- Add a new Sigil Preferences settings to disable GPU acceleration for QtWebEngine/Preview to make it easier for Sigil to keep working even with older graphics drivers
If, for whatever reason, Sigil won't launch correctly, you can manually set that new preference by editing the Sigil.ini file by hand.
1) with Sigil closed, use the
tips page from the Sigil website to find/open your Sigil preferences folder
2) open the sigil.ini file in your favorite text editor and add the line:
to the end of the [user_preferences] section.
3) save and close the file before launching Sigil.
You can also temporarily set the QTWEBENGINE_CHROMIUM_FLAGS environment variable to "--disable-gpu", launch Sigil, set the preference, and then unset QTWEBENGINE_CHROMIUM_FLAGS
This is not going to work any magic if your graphics card/drivers are really old, but if you're seeing white screens and some partially rendered graphics, this setting may make Sigil useable. No promises, though.