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#!/bin/ash
# ^ sourced
# This is required for Mesa 20.0+ for now. Starting from this version,
# the new "Iris" OpenGL driver has been made default for intel Gen8
# and newer, which unfortunately completely breaks 3D acceleration with
# VMware 15.5.6 (as of 2020-08-04 with Mesa 20.0 + Ubuntu 20.04 as base)
drivers="$( grep -Po '(?<=LoadModule: "|Matched )[^"]*' /var/log/Xorg.0.log )"
intel=false
other=false
for driver in $drivers; do
case "$driver" in
ati|amdgpu|nvidia|nouveau|vmware)
other=true
;;
intel)
intel=true
;;
esac
done
if $intel && ! $other; then
export MESA_LOADER_DRIVER_OVERRIDE=i965
fi
true
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