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From: Jan Kiszka <jan.kiszka@web.de>
To: Alexander Spyridakis <a.spyridakis@virtualopensystems.com>
Cc: qemu-devel <qemu-devel@nongnu.org>, kvm <kvm@vger.kernel.org>,
	kvmarm <kvmarm@lists.cs.columbia.edu>,
	Anup Patel <anup@brainfault.org>
Subject: Re: vexpress: Framebuffer broken with KVM enabled
Date: Mon, 16 Feb 2015 11:04:10 +0100	[thread overview]
Message-ID: <54E1C09A.7030002@web.de> (raw)
In-Reply-To: <CAJRNFKLG2k6+4v2p-A22v36TLFX=djkx9cH1wK_qAcQ0M_vCoQ@mail.gmail.com>

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On 2015-02-16 10:34, Alexander Spyridakis wrote:
> On Mon, Feb 16, 2015 at 2:43 PM, Jan Kiszka <jan.kiszka@web.de> wrote:
>> Hi,
>>
>> next issue related to KVM/QEMU on the TK1: The guest image I'm running
>> gives proper framebuffer output when in emulation mode. Once KVM is
>> enabled, the screen is - at best - only initially updated. Sometimes I
>> see the famous tux images and a bit of the console texts, but usually it
>> stays black. Explanations?
> 
> Hello Jan,
> 
> If you want to force rendering, you can do something similar with the
> following hack:
> https://github.com/virtualopensystems/qemu/commit/64dd1b3e3a2353433edb9c63d00271f515bd06fb
> 
> Of course expect performance to not be up to par.

Yep, confirmed - both that it works and that it's slow (better not try
this with SDL, exported via X...).

Thanks,
Jan



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WARNING: multiple messages have this Message-ID (diff)
From: Jan Kiszka <jan.kiszka@web.de>
To: Alexander Spyridakis <a.spyridakis@virtualopensystems.com>
Cc: Anup Patel <anup@brainfault.org>,
	qemu-devel <qemu-devel@nongnu.org>, kvm <kvm@vger.kernel.org>,
	kvmarm <kvmarm@lists.cs.columbia.edu>
Subject: Re: [Qemu-devel] vexpress: Framebuffer broken with KVM enabled
Date: Mon, 16 Feb 2015 11:04:10 +0100	[thread overview]
Message-ID: <54E1C09A.7030002@web.de> (raw)
In-Reply-To: <CAJRNFKLG2k6+4v2p-A22v36TLFX=djkx9cH1wK_qAcQ0M_vCoQ@mail.gmail.com>

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On 2015-02-16 10:34, Alexander Spyridakis wrote:
> On Mon, Feb 16, 2015 at 2:43 PM, Jan Kiszka <jan.kiszka@web.de> wrote:
>> Hi,
>>
>> next issue related to KVM/QEMU on the TK1: The guest image I'm running
>> gives proper framebuffer output when in emulation mode. Once KVM is
>> enabled, the screen is - at best - only initially updated. Sometimes I
>> see the famous tux images and a bit of the console texts, but usually it
>> stays black. Explanations?
> 
> Hello Jan,
> 
> If you want to force rendering, you can do something similar with the
> following hack:
> https://github.com/virtualopensystems/qemu/commit/64dd1b3e3a2353433edb9c63d00271f515bd06fb
> 
> Of course expect performance to not be up to par.

Yep, confirmed - both that it works and that it's slow (better not try
this with SDL, exported via X...).

Thanks,
Jan



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  reply	other threads:[~2015-02-16 10:04 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-02-16  9:13 vexpress: Framebuffer broken with KVM enabled Jan Kiszka
2015-02-16  9:13 ` [Qemu-devel] " Jan Kiszka
2015-02-16  9:20 ` Anup Patel
2015-02-16  9:20   ` [Qemu-devel] " Anup Patel
2015-02-16  9:26   ` Jan Kiszka
2015-02-16  9:26     ` [Qemu-devel] " Jan Kiszka
2015-02-16  9:34   ` Alexander Spyridakis
2015-02-16  9:34     ` [Qemu-devel] " Alexander Spyridakis
2015-02-16 10:04     ` Jan Kiszka [this message]
2015-02-16 10:04       ` Jan Kiszka

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