On Thu, 13 Mar 2008, Steven M. Bellovin wrote:
I haven't seen that, but I upgraded my kernel and xorg on my laptop a week ago (before that, I'd been running a Feb 9 kernel) and since then I've been quite unhappy with responsiveness. When I can see text rendering, on a fast machine, something's wrong. And there's a noticeable lag between when I type a character (especially into my mailer) and when I see the echo. It's not quite the same as what you're seeing, but I've been wondering about scheduler changes.
I had this issue months ago after updating to Xorg 1.3.0. Not sure if this works with the nVidia driver, but:
Option "AccelMethod" "XAA" In the "Device" section was the fix for the intel driver. Cheers, Jared