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            <b><a class="bz_bug_link 
          bz_status_REOPENED "
   title="REOPENED --- - x11-drivers/xf86-video-intel-2.21.4 and transparency"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=62198#c21">Comment # 21</a>
              on <a class="bz_bug_link 
          bz_status_REOPENED "
   title="REOPENED --- - x11-drivers/xf86-video-intel-2.21.4 and transparency"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=62198">bug 62198</a>
              from <span class="vcard"><a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> <span class="fn">Chris Wilson</span></a>
</span></b>
        <pre>Do you mind doing a bit of detective work, and going through
src/sna/gen3_render.c and disable each sse routine individually, like:

diff --git a/src/sna/gen3_render.c b/src/sna/gen3_render.c
index 59d13db..fd7c13d 100644
--- a/src/sna/gen3_render.c
+++ b/src/sna/gen3_render.c
@@ -3666,7 +3666,7 @@ gen3_render_composite(struct sna *sna,
                case SHADER_WHITE:
                case SHADER_CONSTANT:
 #if defined(sse2) && !defined(__x86_64__)
-                       if (sna->cpu_features & SSE2) {
+                       if (sna->cpu_features & SSE2 && 0) {
                                tmp->prim_emit =
gen3_emit_composite_primitive_c
                                tmp->emit_boxes =
gen3_emit_composite_boxes_cons
                        } else

Then when you find the one that is responsible for the error, please let me
know and please attach your src/sna/.libs/gen3_render.o</pre>
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