postrm is in bumblebee-nvidia 3.2.1-17.
This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 | #!/bin/sh
set -e
case "$1" in
remove|abort-install)
# Restore the alternatives in case bumblebee is installed on a
# non-Optimus system that requires the nvidia driver
for arch in x86_64-linux-gnu i386-linux-gnu; do
update-alternatives --force --auto ${arch}_gl_conf 2>/dev/null || true
done
ldconfig
;;
esac
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