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I finally did install Ubuntu 14.04 on my Asus notebook. Now, my laptop is on dual-boot Windows7 and Ubuntu. All is working well, however, after getting the updates sudo apt-get update and setting up the wireless connection, I noticed something very strange and annoying: as my laptop is connected, if I try to move through the rooms I lose the Internet signal.

If I boot to Windows, at the same distance, I get the internet signal very well. In summary :

  • From 2 m off the router : Ubuntu and W7 both receives well
  • From 8 m or more off the router: W7 receives normally and Ubuntu receives nothing and gets disconnected.

lspci -nn -d 14e4:

02:00.0 Network controller [0280]: Broadcom Corporation BCM43142 802.11b/g/n [14e4:4365] (rev 01)

uname -a

Linux azzed-Ubu 3.13.0-44-generic #73-Ubuntu SMP Tue Dec 16 00:22:43 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

iwconfig

eth0      no wireless extensions.
lo        no wireless extensions.
wlan0     IEEE 802.11abg  ESSID:"ZTE"  
          Mode:Managed  Frequency:2.447 GHz  Access Point: 00:15:EB:F6:2F:DC   
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Power Management:off
Fabby
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Nepto.py
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  • bcm...? Please add the complete driver/module name to your question. – s3lph Jan 22 '15 at 17:46
  • First, thank you for helping me. Here is the full name: Broadcom 802.11 Linux STA wireless driver source from bcmwl-kernel-source (prorietary).Please don't hesitate to ask me more details If you wish – Nepto.py Jan 22 '15 at 19:18
  • proprietary source repository? Isn't that a contrary in itself? In the future, please use the edit function to add details to your question. – s3lph Jan 22 '15 at 21:41
  • I am new on Ubuntu. I tried other things to try to recover the Wifi signal. I tried to remove the default driver and installing afterwards linux-firmware-nonfree and load the b43 module. But nothing happened, as my Wifi signal is still very poor. After I tried to update to kernel 3.17 but things get worse as my Wifi router ain't shown anymore, so I have to uninstall it i think. Any suggestions if you can. – Nepto.py Jan 23 '15 at 10:47
  • I've juste removed the 3.17 version and now I'm on the 3.13 version. Wifi signal is back now but still very very poor unfortunately. Any suggestions please? – Nepto.py Jan 23 '15 at 11:00
  • possible duplicate of Installing Broadcom Wireless Drivers – Fabby Jan 23 '15 at 22:06
  • Use the above resource wisely and follow it to the letter (which means: find a cable and remove the driver you have) and then go to the link above and very carefully follow the instructions over there. If something is out of the ordinary in the steps you take there, drop a comment here @Fabby – Fabby Jan 23 '15 at 22:07
  • Thank you for your help. To be honest I don't know exactly what to do, I installed the driver wireless for BCM43142 but got confused after reading the Readme.txt. I tried also the build-dep linux but nothing happened. I still have very poor wifi signal strenght (always 2 bars lesser than windows). – Nepto.py Jan 24 '15 at 09:47
  • @Fabby - I did try almost all the instructions, I used the following : sudo apt-get remove bcmwl-kernel-source && install bcmwl-kernel-source. Nothing changed. I removed the same kernel and tried filmaware-b43-installer && fwcutter and blacklister b43xx. nothing changed. I tried other stuff, but always the same. I dont know my pbm is a bit odd, all is working well but the signal strength is never more than 2 bars near the router. I have a BCM3142 / driver : wl. – Nepto.py Jan 25 '15 at 08:44
  • what's the output of lspci -nn -d 14e4: – Fabby Jan 25 '15 at 09:29
  • @Fabby I put the output above on the main question. – Nepto.py Jan 25 '15 at 10:26
  • Nepto.py: Upvoted your question and getting some expert help... @Chili555: care to have a look? – Fabby Jan 25 '15 at 10:54
  • @Nepto.py Is the performance the same, better or worse with N speeds turned off in the router? – chili555 Jan 25 '15 at 22:38
  • I cant find this N speeds, I scanned all the page but I didn't find it. Is it related to the beacon Interval (ms) [20 - 1000]? – Nepto.py Jan 25 '15 at 23:14

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