From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rodrigo Campos Subject: Re: Serial Port Driver does not handle interrupt Date: Tue, 17 Nov 2009 15:40:09 -0300 Message-ID: <20091117184009.GB26817@debian> References: <4AF83B47.9030405@rdsoftware.de> <4B01D9B4.3080607@rdsoftware.de> <20091116232753.GB11762@debian> <4B02E4D8.5040103@rdsoftware.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: "kvm@vger.kernel.org" To: Erik Rull Return-path: Received: from alerce.vps.bitfolk.com ([212.13.194.134]:3719 "EHLO alerce.vps.bitfolk.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755167AbZKQSkq (ORCPT ); Tue, 17 Nov 2009 13:40:46 -0500 Content-Disposition: inline In-Reply-To: <4B02E4D8.5040103@rdsoftware.de> Sender: kvm-owner@vger.kernel.org List-ID: 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