docs/debugging: explain how to enable logging on the fly

diff --git a/docs/debugging b/docs/debugging
index b97d7d56f41dcf43d73e05f1c60128421c56739c..19812f78e39ba9598e5a599312d5e77f1b30ef45 100644 (file)
--- a/docs/debugging
+++ b/docs/debugging
@@ -57,6 +57,13 @@ list of sessions in your desktop manager (gdm, lxdm, …), edit
 Exec=i3 --shmlog-size=26214400
 ------------------------------
 
+If you cannot restart i3 for some reason, you can enable debug logging on the
+fly:
+
+---------------------------------------
+i3-msg 'debuglog on; shmlog on; reload'
+---------------------------------------
+
 == Obtaining the debug logfile
 
 No matter whether i3 misbehaved in some way without crashing or whether it just