Binary package hint: linux-source-2.6.22
The Dell Latitude D620 fails to wake up after being suspended, running an up-to-date Gutsy. This is with no changes to /etc/default/acpi-support.
After selecting System->Quit->Suspend:
o the laptop quickly goes to sleep.
o The Power LED slowly pulses, indicating sleep.
Upon opening the lid or pressing the power button:
o the laptop powers up and there's a bit of disk activity
o the screen flickers once
o Yellow text "Linu" is displayed in the upper-left corner.
o All disk activity stops, and the machine hangs there.
There is no response to Ctrl-Alt-Del, or Ctrl-Alt-Backspace. I can't Alt-Fx to a text console. X never even appears, and the only way to reboot is by holding down the power button (equivalent to pulling the plug on a desktop).
Hibernate works, although I get a blank "notification" window in the bottom right of my screen after waking up. That may be the "Your machine failed to hibernate" notification, but since the window is blank and does not repaint itself before vanishing, I can't be sure. After waking from Hibernate, if my screen is not locked, I am asked to re-unlock gnome-keyring.
I will experiment with acpi-support settings and post my results here.
Linux d620 2.6.22-14-generic #1 SMP Sun Oct 14 23:05:12 GMT 2007 i686 GNU/Linux