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SubjectVaio IRQ routing / USB problem
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

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;
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