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Re: [Xen-devel] Xen 4 serial hangs during boot

On 7/20/12 3:31 PM, Keir Fraser wrote:
Somehow dom0 disabled the serial-line interrupt during boot. Possibly it
appeared as a PnP device in some BIOS table and dom0 decided to disable it
because it doesn't think it is being used. Xen would usually stop this
happening via programming of the IO-APIC/XT-PIC but perhaps there is some
other method of disabling it on this mainboard, which Xen doesn't catch.

Hmm -- except dom0 hasn't even booted yet at the time the serial stops working. Xen is 30-60 seconds away from booting dom0 given the RAM scrub still has to happen.


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