/lib/udev/rules.d/40-xdiagnose.rules is in xdiagnose 3.6.3build2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 | # do not edit this file, it will be overwritten on update
# Jesse Barnes on ubuntu-devel@lists.ubuntu.com:
# You'll get three events, one when the error is detected, one before the
# reset and one after. Each has a different environment variable set; the
# initial error has ERROR=1, the pre-reset event has RESET=1 and the
# post-reset event has ERROR=0.
#SUBSYSTEM=="drm", ACTION=="change", ENV{RESET}=="1", RUN+="/usr/share/apport/apport-gpu-error-intel.py"
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