--- xfce4-battery-plugin.orig/panel-plugin/libacpi.c	2007-04-29 03:53:18.481075471 +0200
+++ xfce4-battery-plugin/panel-plugin/libacpi.c	2007-04-29 03:49:09.519056188 +0200
@@ -190,7 +190,8 @@
 #ifdef __linux__
   FILE *acpi;
 
-  if (!(acpi = fopen ("/proc/acpi/info", "r")))
+  if (!(acpi = fopen ("/proc/acpi/info", "r")) &&
+     !(acpi = fopen ("/sys/module/acpi/parameters/acpica_version", "r")))
   {
 #ifdef DEBUG
 	  printf("DBG:no acpi: /proc/acpi/info not found!\n");