c>] (uart_start+0x40/0x44)
[  411.713356] [<c028b64c>] (uart_start+0x40/0x44) from [<c028cd94>] (uart_write+0xec/0xfc)
[  411.721513] [<c028cd94>] (uart_write+0xec/0xfc) from [<c0276dbc>] (n_tty_write+0x24c/0x3b4)
[  411.729958] [<c0276dbc>] (n_tty_write+0x24c/0x3b4) from [<c02740a0>] (tty_write+0x198/0x248)
[  411.738486] [<c02740a0>] (tty_write+0x198/0x248) from [<c0122f6c>] (vfs_write+0xc4/0x140)
[  411.746731] [<c0122f6c>] (vfs_write+0xc4/0x140) from [<c01231e8>] (sys_write+0x4c/0x78)
[  411.754805] [<c01231e8>] (sys_write+0x4c/0x78) from [<c004be00>] (ret_fast_syscall+0x0/0x30)
[  411.763271] handlers:
[  411.765582] [<c0290054>] serial8250_interrupt
[  411.769979] Disabling IRQ #69