I finally got a reply from peter on this a little while ago...
From: Peter Hutterer <[email protected]>
Sorry, this one nearly got lost.
Bryce Harrington wrote:
> We've been noticing that there is occasionally a slight but noticeable
> delay after resuming from suspend before keyboard input is accepted,
> which we've traced to the EvdevReopenTimer() routine (commit
> 32768f8acd49f49a3daa7965fc2672ca13306780).
>
> Could you explain what causes the file descriptor to be openable but
> not able to be read? Is there a way the lag could be reduced, if not
> eliminated?
Don't know, but the kernel that shipped with F9 had this quite frequently.
I don't see this happening anymore, so you can try ripping out the timer
code and see if it just comes back most of the time anyway.
** Changed in: xserver-xorg-input-evdev (Ubuntu)
Importance: Undecided => Medium
** Changed in: xserver-xorg-input-evdev (Ubuntu)
Status: New => Confirmed
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Keyboard/mouse unresponsive for several seconds after resume
https://bugs.launchpad.net/bugs/346310
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