diff --git a/case-lib/lib.sh b/case-lib/lib.sh
index 13c5b350..86fceadf 100644
--- a/case-lib/lib.sh
+++ b/case-lib/lib.sh
@@ -1,7 +1,7 @@
 #!/bin/bash
 
 # get test-case information
-SCRIPT_HOME="$(dirname "$0")"
+SCRIPT_HOME="$(dirname "${BASH_SOURCE[0]}")"
 # get test-case parent folder name
 SCRIPT_HOME=$(cd "$SCRIPT_HOME/.." && pwd)
 # shellcheck disable=SC2034 # external script can use it
@@ -162,6 +162,42 @@ func_lib_check_sudo()
     }
 }
 
+systemctl_show_pulseaudio()
+{
+    printf '\n'
+    local domain
+    for domain in --system --global --user; do
+        ( set -x
+          systemctl "$domain" list-unit-files --all '*pulse*'
+        ) || true
+        printf '\n'
+    done
+
+    printf 'For %s ONLY:\n' "$(id -un)"
+    ( set -x
+      systemctl --user list-units --all '*pulse*'
+    ) || true
+    printf '\n'
+
+    # pgrep ouput is nicer because it hides itself, however pgrep does
+    # not show a critical information: the userID which can be not us
+    # but 'gdm'!
+    # shellcheck disable=SC2009
+    ps axu | grep -i pulse
+    >&2 printf 'ERROR: %s fails semi-randomly when pulseaudio is running\n' \
+        "$(basename "$0")"
+
+    >&2 printf '\nTry: sudo systemctl --global mask pulseaudio.{socket,service} and reboot.
+    --global is required for session managers like "gdm"
+'
+    # We cannot suggest "systemctl --user mask" for a 'gdm' user
+    # because we can't 'su' to it and access its DBUS, so we suggest
+    # --global to keep it simple. If --global is too strong for you, you
+    # can manually create a
+    # /var/lib/gdm3/.config/systemd/user/pulseaudio.service -> /dev/null
+    # symlink
+}
+
 declare -a PULSECMD_LST
 declare -a PULSE_PATHS
 
diff --git a/tools/kmod/sof_remove.sh b/tools/kmod/sof_remove.sh
index 7647fd53..9c95adad 100755
--- a/tools/kmod/sof_remove.sh
+++ b/tools/kmod/sof_remove.sh
@@ -2,6 +2,12 @@
 # SPDX-License-Identifier: BSD-3-Clause
 # Copyright(c) 2018 Intel Corporation. All rights reserved.
 
+
+TOPDIR=$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)
+
+# shellcheck source=case-lib/lib.sh
+source "$TOPDIR"/case-lib/lib.sh
+
 remove_module() {
 
     local MODULE="$1"
@@ -22,9 +28,7 @@ exit_handler()
     # warn about any running pulseaudio because it could make us fail
     # the next time.
     if pgrep -a pulseaudio; then
-        >&2 printf 'ERROR: %s fails semi-randomly when pulseaudio is running\n' \
-               "$(basename "$0")"
-        systemctl --user list-units --all '*pulse*' || true
+        systemctl_show_pulseaudio
     fi
 
     if test "$exit_status" -ne 0; then