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fix: conditionally force Mesa GLX to avoid breaking NVIDIA GPU passthrough #14

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fix: conditionally force Mesa GLX to avoid breaking NVIDIA GPU passthrough #14

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15 changes: 15 additions & 0 deletions entrypoint.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -8,5 +8,20 @@ if ! nvidia-smi > /dev/null 2>&1; then
echo "WARNING: The NVIDIA Driver was not detected. GPU functionality will not be available."
fi

# Conditionally force Mesa for software rendering.
# Commit dd662d8 added __GLX_VENDOR_LIBRARY_NAME=mesa to fix window creation on
# setups without NVIDIA GLX passthrough (e.g. CPU-only or WSL2 without graphics
# bindings). However, forcing Mesa breaks native NVIDIA GLX passthrough because
# Mesa tries to load the nvidia-drm DRI driver, which is not present in the
# container, leading to Zink/Vulkan swapchain errors.
# Only set it when NVIDIA GLX libraries are absent and the user hasn't
# explicitly configured it.
if [ -z "${__GLX_VENDOR_LIBRARY_NAME+x}" ]; then
if ! ldconfig -p 2>/dev/null | grep -q "libGLX_nvidia.so.0"; then
export __GLX_VENDOR_LIBRARY_NAME=mesa
echo "INFO: NVIDIA GLX libraries not found. Forcing Mesa for software rendering."
fi
fi

# keep container running
exec "$@"
3 changes: 1 addition & 2 deletions puffertank.dockerfile
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Expand Up @@ -66,8 +66,7 @@ RUN echo "export PS1=$''" >> ~/.bashrc \
&& echo "alias diff='diff --color --palette=':ad=36:de=31:ln=33''" >> ~/.bashrc \
&& echo "alias pip='uv pip'" >> ~/.bashrc \
&& echo ". /puffertank/venv/bin/activate" >> ~/.bashrc \
&& echo "cd /puffertank/pufferlib" >> ~/.bashrc \
&& echo "export __GLX_VENDOR_LIBRARY_NAME=mesa" >> ~/.bashrc
&& echo "cd /puffertank/pufferlib" >> ~/.bashrc

RUN apt-get clean
CMD ["/bin/bash"]