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From: Programmingkid <programmingkidx@gmail.com>
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Date: Thu, 5 Jul 2018 22:41:43 -0400
Subject: [Qemu-devel] VGA cirrus patch prevents video output
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To: David Gibson <david@gibson.dropbear.id.au>, mail@sebastianbauer.info
Cc: "list@suse.de:PowerPC list:PowerPC" <qemu-ppc@nongnu.org>, QEMU Developers <qemu-devel@nongnu.org>

I noticed that the video in QEMU stopped working. When I start =
qemu-system-ppc all I see is a black window. Not even OpenBIOS displays =
anything. After some bisecting I found out it was this patch that causes =
the problem:=20

Commit 29f9cef39eb1ae55e82c6763eb22d7a1bdff7276
Author: Sebastian Bauer <mail@sebastianbauer.info>
Date:   Mon Jul 2 21:13:45 2018 +0200

    ppc: Include vga cirrus card into the compiling process
   =20
    Drivers for this card exists on PPC-based AmigaOS guests so it is =
useful to
    allow users to emulate the graphics card for PPC machines.
   =20
    As cirrus vga is currently preferred over std(vga) in absence of any =
user
    choice, this change also sets the default display of spapr machines =
to
    std as otherwise qemu refuses to start these machines. Not =
specifying an
    explicit graphics mode is for instance done by 'make check'.
   =20
    Signed-off-by: Sebastian Bauer <mail@sebastianbauer.info>
    Signed-off-by: David Gibson <david@gibson.dropbear.id.au>


I think a solution to this problem might be to have the mac99 machine =
use "-vga std" as default. When I use -vga std, video works again.=