Re: Serial Port Driver does not handle interrupt

[Rodrigo Campos <rodrigo@sdfg.com.ar>]

On Tue, Nov 17, 2009 at 07:00:56PM +0100, Erik Rull wrote:
> Rodrigo Campos wrote:
> >On Tue, Nov 17, 2009 at 12:01:08AM +0100, Erik Rull wrote:
> >>Erik Rull wrote:
> >>>Any Ideas? I also tested other IRQ lines and other ttyS* on the
> >>>system - same behaviour.
> >>fixed, apic on host side was disabled, kvm / qemu seems to need it.
> >
> >I think I hit the same issue. What did you do exactly to solve it ? Enable a
> >kernel option ? May I ask which one ? :)
> >
> >Sorry, I dont have the hardware right now (so I can't play with apic options). I
> >will have it in a few weeks, so that's why I am asking :)
> >
> 
> I enabled the APIC stuff in Kernel and removed my lapic noapic boot
> parameters. APIC is enabled if you look into /proc/interrupts and
> the IRQ type is something with apic and not pc / xt.

Ahh, thanks :)

> 
> Also ensure that the IRQ line of the serial port matches those of
> your linux drivers! Otherwise the interrupt gets lost and you'll see
> some strange behaviours (Chars missing, delayed responses,...).

I will check that too.




Thanks a lot,
Rodrigo