diff --git a/level_zero/tools/source/sysman/standby/linux/os_standby_imp.cpp b/level_zero/tools/source/sysman/standby/linux/os_standby_imp.cpp
index 47b0cc7116..48581dca0a 100644
--- a/level_zero/tools/source/sysman/standby/linux/os_standby_imp.cpp
+++ b/level_zero/tools/source/sysman/standby/linux/os_standby_imp.cpp
@@ -56,10 +56,12 @@ ze_result_t LinuxStandbyImp::getMode(zet_standby_promo_mode_t &mode) {
 }
 
 ze_result_t LinuxStandbyImp::setMode(zet_standby_promo_mode_t mode) {
-    if (ZET_STANDBY_PROMO_MODE_DEFAULT == mode) {
-        return pSysfsAccess->write(standbyModeFile, standbyModeDefault);
-    }
-    return pSysfsAccess->write(standbyModeFile, standbyModeNever);
+    // standbyModeFile is not writable.
+    // Mode cannot be set from L0.
+    // To set the mode, user must reload
+    // the i915 module and set module parameter
+    // enable_rc6 appropriately.
+    return ZE_RESULT_ERROR_UNSUPPORTED_FEATURE;
 }
 
 LinuxStandbyImp::LinuxStandbyImp(OsSysman *pOsSysman) {