Public bug reported:

The /etc/init.d/ltsp-client script contains a logic error, which causes
a sound error to always be reported. The test -f /dev/dsp always fails,
as /dev/dsp is never a regular file. Suggest applying the following
patch, which checks if /dev/dsp is a special character device and
writeable.

--- ltsp-client.orig    2006-08-20 05:46:30.931866790 +0000
+++ ltsp-client 2006-08-20 05:37:48.950284469 +0000
@@ -30,8 +30,8 @@
 start_sound() {
     if [ -n "$SOUND" ]; then
         # Detect and report a common problem with thin clients
-               if [ ! -f /dev/dsp ]; then
-                   echo "Sound requested but /dev/dsp is missing.  Continuing."
+               if [ ! -c /dev/dsp -o ! -w /dev/dsp ] ; then
+                   echo "Sound requested but /dev/dsp is missing or read-only. 
 Continuing."
                fi
                case "$SOUND_DAEMON" in
            esd|'') # The default when no value is set

** Affects: ltsp (Ubuntu)
     Importance: Untriaged
         Status: Unconfirmed

-- 
Sound setupo always reports error
https://launchpad.net/bugs/56959

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