xpra on Clear Linux

[Aqua1ung]

Hi, I have been trying to use xpra as a remote desktop solution in my Clear Linux(CL) Wayland environment, so far without much success. May I please get some help? As far I can tell, there may be some dependencies missing.

I have two CL computers connected to the same router. I run xpra start-desktop --start=xterm on the host:

dad@DadsGram~ $ xpra start-desktop --start=xterm
using systemd-run to wrap 'desktop' server command
Running scope as unit: run-rff7f3a35f8a34d47949266a30cf755cb.scope
2023-03-19 15:57:49,447 Error: failed to read from '/etc/profile'
2023-03-19 15:57:49,447  [Errno 2] No such file or directory: '/etc/profile'
2023-03-19 15:57:49,449 Error 1 running source script '/etc/profile'
2023-03-19 15:57:49,449 Error sourcing '/etc/profile': Expecting value: line 1 column 1 (char 0)
Entering daemon mode; any further errors will be reported to:
  '/run/user/1000/xpra/S37826/server.log'

and xpra attach ssh://[email protected]/100 on the client:

dad@spectre~ $ xpra attach ssh://[email protected]/100
2023-03-19 16:00:00,785 Xpra GTK3 Wayland client version 4.4.4-r83 64-bit
2023-03-19 16:00:00,792  running on Linux
2023-03-19 16:00:00,792  window manager is 'GNOME on wayland'
2023-03-19 16:00:01,315 GStreamer version 1.22.1
2023-03-19 16:00:01,349 Warning: cannot enable SSH socket upgrades
2023-03-19 16:00:01,349  No module named 'paramiko'
2023-03-19 16:00:01,351 created unix domain socket '/run/user/1000/xpra/clients/spectre-7664'
/usr/lib/python3.11/site-packages/PIL/Image.py:3281: UserWarning: image file could not be identified because WEBP support not installed
  warnings.warn(message)
2023-03-19 16:00:01,388 Pillow error decoding webp with data:
2023-03-19 16:00:01,388  b'RIFF\\\x00\x00\x00WEBPVP8X\n\x00\x00\x00\x10\x00\x00\x00\x1f\x00\x00\x1f\x00\x00ALPH\x0f\x00\x00\x00\x01\x07\x10\x11\x11\x00\x12\xc2\xff\xefzD\xffS\x0f\x00VP8 &\x00\x00\x00\xd0\x02\x00\x9d\x01* \x00 \x00>\xd1b\xaaO\xa8%\xa3\xa2(\x08\x01\x00\x1a\ti\x00\x00=\xa3\xa0\x00\xfe\xf3\x9d\x80\x00\x00'
2023-03-19 16:00:01,388  cannot identify image file <_io.BytesIO object at 0x563f34ca2610>
Traceback (most recent call last):
  File "/usr/lib/python3.11/site-packages/xpra/codecs/pillow/decoder.py", line 190, in selftest
    img = PIL.Image.open(buf)
          ^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/site-packages/PIL/Image.py", line 3283, in open
    raise UnidentifiedImageError(msg)
PIL.UnidentifiedImageError: cannot identify image file <_io.BytesIO object at 0x563f34ca2610>
2023-03-19 16:00:01,389 Pillow error decoding webp with data:
2023-03-19 16:00:01,389  b'RIFF\\\x00\x00\x00WEBPVP8X\n\x00\x00\x00\x10\x00\x00\x00\x1f\x00\x00\x1f\x00\x00ALPH\x0f\x00\x00\x00\x01\x07\x10\x11\x11\x00\x12\xc2\xff\xefzD\xffS\x0f\x00VP8 &\x00\x00\x00\xd0\x02\x00\x9d\x01* \x00 \x00>\xd1b\xaaO\xa8%\xa3\xa2(\x08\x01\x00\x1a\ti\x00\x00=\xa3\xa0\x00\xfe\xf3\x9d\x80\x00\x00'
2023-03-19 16:00:01,389  cannot identify image file <_io.BytesIO object at 0x563f34cf3e20>
Traceback (most recent call last):
  File "/usr/lib/python3.11/site-packages/xpra/codecs/pillow/decoder.py", line 190, in selftest
    img = PIL.Image.open(buf)
          ^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/site-packages/PIL/Image.py", line 3283, in open
    raise UnidentifiedImageError(msg)
PIL.UnidentifiedImageError: cannot identify image file <_io.BytesIO object at 0x563f34cf3e20>
2023-03-19 16:00:01,476 keyboard bindings are not available
2023-03-19 16:00:01,476  expect keyboard mapping problems
2023-03-19 16:00:01,476  (incomplete wayland support)
2023-03-19 16:00:01,542  keyboard settings: layout=unset
2023-03-19 16:00:01,542  desktop size is 1920x1080:
2023-03-19 16:00:01,543   wayland-0 (290x170 mm - DPI: 168x161)
2023-03-19 16:00:01,543     AUO 0x422d

