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#1 2013-01-20 22:44:07

Registered: 2009-07-07
Posts: 8

USB devices lag due to unhandled interrupts on IRQ18 (pata_jmicron)

On my archlinux installation, randomly (it varies between 5 minutes and 5 hours), an interrupt is uncatched on bus IRQ18. When I type dmesg, I can read:

irq 18: nobody cared (try booting with the "irqpoll" option)
[<ffffffff811c170c>] (usb_hcd_irq+0x0/0x63)
[<ffffffff811c170c>] (usb_hcd_irq+0x0/0x63)

Booting with the irqpoll option doesn't change anything, unfortunately. In the file /proc/interrupts, the line corresponding to IRQ18 is :

18:          0          0         41      13812   IO-APIC-fasteoi   pata_jmicron, ohci_hcd:usb6, ohci_hcd:usb7, ohci_hcd:usb8, ohci_hcd:usb9

When the interrupts happen, I have approximately 1 to 2 seconds of mouse and keyboard lag (system is really unusable sad ).
If anyone has an idea on how to fix this really annoying problem, let me know smile
Thanks a lot
ps : I also had this same problem on ubuntu on my machine.


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