Received: from serpens.uberspace.de (serpens.uberspace.de [95.143.172.177])
	by nld3-dev1.alpinelinux.org (Postfix) with ESMTPS id 620A3782BAC
	for <~alpine/users@lists.alpinelinux.org>; Sun, 10 May 2020 05:56:07 +0000 (UTC)
Received: (qmail 27411 invoked from network); 10 May 2020 05:56:06 -0000
Received: from localhost (HELO ?IPv6:2a04:4540:104:200:91b6:e486:853c:d655?) (127.0.0.1)
  by serpens.uberspace.de with SMTP; 10 May 2020 05:56:06 -0000
To: ~alpine/users@lists.alpinelinux.org
From: alpine@wrind.de
Subject: [pi4] boots but no video
Message-ID: <b138338b-9b86-ae35-1046-13603112e350@wrind.de>
Date: Sun, 10 May 2020 07:56:04 +0200
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101
 Thunderbird/68.7.0
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Language: en-GB
Content-Transfer-Encoding: 7bit

Hi alpineusers,
I'm trying to boot a raspberrypi4 with poehat with the latest release 
3.11.6 of the raspberry pi aarch64 archive.
Microsdcard is prepared like in the wiki 
(https://wiki.alpinelinux.org/wiki/Raspberry_Pi) described.
Incase this is important, the bootloader is the 20200416 (latest stable) 
with bootorder changed to enable pxe booting.

The pi boots, after a short time the num lock can be turned on. The 
default login seem to work and a "poweroff" turns the pi off.
But I only get a black screen. The display is pluged in, the right input 
selected and doesn't go to standby.
A aditional "hdmi_safe=1" parameter in the usercfg.txt doesn't change 
anything.
Anything I am missing?

The hardware (display, cable, pioutput) works with raspian.

Any input appreciated.
Thanks for your time.
Flatterlight