"no enumerators available" on Linux MInt 20.1

[Moini]

Hi,

I've been trying to get this obs plugin to work:
https://github.com/tryptech/obs-zoom-and-follow

I've installed screeninfo today from pypi, using pip3, with the --user option.

But after including the script into obs, and then starting up obs, it gives me the following message on Linux Mint 20.1 Xfce:

[zoom_and_follow_mouse.py] Traceback (most recent call last):
[zoom_and_follow_mouse.py]   File "/home/username/.config/obs-studio/scripts/obs-zoom-and-follow-master/zoom_and_follow_mouse.py", line 19, in <module>
[zoom_and_follow_mouse.py]     class CursorWindow:
[zoom_and_follow_mouse.py]   File "/home/username/.config/obs-studio/scripts/obs-zoom-and-follow-master/zoom_and_follow_mouse.py", line 26, in CursorWindow
[zoom_and_follow_mouse.py]     d_w = get_monitors()[monitor_idx].width
[zoom_and_follow_mouse.py]   File "/home/username/.local/lib/python3.8/site-packages/screeninfo/screeninfo.py", line 37, in get_monitors
[zoom_and_follow_mouse.py]     raise ScreenInfoError("No enumerators available")
[zoom_and_follow_mouse.py] screeninfo.common.ScreenInfoError: No enumerators available

I'm having two monitors attached, configured from the Xfce settings. Please let me know which information you would need to help fix the problem.

[Robware]

I, too, am having this problem. Same OBS plugin, Linux Mint 20.1 Cinnamon, Python 3.8.5.

[rr-]

Can you please post the output of the following commands?

python3 -m screeninfo xrandr

and

python3 -m screeninfo xinerama

I'm using Mint with MATE and it's working fine for me

[Moini]

Sure, thanks for your help!

The outputs are:

(xrandr)

Monitor(x=0, y=0, width=1920, height=1200, width_mm=518, height_mm=324, name='DP-1')
Monitor(x=1920, y=161, width=1680, height=1050, width_mm=474, height_mm=296, name='HDMI-2')

(xinerama)

Monitor(x=0, y=0, width=1920, height=1200, width_mm=None, height_mm=None, name=None)
Monitor(x=1920, y=161, width=1680, height=1050, width_mm=None, height_mm=None, name=None)

[rr-]

That's very weird. I expected one of them to fail. What about two more commands?

python3 -m screeninfo

and

python3 -c 'from screeninfo import get_monitors; print(list(get_monitors()))'

[Robware]

Here are my outputs:

$ python3 -m screeninfo xrandr
Monitor(x=3440, y=769, width=1536, height=864, width_mm=309, height_mm=174, name='eDP-1')
Monitor(x=0, y=0, width=3440, height=1440, width_mm=800, height_mm=335, name='HDMI-1')
$ python3 -m screeninfo xinerama
Monitor(x=0, y=0, width=3440, height=1440, width_mm=None, height_mm=None, name=None)
Monitor(x=3440, y=769, width=1536, height=864, width_mm=None, height_mm=None, name=None)
$ python3 -m screeninfo
Monitor(x=3440, y=769, width=1536, height=864, width_mm=309, height_mm=174, name='eDP-1')
Monitor(x=0, y=0, width=3440, height=1440, width_mm=800, height_mm=335, name='HDMI-1')
$ python3 -c 'from screeninfo import get_monitors; print(list(get_monitors()))'
[Monitor(x=3440, y=769, width=1536, height=864, width_mm=309, height_mm=174, name='eDP-1'), Monitor(x=0, y=0, width=3440, height=1440, width_mm=800, height_mm=335, name='HDMI-1')]

I also imported that bit of python script in to OBS and it didn't throw an error, which makes me wonder if it's an error in the obs-zoom-and-follow repo. However it is the screeninfo code which is raising the exception due to, apparently, not finding anything.

[Moini]

Similar results here:

$ python3 -m screeninfo
Monitor(x=0, y=0, width=1920, height=1200, width_mm=518, height_mm=324, name='DP-1')
Monitor(x=1920, y=161, width=1680, height=1050, width_mm=474, height_mm=296, name='HDMI-2')

$ python3 -c 'from screeninfo import get_monitors; print(list(get_monitors()))'
[Monitor(x=0, y=0, width=1920, height=1200, width_mm=518, height_mm=324, name='DP-1'), Monitor(x=1920, y=161, width=1680, height=1050, width_mm=474, height_mm=296, name='HDMI-2')]

[rr-]

I would raise an issue there and link to this one here, as it indeed looks like a problem with how this script is executed by the OBS plugin, and solving it requires us to work together. Can I please ask you to create a bug report there?

