peter.hutterer at who-t.net
Mon Jun 8 22:38:48 PDT 2015
On Tue, Jun 09, 2015 at 07:23:36AM +0200, Peter Korsgaard wrote:
> >>>>> "Peter" == Peter Hutterer <peter.hutterer at who-t.net> writes:
> >> To find the ID reliably. Is this the right way to do it? Is there
> >> perhaps a better way with udev/systemd?
> > what do you use for configuring and why do you need the ID specifically? if
> > you use xinput to configure things, you can use the device name as well.
> > xinput set-prop "some device name" "some property name" 1 2 3
> A typical use case is to set the coordinate transformation matrix for
> touchscreens in multihead setups.
> In the likely situation that the touchscreens are of the same type they
> will have the same device name, so you need to fish out the
> corresponding /dev/input/event* device node and pass it to udevadm info
> (assuming that the server is local) to E.G. key off the ID_PATH
> (E.G. the USB port the touchscreen is connected to).
yeah, fair enough but that's not what I suspected from the original message
(Kai only talks of a single device, afaict).
related question for this case though: would xinput get-id call be
interesting then? e.g. for two touchscreens you'd get
$ xinput get-id "touchscreen"
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