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Fix startup crash on Linux Wayland by falling back to XWayland (xcb) #39

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Fix startup crash on Linux Wayland by falling back to XWayland (xcb) #39

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14 changes: 14 additions & 0 deletions ndviewer_light/core.py
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Original file line number Diff line number Diff line change
Expand Up @@ -4019,8 +4019,22 @@ def closeEvent(self, event):

def main(dataset_path: str = None):
"""Launch lightweight viewer."""
import os
import platform
import sys

# On Linux Wayland sessions, PyQt5 + vispy (OpenGL) fails to create an EGL
# surface ("Could not create EGL surface", "QOpenGLWidget: Failed to make
# context current"), so the viewer crashes on startup. Fall back to
# XWayland (xcb), which renders reliably, unless the user has already
# chosen a Qt platform.
if (
platform.system() == "Linux"
and os.environ.get("WAYLAND_DISPLAY")
and "QT_QPA_PLATFORM" not in os.environ
):
os.environ["QT_QPA_PLATFORM"] = "xcb"

app = QApplication(sys.argv)

if dataset_path:
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