Edvard Jaegtnes
9efeb4b1d4
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.
Files in this directory specify a description of hardware devices, in the form of mappings from modalias-like keys (which identify specific hardware devices) to udev properties. Files in this directory are not read by udev directly. Instead, man:systemd-hwdb(8) compiles them into a binary database. See man:hwdb(7) for an overview of the configuration file format, and man:systemd-udevd.service(8) for a description of the udev daemon. Use 'systemd-analyze cat-config udev/hwdb.d' to display the effective config.