Arch Linux User Repository

Thanks @tobac. Looks like reinstalling previous aur python packages (haphazardly installed them all) did the trick. There was also an issue about a missing "dataclasses" module. Reinstalling python-dataclasses fixed said issue.

@keiichiiownsu12: Yes, previous Python packages from the AUR need to be reinstalled, including fslpy, which (probably) causes your error.

Hello,

After a recent python update, the console has been displaying the following error when starting fsleyes (using X11):

Traceback (most recent call last):
  File "/usr/bin/fsleyes", line 33, in <module>
    sys.exit(load_entry_point('fsleyes==0.34.2', 'gui_scripts', 'fsleyes')())
  File "/usr/bin/fsleyes", line 25, in importlib_load_entry_point
    return next(matches).load()
  File "/usr/lib/python3.9/importlib/metadata.py", line 77, in load
    module = import_module(match.group('module'))
  File "/usr/lib/python3.9/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1030, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1007, in _find_and_load
  File "<frozen importlib._bootstrap>", line 972, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 228, in _call_with_frames_removed
  File "<frozen importlib._bootstrap>", line 1030, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1007, in _find_and_load
  File "<frozen importlib._bootstrap>", line 986, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 680, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 790, in exec_module
  File "<frozen importlib._bootstrap>", line 228, in _call_with_frames_removed
  File "/usr/lib/python3.9/site-packages/fsleyes/__init__.py", line 206, in <module>
    from   fsl.utils.platform import platform as fslplatform
ModuleNotFoundError: No module named 'fsl'

Thought the "fsl" module was found in nipype. Installed nipype via pip, but that did not solve anything. Should I maybe reinstall previous python packages?

Would it be possible to make a patch that creates a small shell script to launch fsleyes after setting the following environmental variable:

GDK_BACKEND=x11

This would then allow fsleyes to run under XWayland on Wayland desktop sessions.

Alternatively, some sort of alias might work:

alias fsleyes='GDK_BACKEND=x11 fsleyes'

EDIT: On second thoughts I'm not sure this is such a good idea. However, I'll leave my initial suggestions up here in case anyone is struggling to run this on Wayland.

Thanks for pointing these two issues out. Fixed in 0.34.2-2.

I also received the following error when trying to reinstall fsleyes:

==> ERROR: Failure while downloading https://git.fmrib.ox.ac.uk/uploads/-/system/group/avatar/85/icon_512x512.png
    Aborting...

Hi @tobac,

Just tried to run fsleyes for the first time since the update. It wouldn't launch, and threw this error when launched from the terminal:

Traceback (most recent call last):
  File "/usr/bin/fsleyes", line 33, in <module>
    sys.exit(load_entry_point('fsleyes==0.34.2', 'gui_scripts', 'fsleyes')())
  File "/usr/lib/python3.8/site-packages/fsleyes/filtermain.py", line 204, in main
    result = fm.main(args)
  File "/usr/lib/python3.8/site-packages/fsleyes/main.py", line 214, in main
    fsleyes.initialise()
  File "/usr/lib/python3.8/site-packages/fsleyes/__init__.py", line 253, in initialise
    import fsleyes.plugins as plugins
  File "/usr/lib/python3.8/site-packages/fsleyes/plugins.py", line 173, in <module>
    import            pkg_resources
  File "/usr/lib/python3.8/site-packages/pkg_resources/__init__.py", line 3239, in <module>
    def _initialize_master_working_set():
  File "/usr/lib/python3.8/site-packages/pkg_resources/__init__.py", line 3222, in _call_aside
    f(*args, **kwargs)
  File "/usr/lib/python3.8/site-packages/pkg_resources/__init__.py", line 3251, in _initialize_master_working_set
    working_set = WorkingSet._build_master()
  File "/usr/lib/python3.8/site-packages/pkg_resources/__init__.py", line 567, in _build_master
    ws.require(__requires__)
  File "/usr/lib/python3.8/site-packages/pkg_resources/__init__.py", line 884, in require
    needed = self.resolve(parse_requirements(requirements))
  File "/usr/lib/python3.8/site-packages/pkg_resources/__init__.py", line 770, in resolve
    raise DistributionNotFound(req, requirers)
pkg_resources.DistributionNotFound: The 'certifi>=2020.06.20' distribution was not found and is required by matplotlib

I installed python-certifi via pacman, then all was well. You should probably add the package to the depends array of the PKGBUILD.

Seems like you're running Wayland. Have you tried reverting back to Xorg?

My bad. You're right. All was fine. I was just using Wayland instead of Xorg.

Seems like you're running Wayland. Have you tried reverting back to Xorg?

On startup or in a specific usage situation?

It's on startup.

Have you tried reinstalling fslpy/fsleyes?

I've just tried reinstalling both fslpy and fsleyes. Get the following output when running fsleyes from the terminal:

Gdk-Message: 09:21:26.819: Window 0x562a3a8dc2b0 is a temporary window without parent, application will not be able to position it on screen.
Gdk-Message: 09:21:26.819: Window 0x562a3a8dc2b0 is a temporary window without parent, application will not be able to position it on screen.
Gdk-Message: 09:21:26.819: Window 0x562a3a8dc2b0 is a temporary window without parent, application will not be able to position it on screen.
Gdk-Message: 09:21:26.819: Window 0x562a3a8dc2b0 is a temporary window without parent, application will not be able to position it on screen.
Gdk-Message: 09:21:26.819: Window 0x562a3a8dc2b0 is a temporary window without parent, application will not be able to position it on screen.
Gdk-Message: 09:21:26.819: Window 0x562a3a8dc2b0 is a temporary window without parent, application will not be able to position it on screen.
Gdk-Message: 09:21:26.819: Window 0x562a3a8dc2b0 is a temporary window without parent, application will not be able to position it on screen.
Gdk-Message: 09:21:26.819: Window 0x562a3a8dc2b0 is a temporary window without parent, application will not be able to position it on screen.

Segmentation fault (core dumped)