CONTRIBUTING.md: add note on libinput debug-events

diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 2e317c9ab7a97f5b196b754a64d0ddf6b2e6ccf2..a9f6149d8b9dc7e1ef437c94689eff85d640aa79 100644 (file)
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -31,6 +31,8 @@ For some types of bugs, it might be useful to find out which mesa driver (.so) y
 
 You can also get some useful system info with [drm_info](https://github.com/ascent12/drm_info)
 
+Use `sudo libinput debug-events` to show input events.
+
 ## Packaging
 
 Some distributions carry labwc in their repositories or user repositories.