I am experiencing something similar in Intrepid with kernel
2.6.27-4-generic, on a Macbook Air 1,1.

The problem seems to only occur after resume from suspend to ram. The
key strokes are never lost, only strangely delayed into X, or out to the
screen. Typing in an xterm for intance, it happens every now and then
that nothing is seen, until either return or backspace is pressed (works
50%), or a change to and back from another window is made with Alt-Tab
(works 100%). I have not been able to distinguish yet whether the events
enter X but are not displayed, or if they get stuck on the way to X.
Maybe one hint is that moving over to a text console, some parts of the
present page takes a while to update; thus it might be a graphics
problem, but I could not tell for sure.

I am attaching the output of dmesg and Xorg after resume. (the stack
trace is due to the new wl driver, I doubt that is the problem here)


** Attachment added: "dmesg-and-xorg-after-resume.dat"
   http://launchpadlibrarian.net/17932358/dmesg-and-xorg-after-resume.dat

-- 
suddenly keyboard event recognition gets really slow
https://bugs.launchpad.net/bugs/227359
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