AFAIU support for pulling in dtbs from the kernel snap is already in
snapd. We've recently also fixed a problem with AppArmor profile that
blocked access to the GPU device, perhaps that's related. The PR that
contains the fix is https://github.com/snapcore/snapd/pull/11822
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Can you please pull the latest pi kernel and gadget from 20/stable,
snapd from edge and verify if things are working for you?
** Changed in: snapd
Status: New => Incomplete
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@juergh do I understand it correctly that this is blocked on snapd
pulling dtbs from the kernel snap?
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https://bugs.launchpad.net/bugs/1905272
Title:
Can't get h/w video acceleration
This is gated by snapd work. I don't have visibility into the snap
team's schedule.
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Title:
Can't get h/w video acceleration on rpi4
To manage
@Juerg - Do you have a timeline for this?
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Title:
Can't get h/w video acceleration on rpi4
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We will fix 18 eventually (when we move the kernel to 5.4). But that
requires some snap changes that are currently in the works.
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Title:
Can't
Thanks, ogra pointed me to the /pending subdirectory for images. I installed
the latest one and gstreamer can actually detect v4l2h264 decoding capabilities
there.
Unfortunate that it does not work on 18 though.
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You can try to copy the DTBs (and overlays) from
/lib/firmware/5.4.0--raspi/device-tree/broadcom/ to /run/mnt
/ubuntu-seed after refreshing the kernel snap.
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I guess I will have to build an image with my own assertion, as ubuntu's
images are in fact from May and image does not boot if I refresh the
kernel. Will update if it does not work once I make it myself.
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** Changed in: linux-raspi (Ubuntu)
Status: New => Invalid
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Title:
Can't get h/w video acceleration on rpi4
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For UC 20 I downloaded the image from here:
https://cdimage.ubuntu.com/ubuntu-core/20/beta/current/
I tried refreshing to the edge kernel but then an image would not boot.
For 18 I had built an image from an assertion containing kernel: pi-
kernel=18-pi
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5.4.0-1011-raspi is an ancient kernel from May. How did you end up using
that? Current is 5.4.0-1022.25. With that kernel, I still had to copy
the DTBs from the kernel to make it work. So it looks like another
DTB/kernel mismatch.
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this could surely be part of it
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Title:
Can't get h/w video acceleration on rpi4
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On Core 20:
root@ubuntu:/home/pi# modprobe bcm2835_codec
modprobe: FATAL: Module bcm2835_codec not found in directory
/lib/modules/5.4.0-1011-raspi
On raspbian:
sudo modprobe bcm2835_codec
pi@raspberrypi:~ $
Google seems to be telling me that it's an element that provides video
encode, decode,
** Changed in: snapd
Importance: Undecided => High
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Title:
Can't get h/w video acceleration on rpi4
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Hi Oliver, sorry, did not mention that the difference in codecs is with
core 18 - I only tried the snap on 20 to make sure it does not work
there as well. I will check it.
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talking to juerg (our kernel maintainer) it seems the codec module
should be available in 5.4 in UC20, did you try to manually modprobe it
?
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the config option seems to be:
CONFIG_VIDEO_CODEC_BCM2835=m
** Also affects: linux-raspi (Ubuntu)
Importance: Undecided
Status: New
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