commit 73dab75b4165f7d2214a68d4ba8e3cb7aab9b4ac
Author: Zhenyu Wang <zhenyuw@linux.intel.com>
Date:   Sun Sep 26 13:15:39 2010 +0800

    i965: fallback lineloop on sandybridge for now
    
    Until we fixed GS hang issue.

diff --git a/src/mesa/drivers/dri/i965/brw_draw.c b/src/mesa/drivers/dri/i965/brw_draw.c
index 16331cc..6a4dda2 100644
--- a/src/mesa/drivers/dri/i965/brw_draw.c
+++ b/src/mesa/drivers/dri/i965/brw_draw.c
@@ -204,6 +204,13 @@ static GLboolean check_fallbacks( struct brw_context *brw,
    GLcontext *ctx = &brw->intel.ctx;
    GLuint i;
 
+   /* XXX FIXME */
+   if (brw->intel.gen >= 6) {
+       for (i = 0; i < nr_prims; i++)
+	   if (prim[i].mode == GL_LINE_LOOP)
+	       return GL_TRUE;
+   }
+
    /* If we don't require strict OpenGL conformance, never 
     * use fallbacks.  If we're forcing fallbacks, always
     * use fallfacks.