https://bugs.freedesktop.org/show_bug.cgi?id=89802
Bug ID: 89802
Summary: libinput incorrectly groups device behind same USB hub
Product: Wayland
Version: unspecified
Hardware: Other
OS: All
Status: NEW
Severity: minor
Priority: medium
Component: libinput
Assignee: [email protected]
Reporter: [email protected]
The logic that libinput uses to determine if two devices should be part of the
same group winds up grouping together anything behind the same USB hub. The
Cintiq 24HDT uses such a hub internally to provide seperate tablet and
touchscreen devices. It also, however, exposes one of the hub's ports
externally for the user to connect things to. If another input device is
connected to that port, it will be added to the same group as the Cintiq. This
can also be observed with /any/ USB hub, grouping all devices plugged into it.
This doesn't seem to cause any issues at the moment, but has been filed so it
isn't forgotten. I imagine that fixing it will likely first require having
libwacom or udev provide more information about related devices.
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