From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:58088) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aluth-0001EG-8x for qemu-devel@nongnu.org; Fri, 01 Apr 2016 04:57:42 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1alute-0002wP-0L for qemu-devel@nongnu.org; Fri, 01 Apr 2016 04:57:41 -0400 Received: from mx1.redhat.com ([209.132.183.28]:50564) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1alutd-0002wL-R6 for qemu-devel@nongnu.org; Fri, 01 Apr 2016 04:57:37 -0400 Date: Fri, 1 Apr 2016 09:57:34 +0100 From: "Richard W.M. Jones" Message-ID: <20160401085734.GH32728@redhat.com> References: <20160319203124.GB19398@redhat.com> <20160331092125.GH32185@stefanha-x1.localdomain> <20160331162222.GA17533@morn.lan> <20160331221039.GA32728@redhat.com> <20160331221730.GA5637@redhat.com> <20160331224432.GA4583@morn.lan> <20160401075521.GB32728@redhat.com> <56FE2B3E.6030606@redhat.com> <20160401084747.GG32728@redhat.com> <56FE3693.2070503@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <56FE3693.2070503@redhat.com> Subject: Re: [Qemu-devel] Why is SeaBIOS used with -kernel? List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Paolo Bonzini Cc: marc.mari.barcelo@gmail.com, Stefan Hajnoczi , Kevin O'Connor , qemu-devel@nongnu.org On Fri, Apr 01, 2016 at 10:51:31AM +0200, Paolo Bonzini wrote: > > > On 01/04/2016 10:47, Richard W.M. Jones wrote: > > It's so we can handle error reports. When someone reports that > > libguestfs "hangs", it's sometimes useful to know if the BIOS was > > entered or not, since it points the finger at either qemu, BIOS or > > kernel. (Remember we have to be able to run on a whole variety of > > Linux distros which often have old/broken/random qemu/bios/kernel). > > Sure, but that can be an extra option if sgabios adds overhead. > > Anyhow, you probably want "-vga none" too. That's the qemu option? Currently we use -nodefconfig -nodefaults -display none which I assumed would do the same thing (ie. not add any default devices). Does -vga none do more than this? Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com virt-builder quickly builds VMs from scratch http://libguestfs.org/virt-builder.1.html