<html>
<head>
<base href="https://bugs.freedesktop.org/" />
</head>
<body>
<p>
<div>
<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [dragonflyBSD] Massive display corruption with xf86-video-intel 2.99.917"
href="https://bugs.freedesktop.org/show_bug.cgi?id=87578#c3">Comment # 3</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [dragonflyBSD] Massive display corruption with xf86-video-intel 2.99.917"
href="https://bugs.freedesktop.org/show_bug.cgi?id=87578">bug 87578</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>There are so many potential failures here, that unless DragonFly also has a
comprehensive error capture any guess is likely to be a red herring.
For example, it might be that LLC is comprehensively broken and ignoring it is
the best approach:
diff --git a/src/sna/kgem.c b/src/sna/kgem.c
index 78ed540..579eb6c 100644
--- a/src/sna/kgem.c
+++ b/src/sna/kgem.c
@@ -70,7 +70,7 @@ search_snoop_cache(struct kgem *kgem, unsigned int num_pages,
#define DBG_NO_CREATE2 0
#define DBG_NO_USERPTR 0
#define DBG_NO_UNSYNCHRONIZED_USERPTR 0
-#define DBG_NO_LLC 0
+#define DBG_NO_LLC 1
#define DBG_NO_SEMAPHORES 0
#define DBG_NO_MADV 0
#define DBG_NO_UPLOAD_CACHE 0
Or that may just be fixing the symptoms and not the root cause.</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are the QA Contact for the bug.</li>
</ul>
</body>
</html>