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I'm trying to set xinput properties for a USB input device whenever it is connected. I have seen solutions that require a script to run in the background and poll USB devices, but I would like to find a triggered approach rather than one involving user-space polling.

I have tried creating a udev rule that runs a script on device connection, but it appears that the connected device is not yet visible to xinput when the udev add rule is triggered. This appears to be a constant order of events rather than a race condition as adding a sleep command to the script also delays the device being listed in xinput list.

Is there any reliable method of setting xinput properties for devices when they are connected?

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The normal method is to write an xorg.conf file, use the InputClass matching methods, and set properties directly in xorg.conf. No script, no race condition, no explicit meddling with udev; it just works, though it doesn't use xinput directly...

See man xorg.conf for details.

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