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When I put my pc to sleep or hibernate, after that when I open(wakeup) Ubuntu. My wireless connection cannot connect to internet.

So in this case I need to restart again... what is the solution?

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Can you add some hardware information to your question? –  Jorge Castro Jun 7 '11 at 3:02
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2 Answers

try this:

Here is a technique that works for many. Please open Applications > Accessories > Terminal and do:

Code:

sudo lshw -C network

You will learn details about your wired and wireless card. For example, here is my wireless detail. You need the exact name of your wireless driver.

Quote:

*-network
description: Wireless interface
product: PRO/Wireless 3945ABG [Golan] Network Connection
vendor: Intel Corporation
--- snip ---
configuration: broadcast=yes driver=iwl3945 ip=192.168.1.108

Next do:

Code:

sudo gedit /etc/pm/config.d/config

The text editor gedit will open. Type in:

Code:

SUSPEND_MODULES="iwl3945"

Substitute the driver name you found. Proofread carefully, save and close gedit.

Suspend and report your success.

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Did not work for me :( –  Colleen Jun 19 '12 at 14:37
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I have a sony vaio vpc and have experienced the same problem. One thing that seems to work consistently is turning of my wireless before I suspend. My laptop has a button for this, so I just have to flick the switch. When I come back from suspend, I turn the wireless back on once I have logged in.

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