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<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#c120">Comment # 120</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>Maybe something like:
diff --git a/src/sna/sna_display.c b/src/sna/sna_display.c
index 9c24ea6..6835bda 100644
--- a/src/sna/sna_display.c
+++ b/src/sna/sna_display.c
@@ -6495,6 +6495,7 @@ fixup_flip:
mode = KGEM_BLT;
DBG(("%s: marking flip bo as
busy [%x -> mode=%d]\n", __FUNCTION__, busy.busy, mode));
kgem_bo_mark_busy(&sna->kgem,
flip_bo, mode);
+ sna->kgem.need_throttle = true;
} else
__kgem_bo_clear_busy(flip_bo);
}
@@ -6511,6 +6512,11 @@ fixup_flip:
assert(old->refcnt >= 1);
set_shadow(sna, region);
}
+
+ if (sna->kgem.need_throttle) {
+ drmCommandNone(sna->kgem.fd,
DRM_IOCTL_I915_GEM_THROTTLE);
+ sna->kgem.need_throttle = false;
+ }
} else
kgem_submit(&sna->kgem);</pre>
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