I have lenovo Z580 laptop and dual-booted my system with windows 8 and ubuntu 13.04. I can connect to internet using windows 8(both wired & wireless) but cannot connect using ubuntu(both). It always shows me that "I am in offline mode"
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have you installed latest updates? – dedunu Jul 02 '13 at 05:44
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I tried solution and this is the reply: 04:00.0 Network controller [0280]: Broadcom Corporation BCM4313 802.11b/g/n Wireless LAN Controller [14e4:4727] (rev 01) – Jul 02 '13 at 15:13
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@UbuntuUser I recommend seeing this answer http://askubuntu.com/a/60395/7035 Take it easy, read carefully and you should have a working Wireless card in no time. The one you have is the same one I have. – Luis Alvarado Jul 02 '13 at 16:39
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It looks like your laptop might use the infamous Broadcom chipset 14e4:4727, which needs special attention.
From http://ubuntuforums.org/showthread.php?t=2092561,
Try running
lspci -nn | grep 0280
If your device is the Broadcom 14e4:4727, then run
sudo apt-get install --reinstall bcmwl-kernel-source
To re-install the drivers. Then reboot and try the connection again.
Travis G.
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