<html>
<head>
<base href="https://bugs.freedesktop.org/" />
</head>
<body>
<p>
<div>
<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO --- - KDE Konsole very slow scrolling with TearFree and QT graphics system native"
href="https://bugs.freedesktop.org/show_bug.cgi?id=77436#c80">Comment # 80</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO --- - KDE Konsole very slow scrolling with TearFree and QT graphics system native"
href="https://bugs.freedesktop.org/show_bug.cgi?id=77436">bug 77436</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>If you try:
diff --git a/src/sna/gen7_render.c b/src/sna/gen7_render.c
index 3fcca3e..f0e68a2 100644
--- a/src/sna/gen7_render.c
+++ b/src/sna/gen7_render.c
@@ -2858,6 +2858,8 @@ prefer_blt_copy(struct sna *sna,
struct kgem_bo *dst_bo,
unsigned flags)
{
+ return true;
+
if (sna->kgem.mode == KGEM_BLT)
return true;
does that prevent the lag?
And in particular,
diff --git a/src/sna/gen7_render.c b/src/sna/gen7_render.c
index 3fcca3e..41950ed 100644
--- a/src/sna/gen7_render.c
+++ b/src/sna/gen7_render.c
@@ -2965,8 +2965,7 @@ fallback_blt:
if (too_large(extents.x2-extents.x1, extents.y2-extents.y1))
goto fallback_blt;
- if (can_switch_to_blt(sna, dst_bo, flags) &&
- sna_blt_copy_boxes(sna, alu,
+ if (sna_blt_copy_boxes(sna, alu,
src_bo, src_dx, src_dy,
dst_bo, dst_dx, dst_dy,
dst->drawable.bitsPerPixel,</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>