(xpra:7664): Gtk-CRITICAL **: 16:00:01.663: gtk_widget_get_scale_factor: assertion 'GTK_IS_WIDGET (widget)' failed

(xpra:7664): Gtk-CRITICAL **: 16:00:01.663: gtk_widget_get_scale_factor: assertion 'GTK_IS_WIDGET (widget)' failed
The authenticity of host '192.168.153.86 (192.168.153.86)' can't be established.
ED25519 key fingerprint is SHA256:1Bkc8wJN2PEZ9EI9Vfird1Iyn5OW91Utnmizq3BdM1k.
This key is not known by any other names.
Are you sure you want to continue connecting (yes/no/[fingerprint])? y
Please type 'yes', 'no' or the fingerprint: yes
Warning: Permanently added '192.168.153.86' (ED25519) to the list of known hosts.
([email protected]) Password: 
server socket for display :100 not found
 waiting up to 20 seconds
xpra initialization error:
 cannot find live server for display :100
2023-03-19 16:00:41,532 Error: failed to receive anything, not an xpra server?
2023-03-19 16:00:41,533   could also be the wrong protocol, username, password or port
2023-03-19 16:00:41,533   or the session was not found
2023-03-19 16:00:41,533   or maybe this server does not support 'unknown' compression or 'bencode' packet encoding?
2023-03-19 16:00:41,533 Connection failed
2023-03-19 16:00:41,543 removing unix domain socket '/run/user/1000/xpra/clients/spectre-7664'

(xpra:7664): Gtk-CRITICAL **: 16:00:41.544: gtk_widget_get_scale_factor: assertion 'GTK_IS_WIDGET (widget)' failed

[totaam]

Error sourcing '/etc/profile'

Remove this source from /etc/xpra/conf.d/60_server.conf

Entering daemon mode; any further errors will be reported to

Run with --no-daemon to see the server output.

PIL/Image.py:3281: UserWarning: image file could not be identified because WEBP support not installed

Looks like an ancient version of python-pillow.

xpra attach ssh://[email protected]/100
(..)
cannot find live server for display :100

You've specified display 100 here with attach, but not with xpra start-desktop so it probably used a different number.
Just remove 100 from your attach command line and xpra should figure out which display number to use (assuming you only have one session running).

[Aqua1ung]

Thank you for the prompt reply. It looks like there is no /etc/xpra/ directory to begin with, which makes me think that the current xpra installation package in CL is incomplete:

dad@DadsGram/etc $ xpra --version
xpra v4.4.4-r83

[Aqua1ung]

Here's also a wild thought: I don't suppose there's a small chance that xpra could be packaged as a Flatpak or appimage, is there?

[totaam]

@Aqua1ung Flatpak or appimage won't support all the integration we need:
#1748 (comment)

[Aqua1ung]

Atempting to use xpra GUI to start a desktop session on the local system. Is there any documentation on how to use the GUI? For example, in the "Start Xpra Session" window, what does one type in into the "Display" box and into the "Desktop Environment" box?

Here are the details of the xpra installation.

[totaam]

Is there any documentation on how to use the GUI?

None should be needed.

what does one type in into the "Display" box

The display is optional as can be seen in your screenshot.

and into the "Desktop Environment" box?

This should be populated with a drop down menu giving you a list of all the desktop environments installed on your system.
My guess is that you have a problem very similar to this one I just answered:
https://github.com/orgs/Xpra-org/discussions/3805#discussioncomment-5430481
You need the python-xdg library to be able to parse the menu data on your system.

Here are the details of the xpra installation.

That is insufficient. Xpra depends on hundreds of tools and libraries, which are not shown here.