udev: hide raw ithc input nodes duplicated by iptsd - #221
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On Tiger Lake devices (Surface Pro 7+/8), the ithc kernel driver exposes raw "Intel Touch Host Controller" input nodes alongside the calibrated virtual devices iptsd creates. The raw nodes report a 16:9 geometry that does not match the 3:2 panel, and libinput picking both up causes duplicate touch events and distorted coordinates near the edges. This rule strips ID_INPUT/ID_INPUT_TOUCHSCREEN/ID_INPUT_TABLET from the raw nodes so libinput only sees the calibrated IPTSD Virtual Touchscreen/Stylus devices. Verified on a Surface Pro 7+ running Fedora. Fixes linux-surface#220
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On Tiger Lake devices (Surface Pro 7+/8), the ithc kernel driver exposes
raw "Intel Touch Host Controller" input nodes alongside the calibrated
virtual devices iptsd creates. The raw nodes report a 16:9 geometry that
does not match the 3:2 panel, and libinput picking both up causes
duplicate touch events and distorted coordinates near the edges.
This rule strips ID_INPUT/ID_INPUT_TOUCHSCREEN/ID_INPUT_TABLET from the
raw nodes so libinput only sees the calibrated IPTSD Virtual
Touchscreen/Stylus devices.
Verified on a Surface Pro 7+ running Fedora 44, kernel 6.19.8-surface:
before this rule,
udevadm infoshows both the raw and virtualtouchscreen nodes tagged ID_INPUT_TOUCHSCREEN=1; after it, only the
IPTSD Virtual Touchscreen node is.
Fixes #220