On 30.05.2012 00:46, Aleš Nesrsta wrote:

> From my point of view it is little bit more probable the second reason.
> In this case the solution could be real implementation of interrupt
> transfers in GRUB - at least for EHCI. It may be possible even though
> GRUB is not supporting CPU interrupts but currently I have no idea/time
> to think about.

interrupt transfers have nothing to do with CPU interrupts per se. You
can check whether PCI interrupt occurred without having to enable CPU
interrupts.

-- 
Regards
Vladimir 'φ-coder/phcoder' Serbinenko