Recently switched to Linux on my Dell Precision 7510 and noticed a
jittery/shaking effect when scrolling slowly with the touchpad, across
multiple applications.
libinput measure fuzz reported no fuzz value set for the touchpad's
axes, which explains the jitter (sensor noise being read as real
motion). Used libinput measure fuzz --fuzz=28 to generate and apply a
hwdb override, then confirmed scrolling was smooth afterward.
Added a new entry to hwdb/60-evdev.hwdb for this device:
evdev:name:AlpsPS/2 ALPS DualPoint
TouchPad:dmi:*:svnDellInc.*:pnPrecision7510*:
This is the same touchpad family as #34133 (Dell Latitude E7440), which
hit the same symptom and fix — this PR extends the coverage to the
Precision 7510.
