diff --git a/case-lib/lib.sh b/case-lib/lib.sh
index 3e6e4505..55e20762 100644
--- a/case-lib/lib.sh
+++ b/case-lib/lib.sh
@@ -309,11 +309,11 @@ get_ldc_subdir()
 {
     local subdir='intel/sof' # default
     local fw_path
-    local fw_path_info='/sys/kernel/debug/sof/fw_path'
+    local fw_path_info='/sys/kernel/debug/sof/fw_profile/fw_path'
 
     # either $fw_path_info exists, OR we redefine $fw_path_info with
     # the backwards-compatible alternative based on kernel parameter
-    test -e $fw_path_info ||
+    sudo test -e $fw_path_info ||
 	fw_path_info='/sys/module/snd_sof_pci/parameters/fw_path'
 
     if fw_path=$(sudo cat $fw_path_info); then