[Bug 77436] KDE Konsole very slow scrolling with TearFree and QT graphics system native

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=77436

--- Comment #7 from Chris Wilson <chris at chris-wilson.co.uk> ---
Do you have sysrq enabled? It would be great to get a kernel stacktrace to see
where that iowait is coming from (sysrq-T). If the cursor stops moving, we have
serious problems, it suggests that X is being trapped in a throttle() waiting
for the GPU.

One thing to try for poor GPU performance is my branch
http://cgit.freedesktop.org/~ickle/linux-2.6/ #bug77436

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