Re: [Xen-devel] Serial console problem with Xen 3.0

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 11 Apr 2006, at 17:00, Ryan wrote:

> Hmm... I hadn't tried the latest xen-unstable with that changeset and
> you're right, it appears to work now. Is that how the ACPI tables
> specify how to disable the serial port? Or is my conclusion about ACPI
> completely unrelated to why it wasn't working?
Your analysis was mostly correct I believe. However I don't think 
pnpacpi is even explicitly disabling the device or interrupt line. It's 
calling into IO-APIC code to set up the routing entry and that code is 
deciding to mask the entry because it knows that no device driver is 
currently registered on that irq.
 -- Keir


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