/lib/udev/rules.d/75-tty-description.rules is in udev 175-0ubuntu9.
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 10 11 12 13 14 | # do not edit this file, it will be overwritten on update
ACTION=="remove", GOTO="tty_end"
SUBSYSTEM!="tty", GOTO="tty_end"
SUBSYSTEMS=="usb", ENV{ID_MODEL}=="", IMPORT{builtin}="usb_id"
SUBSYSTEMS=="usb", ENV{ID_MODEL_FROM_DATABASE}=="", IMPORT{program}="usb-db %p"
SUBSYSTEMS=="usb", ATTRS{idVendor}!="", ATTRS{idProduct}!="", ENV{ID_VENDOR_ID}="$attr{idVendor}", ENV{ID_MODEL_ID}="$attr{idProduct}"
SUBSYSTEMS=="usb", GOTO="tty_end"
SUBSYSTEMS=="pci", ENV{ID_MODEL_FROM_DATABASE}=="", IMPORT{program}="pci-db %p"
SUBSYSTEMS=="pci", ENV{ID_BUS}="pci", ENV{ID_VENDOR_ID}="$attr{vendor}", ENV{ID_MODEL_ID}="$attr{device}"
LABEL="tty_end"
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