Same problem with a Dell 630m.
I have the feeling it is related to the use of an external USB Logitech
mouse (I have another no-name mouse which doesn't seem to trigger the
same bug). If the plug state of the mouse is different between before
sleep and after resume, the (internal) keyboard and touchpad are not
"seen".
What is even more strange is that all pressed keys are still kept in "a
queue"; as soon as I managed to log-in again on the screen-saver, the keys are
applied (i.e. Fn+sleep, power button, shortcuts, ...). I also noticed that
after the problem occurred, the special shortcut Fn+F3 (Battery status) no
longer works and there is the following message in kern.log:
atkbd.c: Use 'setkeycodes e007 <keycode>' to make it known.
atkbd.c: Unknown key pressed (translated set 2, code 0x89 on isa0060/serio0).
If I close the cover of the laptop, wait until it goes into sleep mode
and then open it again, keyboard is back.
** Changed in: linux-source-2.6.20 (Ubuntu)
Status: Unconfirmed => Confirmed
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regression: Keyboard + Synaptic Touchpad randomly do not return from suspend on
Dell 640m
https://bugs.launchpad.net/bugs/99755
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