[Bug 32316] Severe glitches with KMS + external monitor

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=32316

--- Comment #12 from Alex Deucher <agd5f at yahoo.com> 2010-12-17 09:16:23 PST ---
(In reply to comment #11)
> Just to make sure I'm being clear: I also don't have a problem with high
> resolution if I'm using UMS. It's only with KMS that it's a problem. I don't
> know enough to judge whether the bandwidth demands would be expected to be
> higher under KMS than UMS.

The memory usage patterns are different and likely higher under KMS.  Do you
still have the problems with KMS if you disable accel?
Option "NoAccel" "True"
in the device section of your xorg.conf

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