Received: from sv26.byethost26.org (sv26.byethost26.org [82.163.176.27])
	by nld3-dev1.alpinelinux.org (Postfix) with ESMTPS id 8C8F8781958
	for <~alpine/users@lists.alpinelinux.org>; Tue,  3 Nov 2020 19:55:57 +0000 (UTC)
DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=obarun.org;
	 s=default; h=Content-Transfer-Encoding:Content-Type:Mime-Version:Message-Id:
	Subject:To:From:Date:Sender:Reply-To:Cc:Content-ID:Content-Description:
	Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:
	In-Reply-To:References:List-Id:List-Help:List-Unsubscribe:List-Subscribe:
	List-Post:List-Owner:List-Archive;
	bh=cJdjYJBGsOXKFB6XYCzISq++TmOPnEaoEj4x43Y7uuc=; b=WbNjmSY8RfWyyEyfePbMtujcCB
	UntWbLnwznlvzkMZEjvHqw94QIMweUMmZ5aFOqkYTPffj/3SWfR23XVI9uqyp9q4y9tmvbVF04i+q
	7iuhD4SY6D8AKybMK+sAahiwrIUglQZEkgxAYmaNUTZM+z6ALnPpoqd8Kh5DtropWgDnDF8kufJjK
	RW74ILJj6EfPYQCxt6132kY/HGgV9sy/t2alqWwYCCeWZib1P3w0X6etelEyflFbXM/u1SMJDgpbW
	FnqD8X/Q4sxkDIFBXCg+ItM/qzacxhJ5Z5b+ua08oFEmY/eCJ0dZAGA5VkOKAK4Qhnqf3Quz6etZt
	CQZ0wu1w==;
Received: from host-115-126-165-174.fibre.nautile.nc ([115.126.165.174]:49942 helo=S6.localdomain)
	by sv26.byethost26.org with esmtpsa  (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
	(Exim 4.93)
	(envelope-from <eric@obarun.org>)
	id 1ka2PL-00015e-Fx
	for ~alpine/users@lists.alpinelinux.org; Tue, 03 Nov 2020 14:55:56 -0500
Date: Wed, 4 Nov 2020 06:57:31 +1100
From: eric vidal <eric@obarun.org>
To: ~alpine/users@lists.alpinelinux.org
Subject: [Raspberry] Dual screen support
Message-Id: <20201104065731.78c797c785a38d1db9dc35d5@obarun.org>
X-Mailer: Sylpheed 3.7.0 (GTK+ 2.24.32; x86_64-unknown-linux-gnu)
Mime-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
X-AntiAbuse: This header was added to track abuse, please include it with any abuse report
X-AntiAbuse: Primary Hostname - sv26.byethost26.org
X-AntiAbuse: Original Domain - lists.alpinelinux.org
X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12]
X-AntiAbuse: Sender Address Domain - obarun.org
X-Get-Message-Sender-Via: sv26.byethost26.org: authenticated_id: eric@obarun.org
X-Authenticated-Sender: sv26.byethost26.org: eric@obarun.org
X-Source: 
X-Source-Args: 
X-Source-Dir: 


Hi,

I have installed Alpine on a raspberry Pi4 model B. I did a classic sys installation on it with xfce4 as Desktop. All packages was installed from main repositories (no edge) and i took the last aarch64 image available from the Alpine site.
The system boot well, Xorg work correctly and the Desktop too.

But, i have trouble with dual screen. The first hdmi port (the nearest of the power supply) works as expected and correctly detected by the system but the second one doesn't work. It display a rainbow screen.

I try to see if it's detected by tool like /opt/vc/bin/tvservice but without any success. I try to configure the second hdmi by the boot/config.txt file, but again without any success. I thought that can be a missing modules to load earlier at boot time by the cmdline.txt file but i don't know which module can cause the trouble.

So, it will be very appreciated if someone have a piste to follow to share.
-- 
eric vidal <eric@obarun.org>