/usr/share/libwacom/isdv4-50b4.tablet is in libwacom-common 0.29-1.
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 | # this is for the Wacom pen + touchscreen as found in the Lenovo ThinkPad X1 Yoga (2nd-gen)
[Device]
Name=Wacom ISDv4 50b4
DeviceMatch=usb:056a:50b4
Class=ISDV4
Width=12
Height=7
IntegratedIn=Display;System
[Features]
Stylus=true
Touch=true
Buttons=0
|