Messages in this thread Patch in this message |  | | Date | Sun, 04 Nov 2001 12:01:51 +0100 | From | Manfred Spraul <> | Subject | Vaio IRQ routing / USB problem |
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It seems that the PCI subsystem notices that all irq sources share irq 9 and reroutes interrupts. But after rerouting the interrupts it notices that something is wrong and aborts the irq change, without undoing the rerouting.
Thus the usb controller waits on irq 9, and doesn't receive the interrupts. If you play sound, you effectively poll the irq handler of the USB controller, and then you can use your mouse.
Could you apply the attached patch, reboot and post the dmesg output? And append cat /proc/interrupts.
-- Manfred--- 2.4/arch/i386/kernel/pci-irq.c Sat Nov 3 19:51:08 2001 +++ build-2.4/arch/i386/kernel/pci-irq.c Sun Nov 4 11:57:00 2001 @@ -48,6 +48,8 @@ * Search 0xf0000 -- 0xfffff for the PCI IRQ Routing Table. */ +#undef DBG +#define DBG printk static struct irq_routing_table * __init pirq_find_routing_table(void) { u8 *addr; |  |