From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:59500) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WCsza-0003uY-Fe for qemu-devel@nongnu.org; Mon, 10 Feb 2014 10:42:00 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1WCszU-0003FQ-KJ for qemu-devel@nongnu.org; Mon, 10 Feb 2014 10:41:54 -0500 Received: from mail-qc0-f171.google.com ([209.85.216.171]:49931) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WCszU-0003FM-Gz for qemu-devel@nongnu.org; Mon, 10 Feb 2014 10:41:48 -0500 Received: by mail-qc0-f171.google.com with SMTP id n7so10792332qcx.16 for ; Mon, 10 Feb 2014 07:41:48 -0800 (PST) Date: Mon, 10 Feb 2014 10:41:40 -0500 From: Kevin O'Connor Message-ID: <20140210154140.GC25938@morn.localdomain> References: <52F0DE0F.40507@msgid.tls.msk.ru> <20140205174406.GA26098@morn.localdomain> <20140206040442.GA5486@morn.localdomain> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20140206040442.GA5486@morn.localdomain> Subject: Re: [Qemu-devel] PC-BSD installer does not boot with 1.7.4 (bisected) List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Michael Tokarev , Gerd Hoffmann Cc: Daniele Di Proietto , seabios , qemu-devel , Julian Pidancet On Wed, Feb 05, 2014 at 11:04:42PM -0500, Kevin O'Connor wrote: > On Wed, Feb 05, 2014 at 12:44:06PM -0500, Kevin O'Connor wrote: > > On Tue, Feb 04, 2014 at 04:33:19PM +0400, Michael Tokarev wrote: > > > We have a bugreport in debian, http://bugs.debian.org/737142, > > > stating that PC-BSD does not work with seabios-1.7.4 anymore. > > > > > > I digged in, and found out that it fails only with -vga std > > > (cirrus works fine). So I bisected the issue - only changing > > > vgabios-stdvga.bin, and found this: > [...] > > This seems to be similar to the freebsd problem reported last year - > > see: > > http://lists.gnu.org/archive/html/qemu-stable/2013-03/msg00037.html > [...] > > (*) The best I can think of is to try and construct some hand crafted > > assembler that can catch buggy x86emu emulators and force a failure.. > > I have put together some assember to try and run-time test for known > broken versions of x86emu. This patch to SeaVGABIOS does seem to > catch the freebsd issue and in my tests it convinces freebsd to take a > different approach. The patch is a bit ugly though. There hasn't been much comment, but I have pushed this patch to the main seabios repo for now. -Kevin