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since I installed ubuntu on my lenovo I can only get wireless internet for about 5 minutes after I restart my computer, and then it just stops responding. My network security is WEP and ethernet connection is good. I'd be great to fix this issue.

sky
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  • Neither WEP or WPA is wireless network security, and should NOT be used EVER. Use either WPA2* or (preferably) EAP/RADIUS authentication.* – david6 Mar 28 '15 at 06:31
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    To assist you, you need to provide more details. What is the output from lsusb, that relates to the Wireless device? Or provide details from sudo lshw that identify the wireless chipset. – david6 Mar 28 '15 at 06:33
  • @david6 lsusb is Bus 002 Device 004: ID 0bda:b728 Realtek Semiconductor Corp. Bus 002 Device 003: ID 5986:055d Acer, Inc Bus 002 Device 002: ID 0438:7900 Advanced Micro Devices, Inc. Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 001 Device 003: ID 0bda:0129 Realtek Semiconductor Corp. RTS5129 Card Reader Controller Bus 001 Device 002: ID 0438:7900 Advanced Micro Devices, Inc. Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub – sky Mar 28 '15 at 22:39
  • Device ID 0bda:b728 suggests you should try: http://askubuntu.com/questions/590414/wifi-problems-with-rtl8723be-in-ubuntu-14-04 – david6 Mar 29 '15 at 04:52

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I believe this has been answered before.

First, open a Terminal window (Ctrl Alt T), then type the following:

    rfkill list

If it shows up to be softblocked, then try:

    rfkill unblock all

If it shows up to be hardblocked and any and all wireless switches on your laptop are ON, then there is a conflict between Linux and your BIOS. I have such a conflict on my own Toshiba Satellite, and solved it with the following steps:

First, make sure your Wi-Fi (or any wireless) switch is ON before booting. The BIOS will see it on and leave it that way. Never use 'Fn + F8' or any other methods to turn off the wireless. Use Ubuntu's built-in soft methods instead - that is, by clicking on the icon in the top-left of your screen.

  • 0: hci0: Bluetooth Soft blocked: no Hard blocked: no 1: phy0: Wireless LAN Soft blocked: no Hard blocked: no rfkill list output – sky Mar 28 '15 at 22:45