> It is a pity Canonical is advertising super optimisations on
> Raspberry Pi 4 with 22.04 and this basic feature is totally broken
> as is: was never ever tested...

Graphical remote desktop is far from a "basic" feature, in my opinion
(an opinion bolstered by the fact it is only a recent addition to the
set of seeded packages on the desktop).

Booting, graphical session starting successfully, login operating, web
browser launching, video and audio playback working, ethernet, wifi,
and bluetooth communication working, USB peripherals functioning.
These are "basic" features. These are the sorts of things on the ISO
test list [1] that get tested on all supported Pis prior to release
and which, should they fail, will either constitute a release blocker
or, at the very least, are added to the release notes.

[1]:
http://iso.qa.ubuntu.com/qatracker/milestones/433/builds/250034/testcases

> This is a complete show-stopper for me as remote access to the
> machine, be it through SSH (which works!) or graphically, is sort of
> a necessary feature for this kind of machines.

Are you aware of X-forwarding over SSH, which incidentally works
happily on the Pi desktop images? What remote graphical functionality
do you require that is not supported by this?

> Probably some way of improvement in the QA... like suggesting
> Canonical to buy a Raspberry Pi 4 to the maintainers involved!..
> That's a pretty inexpensive machine. :-)

As I hope is clear from the above, we do have Pi 4s (quite a lot of
them, as we need to cover numerous models and board revisions), and
testing does indeed occur.

Coincidentally, though remote desktop is not on the "mandatory" list
of testing, I was aware of this bug shortly before jammy's release
(and went back and re-verified it after the release, confirming it).
However, I felt it didn't warrant inclusion on the release notes
because it's simply not "basic" functionality, and there were far more
important things that were (and in some cases still are), broken at
release time.

That said, remote desktop is (now) seeded and it would be useful to
add it to an optional list of tests to run through before release. To
that end I've opened LP: #1978113 to remind myself to write an
"optional" set of tests for the desktop images. Please feel free to
make the case (on LP: #1978113) that remote desktop should be on the
"mandatory" list of tests, if you feel it is genuinely critical
functionality (I can just about see the case for X-forwarding over
SSH; I cannot, currently, for full remote desktop).

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to gnome-remote-desktop in Ubuntu.
https://bugs.launchpad.net/bugs/1970139

Title:
  VNC Connection doesn't work on arm64 (Raspberry Pi 4 8Gb) in Ubuntu
  22.04 LTS

Status in gnome-remote-desktop package in Ubuntu:
  Fix Released

Bug description:
  # lsb_release -rd
  Description:  Ubuntu 22.04 LTS
  Release:      22.04

  # apt-cache policy gnome-remote-desktop
  gnome-remote-desktop:
    Instalados: 42.0-4ubuntu1
    Candidato:  42.0-4ubuntu1
    Tabla de versiĆ³n:
   *** 42.0-4ubuntu1 500
          500 http://ports.ubuntu.com/ubuntu-ports jammy/main arm64 Packages
          100 /var/lib/dpkg/status

  # uname -a
  Linux fpgrpi 5.15.0-1005-raspi #5-Ubuntu SMP PREEMPT Mon Apr 4 12:21:48 UTC 
2022 aarch64 aarch64 aarch64 GNU/Linux

  
  Summary of the bug:
  -------------------
  When I try to connect to gnome-remote-desktop using VNC to a Raspberry Pi 4 
Model B Rev 1.4 (8Gb) under Ubuntu 22.04 LTS the VNC client can't connect 
(connection is refused). The connection passes the Password check validation 
but don't connect (sometimes shows screen garbage before disconnecting).

  I've used several VNC clients (Remmina in Ubuntu and Real VNC in
  Android) getting the same problem failing either in X11 or Wayland.

  Notes: 
  - VNC connection does work in in previous Ubuntu 21.10 version with the same 
architecture (arm64) and same Raspberry Pi.
  - VNC connection also does work in amd64 machines with Ubuntu 22.04 LTS and 
gnome-remote-desktop 42.0-4ubuntu1, exactly the same software version that 
doesn't work on arm64 (Raspberry Pi).

