On Fri, Nov 25, 2016 at 02:53:00PM -0200, Rogério Brito wrote: > Here is part from /proc/interrupts that contains interrupt 18 *without* irqpoll: > > --------------------------- > CPU0 CPU1 CPU2 CPU3 > 0: 47 0 0 0 IO-APIC 2-edge timer > 1: 0 0 0 2 IO-APIC 1-edge i8042 > 7: 0 0 0 0 IO-APIC 7-edge parport0 > 8: 0 0 0 1 IO-APIC 8-edge rtc0 > 9: 0 0 0 0 IO-APIC 9-fasteoi acpi > 10: 0 0 0 0 IO-APIC 10-edge radeon > 12: 0 0 0 4 IO-APIC 12-edge i8042 > 16: 0 96 4 990 IO-APIC 16-fasteoi ohci_hcd:usb3, ohci_hcd:usb4, snd_hda_intel:card0 > 17: 0 2457 1 140 IO-APIC 17-fasteoi ehci_hcd:usb1 > 18: 1 11 43 99947 IO-APIC 18-fasteoi ohci_hcd:usb5, ohci_hcd:usb6, ohci_hcd:usb7 Can you connect the printer to a different port so that it doesn't use OCHI to see if it makes any difference? > 19: 0 0 0 0 IO-APIC 19-fasteoi ehci_hcd:usb2 > 22: 0 22169 139 8731 IO-APIC 22-fasteoi ahci[0000:00:11.0] > 25: 0 0 11 753 PCI-MSI 1048576-edge eth0 > (...) > --------------------------- -- Regards/Gruss, Boris. Good mailing practices for 400: avoid top-posting and trim the reply. -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html