diff -Nru debtags-1.9+git20120312/debian/changelog debtags-1.9+git20120320/debian/changelog
--- debtags-1.9+git20120312/debian/changelog	2012-03-12 10:09:41.000000000 +0000
+++ debtags-1.9+git20120320/debian/changelog	2012-03-20 07:53:34.000000000 +0000
@@ -1,3 +1,12 @@
+debtags (1.9+git20120320) precise; urgency=low
+
+  * New git snapshot:
+    - use explit libGL.so.1 and libX11.so.6 to ensure that
+      cdll.LoadLibrary() finds them
+    - if the opengl backend returns "None" return HardwareSupported.UNKNOWN
+
+ -- Michael Vogt <michael.vogt@ubuntu.com>  Tue, 20 Mar 2012 08:52:33 +0100
+
 debtags (1.9+git20120312) precise; urgency=low
 
   * New git snapshot:
diff -Nru debtags-1.9+git20120312/debtagshw/detectors.py debtags-1.9+git20120320/debtagshw/detectors.py
--- debtags-1.9+git20120312/debtagshw/detectors.py	2012-03-12 09:27:05.000000000 +0000
+++ debtags-1.9+git20120320/debtagshw/detectors.py	2012-03-20 07:52:14.000000000 +0000
@@ -207,9 +207,9 @@
         if tag in self.TAG_TO_FUNC:
             func = self.TAG_TO_FUNC[tag]
             res = func()
-            if res:
+            if res is True:
                 return HardwareSupported.YES
-            else:
+            elif res is False:
                 return HardwareSupported.NO
         return HardwareSupported.UNKNOWN
     
diff -Nru debtags-1.9+git20120312/debtagshw/opengl.py debtags-1.9+git20120320/debtagshw/opengl.py
--- debtags-1.9+git20120312/debtagshw/opengl.py	2012-03-12 10:09:46.000000000 +0000
+++ debtags-1.9+git20120320/debtagshw/opengl.py	2012-03-20 07:52:14.000000000 +0000
@@ -32,7 +32,7 @@
 
     # 3d driver detection data, map render/vendor string to driver
     RENDERER_TO_DRIVER = [
-        # from unity_support_test.c
+        # from tools/unity_support_test.c in the nux-tools pkg
         ("Software Rasterizer", "sw"),
         ("Mesa X11", "sw"),
         ("on softpipe", "sw"),
@@ -78,15 +78,15 @@
         # tricks with  /etc/ld.so.conf.d/x86_64-linux-gnu_GL.conf to
         # make it the default libGL.so but apparently the cdll.LoadLibrary
         # does not support the ld.so.conf.d directory (yet?)
-        if os.path.exists("/usr/lib/fglrx/libGL.so"):
-            return "/usr/lib/fglrx/libGL.so"
-        return "libGL.so"
+        if os.path.exists("/usr/lib/fglrx/libGL.so.1"):
+            return "/usr/lib/fglrx/libGL.so.1"
+        return "libGL.so.1"
 
     def _get_opengl_vendor_renderer_version_tuple(self):
         """ returns a vendor, renderer, version tuple """
         from ctypes import cdll, c_char, c_char_p, c_int, byref
         # load stuff
-        x11 = cdll.LoadLibrary("libX11.so")
+        x11 = cdll.LoadLibrary("libX11.so.6")
         glx = cdll.LoadLibrary(self._find_opengl_lib_path())
         # get display
         display = x11.XOpenDisplay("")
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