[Moini]

Done: tryptech/obs-zoom-and-follow#7

(currently looks like there's not a lot of activity in that repo, so not sure whether anything will come from it :-/ )

[tryptech]

Does this error in OBS show up when you first add the script to OBS, or only in the case of starting a new instance of OBS after you have added the script in?

[Moini]

@tryptech Sorry, I don't remember if I got the same error already when I added the script ... But yes, it shows up every time I launch OBS now.

[tryptech]

Could you possibly remove the script and re-add it? I have this dumb gut feeling that it might be trying to get the monitors too fast.

[Moini]

Sure.

1. Reloading script: Same error.
2. Removing, then re-adding script: Same error.

Would it make a difference that the script is located in my /home/username/.config/obs/scripts directory?

[adawolfs]

I've tested it locally by printing the errors catched here

And it seems like obs is unable to properly import ctypes

[testing.py] Traceback (most recent call last):
[testing.py]   File "/home/adawolfs/obs/scripts/testing.py", line 5, in <module>
[testing.py]     from screeninfo import get_monitors
[testing.py]   File "/home/adawolfs/obs/scripts/screeninfo/screeninfo/__init__.py", line 2, in <module>
[testing.py]     from .screeninfo import get_monitors
[testing.py]   File "/home/adawolfs/obs/scripts/screeninfo/screeninfo/screeninfo.py", line 5, in <module>
[testing.py]     from screeninfo import enumerators
[testing.py]   File "/home/adawolfs/obs/scripts/screeninfo/screeninfo/enumerators/__init__.py", line 5, in <module>
[testing.py]     import screeninfo.enumerators.xrandr
[testing.py]   File "/home/adawolfs/obs/scripts/screeninfo/screeninfo/enumerators/xrandr.py", line 4, in <module>
[testing.py]     import ctypes
[testing.py]   File "/usr/lib/python3.8/ctypes/__init__.py", line 7, in <module>
[testing.py]     from _ctypes import Union, Structure, Array
[testing.py] ImportError: /usr/lib/python3.8/lib-dynload/_ctypes.cpython-38-x86_64-linux-gnu.so: undefined symbol: PyFloat_Type

[rr-]

This sounds like an installation / packaging problem of your distro, not this library

JonathanSalwan/Triton#276

[alliadt]

Can you please post the output of the following commands?

python3 -m screeninfo xrandr

and

python3 -m screeninfo xinerama

I'm using Mint with MATE and it's working fine for me

--
I have the same problem. Here is the result, under Windows 7 Python 3.7.6 :
code>python -m screeninfo xinerama
Traceback (most recent call last):
File "D:\ProgramFiles\Anaconda3\lib\runpy.py", line 193, in run_module_as_main
"main", mod_spec)
File "D:\ProgramFiles\Anaconda3\lib\runpy.py", line 85, in run_code
exec(code, run_globals)
File "E:\lib\site-packages\screeninfo_main.py", line 23, in
main()
File "E:\lib\site-packages\screeninfo_main.py", line 18, in main
for monitor in get_monitors(args.enumerator):
File "E:\lib\site-packages\screeninfo\screeninfo.py", line 29, in get_monitors
return _get_monitors(enumerator)
File "E:\lib\site-packages\screeninfo\screeninfo.py", line 19, in _get_monitors
return list(ENUMERATOR_MAP[enumerator].enumerate_monitors())
File "E:\lib\site-packages\screeninfo\enumerators\xinerama.py", line 20, in enumerate_monitors
xlib = load_library("X11")
File "E:\lib\site-packages\screeninfo\util.py", line 10, in load_library
raise ScreenInfoError("Could not load " + name)
screeninfo.common.ScreenInfoError: Could not load X11

code>python -m screeninfo xrandr
Traceback (most recent call last):
File "D:\ProgramFiles\Anaconda3\lib\runpy.py", line 193, in run_module_as_main
"main", mod_spec)
File "D:\ProgramFiles\Anaconda3\lib\runpy.py", line 85, in run_code
exec(code, run_globals)
File "E:\ib\site-packages\screeninfo_main.py", line 23, in
main()
File "E:\lib\site-packages\screeninfo_main.py", line 18, in main
for monitor in get_monitors(args.enumerator):
File "E:\lib\site-packages\screeninfo\screeninfo.py", line 29, in get_monitors
return _get_monitors(enumerator)
File "E:\lib\site-packages\screeninfo\screeninfo.py", line 19, in _get_monitors
return list(ENUMERATOR_MAP[enumerator].enumerate_monitors())
File "E:\lib\site-packages\screeninfo\enumerators\xrandr.py", line 62, in enumerate_monitors
xlib = load_library("X11")
File "E:\lib\site-packages\screeninfo\util.py", line 10, in load_library
raise ScreenInfoError("Could not load " + name)
screeninfo.common.ScreenInfoError: Could not load X11