DEBUG.md: add "Logs from PipeWire (wireplumber)" section

Signed-off-by: Jaroslav Kysela <perex@perex.cz>

diff --git a/ucm2/DEBUG.md b/ucm2/DEBUG.md
index 662b46fa48b81518b5e3a49fa206ad9d6b0862e9..40a279723c11c5072eae5ad589cda55f7f025a77 100644 (file)
--- a/ucm2/DEBUG.md
+++ b/ucm2/DEBUG.md
@@ -105,6 +105,18 @@ To check the configuration syntax, use `alsaucm -c hw:0 dump text` command
 (replace zero with the corresponding ALSA card number). This command should
 not return an error.
 
+Logs from PipeWire (wireplumber)
+--------------------------------
+
+````
+systemctl --user stop wireplumber
+WIREPLUMBER_DEBUG="spa.*:5" wireplumber
+````
+
+The alsa-ucm.c lines shows the selected and enabled devices in runtime.
+You may redirect the log output to a file and use a grep or another tool
+to filter them.
+
 Notes
 -----