> I had a similar problem with the USB driver assigned to IRQ19 but not receiving any
>interrupts.
>
> Perhaps someone more knowledgable can explain why linux fails under MPS1.4.
Linux is fine with MPS1.4. There are two possible causes I see
1. Some clown built a USB controller with only 4 bits of the IRQ line
writable/checkable. We've seen sound chips with that 'feature'
2. The MPS 1.4 tables in the BIOS are wrong. Remarkably common problem
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