Created attachment 68902 [details]
kernel configuration

i've been using 3.0.1 for some time, but today after booting my usb keyboard transmitted only about one key stroke per second. looking at the dmesg output, it showed me:

[   14.726028] irq 16: nobody cared (try booting with the "irqpoll" option)
[   14.726032] Pid: 46, comm: irq/16-uhci_hcd Tainted: P            3.0.1 #12
[   14.726035] Call Trace:
[   14.726042]  [<ffffffff810cb936>] __report_bad_irq+0x36/0xd0
[   14.726045]  [<ffffffff810cbd56>] note_interrupt+0x136/0x1f0
[   14.726049]  [<ffffffff81062c07>] ? local_bh_enable+0x57/0xc0
[   14.726052]  [<ffffffff810caa90>] ? irq_thread_fn+0x50/0x50
[   14.726054]  [<ffffffff810caa0f>] irq_thread+0x1af/0x1e0
[   14.726057]  [<ffffffff810ca860>] ? irq_finalize_oneshot+0x110/0x110
[   14.726060]  [<ffffffff8107e83c>] kthread+0x8c/0xa0
[   14.726065]  [<ffffffff815d33a4>] kernel_thread_helper+0x4/0x10
[   14.726068]  [<ffffffff8107e7b0>] ? kthread_worker_fn+0x190/0x190
[   14.726071]  [<ffffffff815d33a0>] ? gs_change+0x13/0x13
[   14.726072] handlers:
[   14.726074] [<ffffffff810ca090>] irq_default_primary_handler threaded [<ffffffff8142fd80>] usb_hcd_irq
[   14.726080] [<ffffffff810ca090>] irq_default_primary_handler threaded [<ffffffffa001dce0>] ahci_interrupt
[   14.726093] [<ffffffff810ca090>] irq_default_primary_handler threaded [<ffffffffa1baea40>] snd_hdsp_interrupt
[   14.726098] Disabling IRQ #16

unfortunately, on this interrupt there are 3 devices of different subsystems (audio, usb, ahci), and
i cannot reproduce this problem. after rebooting the machine works fine again.
nevertheless it may show that there is a problem somewhere ...

kernel configuration attached,

hth, tim