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I tried the following command:

sudo apt-get install --reinstall bcmwl-kernel-source

Wireless worked for sometime but after reboot WiFi stopped again.

Can someone please help?

Software center in additional drivers says:

Broadcom Corporation: Wireless 1704802.11n + BT 4.0 This device is using an alternative driver Using Broadcom 802.11 Linux STA wireless driver source from bcmwl-kernel-source (proprietary)

What is the alternative driver? And how to find it?

Also, do help resolve this issue fast.

Kaz Wolfe
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Radhika Ajgaonkar
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  • what is the output of `sudo lspci`? – sbergeron Aug 16 '14 at 17:27
  • Please run the script that is in the accepted answer in the link below so we may see the information needed to help diagnose the issue. – Wild Man Aug 16 '14 at 18:59
  • Output of sudo lspci 00:1f.2 SATA controller: Intel Corporation 7 Series Chipset Family 6-port SATA Controller [AHCI mode] (rev 04) 00:1f.3 SMBus: Intel Corporation 7 Series/C210 Series Chipset Family SMBus Controller (rev 04) 07:00.0 Network controller: Broadcom Corporation BCM43142 802.11b/g/n (rev 01) 09:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 07) – Radhika Ajgaonkar Aug 17 '14 at 12:47
  • http://pastebin.ubuntu.com/8071047/ – Radhika Ajgaonkar Aug 17 '14 at 12:52
  • The following worked for me on 12.04 LTS http://unix.stackexchange.com/questions/69199/wireless-not-working-after-update-network-unclaimed –  Aug 20 '14 at 15:59

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