  There is no apport info at all. Also there is almost no info in the
  journal regarding this problem. When I try to connect to VNC server it
  show this:

  On Wayland:
  -----------
  abr 25 00:21:42 fpgrpi kernel: vc4-drm gpu: swiotlb buffer is full (sz: 
1884160 bytes), total 32768 (slots), used 3 (slots)
  abr 25 00:21:42 fpgrpi kernel: vc4-drm gpu: swiotlb buffer is full (sz: 
4169728 bytes), total 32768 (slots), used 3 (slots)
  abr 25 00:21:42 fpgrpi kernel: vc4-drm gpu: swiotlb buffer is full (sz: 
8130560 bytes), total 32768 (slots), used 83 (slots)
  abr 25 00:21:42 fpgrpi kernel: vc4-drm gpu: swiotlb buffer is full (sz: 
8294400 bytes), total 32768 (slots), used 3 (slots)
  abr 25 00:21:42 fpgrpi kernel: vc4-drm gpu: swiotlb buffer is full (sz: 
8294400 bytes), total 32768 (slots), used 3 (slots)
  abr 25 00:21:42 fpgrpi kernel: vc4-drm gpu: swiotlb buffer is full (sz: 
8294400 bytes), total 32768 (slots), used 3 (slots)
  abr 25 00:21:42 fpgrpi kernel: vc4-drm gpu: swiotlb buffer is full (sz: 
8294400 bytes), total 32768 (slots), used 3 (slots)
  abr 25 00:21:43 fpgrpi systemd[1381]: gnome-remote-desktop.service: Main 
process exited, code=killed, status=11/SEGV
  abr 25 00:21:43 fpgrpi systemd[1381]: gnome-remote-desktop.service: Failed 
with result 'signal'.
  abr 25 00:21:43 fpgrpi gnome-shell[1497]: D-Bus client with active sessions 
vanished
  abr 25 00:21:43 fpgrpi systemd[1381]: gnome-remote-desktop.service: Scheduled 
restart job, restart counter is at 1.
  abr 25 00:21:43 fpgrpi systemd[1381]: Stopped GNOME Remote Desktop.
  abr 25 00:21:43 fpgrpi systemd[1381]: Starting GNOME Remote Desktop...
  abr 25 00:21:43 fpgrpi systemd[1381]: Started GNOME Remote Desktop.
  abr 25 00:21:43 fpgrpi gnome-remote-desktop-daemon[2125]: Cannot load 
libcuda.so.1
  abr 25 00:21:43 fpgrpi gnome-remote-desktop-daemon[2125]: Cannot load 
libnvidia-encode.so.1
  abr 25 00:21:43 fpgrpi gnome-remote-de[2125]: RDP server started
  abr 25 00:21:43 fpgrpi gnome-remote-de[2125]: VNC server started

  
  On X11:
  -------
  abr 25 00:12:18 fpgrpi systemd[2859]: gnome-remote-desktop.service: Main 
process exited, code=killed, status=11/SEGV
  abr 25 00:12:18 fpgrpi gnome-shell[3044]: D-Bus client with active sessions 
vanished
  abr 25 00:12:18 fpgrpi systemd[2859]: gnome-remote-desktop.service: Failed 
with result 'signal'.
  abr 25 00:12:18 fpgrpi systemd[2859]: gnome-remote-desktop.service: Scheduled 
restart job, restart counter is at 19.
  abr 25 00:12:18 fpgrpi systemd[2859]: Stopped GNOME Remote Desktop.
  abr 25 00:12:18 fpgrpi systemd[2859]: Starting GNOME Remote Desktop...
  abr 25 00:12:18 fpgrpi systemd[2859]: Started GNOME Remote Desktop.
  abr 25 00:12:19 fpgrpi gnome-remote-desktop-daemon[23876]: Cannot load 
libcuda.so.1
  abr 25 00:12:19 fpgrpi gnome-remote-desktop-daemon[23876]: Cannot load 
libnvidia-encode.so.1
  abr 25 00:12:19 fpgrpi gnome-remote-de[23876]: RDP server started
  abr 25 00:12:19 fpgrpi gnome-remote-de[23876]: VNC server started

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