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udev: hide raw ithc input nodes duplicated by iptsd #221

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udev: hide raw ithc input nodes duplicated by iptsd #221

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8 changes: 8 additions & 0 deletions etc/udev/50-iptsd.rules.in
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Original file line number Diff line number Diff line change
Expand Up @@ -2,3 +2,11 @@ SUBSYSTEM=="hidraw", ACTION=="add", TAG+="systemd", \
PROGRAM="@bindir@/iptsd-check-device --quiet $env{DEVNAME}", \
PROGRAM="/bin/systemd-escape --path $env{DEVNAME}", \
ENV{SYSTEMD_WANTS}+="iptsd@$result.service"

# Hide the raw Intel Touch Host Controller (ithc) input nodes from libinput.
# On Tiger Lake devices (e.g. Surface Pro 7+/8) these duplicate the calibrated
# nodes iptsd publishes above ("IPTSD Virtual Touchscreen"/"IPTSD Virtual
# Stylus") and report a 16:9 geometry on panels that are actually 3:2, causing
# duplicate touch events and distorted coordinates near the edges.
SUBSYSTEM=="input", ATTRS{name}=="Intel Touch Host Controller*", \
ENV{ID_INPUT}="", ENV{ID_INPUT_TOUCHSCREEN}="", ENV{ID_INPUT_TABLET}=""