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This problem is already solved on the first post: I spent so long trying to solve it that I thought people should know the solution.
I have a Lenovo X100e with a Realtek 8192SE wireless card. I'm running kernel 3.0. The machine has, since upgrading to the 3.0 kernel had the annoying problem of failing wireless connections after suspending: I'll have a running wireless connection, then suspend the machine, and then wake the machine up and the machine cannot connect to any wireless network (perhaps the same one I was connected to before, in the same place).
Things that did not work:
Installing the Realtek drivers from their website
Downgrading the kernel from 3.1 to 3.0
Using wicd instead of networkmanager
Walking around
Other distributions
The solution was to put an entry in /etc/pm/config.d/config:
SUSPEND_MODULES="rtl8192se rtlwifi mac80211 cfg80211"Now the machine reconnects with no problems.
This may be the solution to the other big problem I was having with the 3.1 kernel: I would suspend the machine by any means and the screen goes black and the machine becomes non-responsive without actually suspending. I may try upgrading to the 3.1 kernel and adding radeon to the SUSPEND_MODULES list above.
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