I'm sorry to report that, at least with 2.6.24-19-generic, turning off
libata's acpi in /etc/modprobe.d/options doesn't seem to be enough.  If
I eject the laptop from the dock once before suspending, all seems to be
well (so far), but if I just boot up in the dock and suspend, I get the
same old blinking cursor upon resume.

The other odd effect I'm seeing is that when resume fails, I find that
my bluetooth is off when I reboot and the login screen comes up on my
laptop's display instead of on the two monitors connected to my dock.
The only explanation I can think of for that would be that my undocking
script (which, among other things, turns off bluetooth and the external
monitors) is somehow running upon suspend, but I see no evidence in the
logs to support that theory.

-- 
[regression] Dock with USB devices + suspend == resume fails
https://bugs.launchpad.net/bugs/218760
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