[29504.804829] irq 18: nobody cared (try booting with the "irqpoll" option)
[29504.804835] Pid: 0, comm: kworker/0:1 Tainted: P         C  3.0.0-17-generic #30-Ubuntu
[29504.804838] Call Trace:
[29504.804840]  <IRQ>  [<ffffffff810cfc9d>] __report_bad_irq+0x3d/0xe0
[29504.804851]  [<ffffffff810cff25>] note_interrupt+0x135/0x180
[29504.804855]  [<ffffffff810cdec9>] handle_irq_event_percpu+0xa9/0x220
[29504.804859]  [<ffffffff810ce08e>] handle_irq_event+0x4e/0x80
[29504.804863]  [<ffffffff810d0854>] handle_fasteoi_irq+0x64/0xf0
[29504.804866]  [<ffffffff8100c252>] handle_irq+0x22/0x40
[29504.804872]  [<ffffffff815fcdaa>] do_IRQ+0x5a/0xe0
[29504.804876]  [<ffffffff815f33d3>] common_interrupt+0x13/0x13
[29504.804878]  <EOI>  [<ffffffff8134b29b>] ? intel_idle+0xcb/0x120
[29504.804885]  [<ffffffff8134b27d>] ? intel_idle+0xad/0x120
[29504.804890]  [<ffffffff814b387d>] cpuidle_idle_call+0x9d/0x280
[29504.804896]  [<ffffffff8100920b>] cpu_idle+0xab/0x100
[29504.804901]  [<ffffffff815d5371>] start_secondary+0xd9/0xdb
[29504.804904] handlers:
[29504.804917] [<ffffffffa009a2a0>] rtl8169_interrupt
[29504.804920] Disabling IRQ #18