port-arm/53042: Raspberry pi GPU programs fails with "* failed to add service - already in use?"

[michael.blatt%gmail.com@localhost]

>Number:         53042
>Category:       port-arm
>Synopsis:       Raspberry pi GPU programs fails with "* failed to add service - already in use?"
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    port-arm-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Feb 20 12:55:01 +0000 2018
>Originator:     Michael Blatt
>Release:        NetBSD 8.99.12 pkgsrc 2017_Q4
>Organization:
>Environment:
>Description:
I can't get any program to run that tries to use GPU acceleration on
my RPI 1b rev2 (earmv6hf).
Tried this with both a self-built image and Jun's latest image (so 8.99.12),

Even hello_triangle.bin under /usr/pkg/src (not /usr/pkgsrc), part of
raspberrypi-userland, returns this error when run:

 * failed to add service - already in use?

With Linux this error message has historically been caused by firmware
issues, or a suboptimal gpu_mem split. I've tried gpu_mem=32, 64, 128
and even 256, to no avail.
I've also swapped the firmware for older versions that I've been using
on my RPI2 with NetBSD (same version).
>How-To-Repeat:
1. download raspberrypi image 

http://cdn.netbsd.org/pub/NetBSD/misc/jun/raspberry-pi/2018-02-11-earmv6hf/2018-02-11-netbsd-raspi-earmv6hf.img.gz
http://mail-index.netbsd.org/port-arm/2018/02/06/msg004579.html

or the build server images (earmv6hf or earmv7hf)

2. copy to microsd

gunzip < 2018-02-11-netbsd-raspi-earmv6hf.img.gz |dd of=/dev/rsd0d bs=4m

3. setup Raspberry PI 0/1/2/3
- microsd card
- connect HDMI
- USB keyboard

4. extract pkgsrc 2017_Q4

5. build misc/raspberrypi-userland

6. build hello_triangle from /usr/pkg/src/hello_pi/ or any other example program that uses 3D acceleration. Note that this needs some paths adjusted and LD_LIBRARY_PATH specified when running.
This also applies to any package that uses 3D acceleration.
>Fix:
not known