This sounds like the same problem we just closed an issue for
(https://github.com/leo-editor/leo-editor/issues/4327). It's a problem
with the 6.9.0 QtWebEngine not playing well with the graphics card. Try
exporting this setting:
QTWEBENGINE_CHROMIUM_FLAGS=--disable-gpu
If that doesn't fix the problem, then you will have to use an earlier
version of the WebEngine until Trolltech releases a newer version without
the bug.
On Wednesday, April 23, 2025 at 12:15:28 PM UTC-4 viktor....@gmail.com
wrote:
> Hello Edward & Thomas,
>
> I recently switched a set of VMs from Fedora Linux 40 to 41.
>
> This also resulted in a complete new installation of Leo 6.8.3 from PyPI.
>
> After the new installation some of them reported tracebacks - See
> "Log-001".
>
> On all of them I had the plugins 'viewrendered3' & 'freewin' enabled.
>
> I was able to resolve the issue by switching to the 'viewrendered' plugin
> & to disable the 'freewin' plugin. - See "Log-002".
>
> I assume it has to do with either the newer Python - and / or - the newer
> Qt version ...
>
> Shall I create a bug-report for this issue ?
>
> With kind regards,
>
> Viktor
>
> ### Log-001
>
> Leo Log Window
> Leo 6.8.3, master branch
> Python 3.13.2, PyQt version 6.9.0
> linux
> setting leoID from os.getenv('USER'): 'user'
> home: /home/user
> leo-editor: /home/user/PyVE/PyPI/Leo/lib64/python3.13/site-packages
> load:
> /home/user/PyVE/PyPI/Leo/lib64/python3.13/site-packages/leo/core
> config:
> /home/user/PyVE/PyPI/Leo/lib64/python3.13/site-packages/leo/config
> reading settings in
> /home/user/PyVE/PyPI/Leo/lib64/python3.13/site-packages/leo/config/leoSettings.leo
> reading settings in /home/user/.leo/myLeoSettings.leo
> reading settings in
> /home/user/PyVE/PyPI/Leo/lib64/python3.13/site-packages/leo/themes/tbp_dark_solarized.leo
> Traceback (most recent call last):
> File
> "/home/user/PyVE/PyPI/Leo/lib64/python3.13/site-packages/leo/core/leoPlugins.py",
>
> line 545, in loadOnePluginHelper
> __import__(moduleName)
> ~~~~~~~~~~^^^^^^^^^^^^
> File
> "/home/user/PyVE/PyPI/Leo/lib64/python3.13/site-packages/leo/plugins/viewrendered3.py",
>
> line 1043, in <module>
> qwv = QtWebEngineWidgets.QWebEngineView
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> AttributeError: 'NoneType' object has no attribute 'QWebEngineView'
> Traceback (most recent call last):
> File
> "/home/user/PyVE/PyPI/Leo/lib64/python3.13/site-packages/leo/core/leoPlugins.py",
>
> line 545, in loadOnePluginHelper
> __import__(moduleName)
> ~~~~~~~~~~^^^^^^^^^^^^
> File
> "/home/user/PyVE/PyPI/Leo/lib64/python3.13/site-packages/leo/plugins/freewin.py",
>
> line 294, in <module>
> QWebEngineView = QtWebEngineWidgets.QWebEngineView
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> AttributeError: 'NoneType' object has no attribute 'QWebEngineView'
> reading settings in /home/user/Documents/SL2025.leo
> Traceback (most recent call last):
> File
> "/home/user/PyVE/PyPI/Leo/lib64/python3.13/site-packages/leo/core/leoPlugins.py",
>
> line 545, in loadOnePluginHelper
> __import__(moduleName)
> ~~~~~~~~~~^^^^^^^^^^^^
> File
> "/home/user/PyVE/PyPI/Leo/lib64/python3.13/site-packages/leo/plugins/viewrendered3.py",
>
> line 1043, in <module>
> qwv = QtWebEngineWidgets.QWebEngineView
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> AttributeError: 'NoneType' object has no attribute 'QWebEngineView'
> Traceback (most recent call last):
> File
> "/home/user/PyVE/PyPI/Leo/lib64/python3.13/site-packages/leo/core/leoPlugins.py",
>
> line 545, in loadOnePluginHelper
> __import__(moduleName)
> ~~~~~~~~~~^^^^^^^^^^^^
> File
> "/home/user/PyVE/PyPI/Leo/lib64/python3.13/site-packages/leo/plugins/freewin.py",
>
> line 294, in <module>
> QWebEngineView = QtWebEngineWidgets.QWebEngineView
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> AttributeError: 'NoneType' object has no attribute 'QWebEngineView'
> read outline in 0.02 seconds
>
> ### Log-002
>
> Leo Log Window
> Leo 6.8.3, master branch
> Python 3.13.2, PyQt version 6.9.0
> linux
> setting leoID from os.getenv('USER'): 'user'
> home: /home/user
> leo-editor: /home/user/PyVE/PyPI/Leo/lib64/python3.13/site-packages
> load:
> /home/user/PyVE/PyPI/Leo/lib64/python3.13/site-packages/leo/core
> config:
> /home/user/PyVE/PyPI/Leo/lib64/python3.13/site-packages/leo/config
> reading settings in
> /home/user/PyVE/PyPI/Leo/lib64/python3.13/site-packages/leo/config/leoSettings.leo
> reading settings in /home/user/.leo/myLeoSettings.leo
> reading settings in
> /home/user/PyVE/PyPI/Leo/lib64/python3.13/site-packages/leo/themes/tbp_dark_solarized.leo
> reading settings in /home/user/Documents/SL2025.leo
> read outline in 0.02 seconds
>
>
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