I've recently installed Ubuntu 17.10 on a Macbook Pro (Mid 2012). It's not dual boot so is my only os. I've noticed a few problems with the internet connection, the first being that I am only averaging around 20mb download speeds when I was receiving my usual 80mp/s on Mac OS and this is still the case when doing a speed test on my iPhone and android tablet.

The other issue is that my wireless internet connection will die after awhile, sometimes after 2 mins, sometimes 2 hours, requiring a reboot to restore the signal.

I'm quite computer literate, but linux is completely new to me so when searching for solutions, although I can find similar problems, I can't seem to find a solution for my particular wireless adapter. Is there anybody willing to reply with a step by step guide to a solution? I would really appreciate it. I'm enjoying my linux experience so far, but this has put a huge dampener on my enthusiasm and I'm considering switching back because of it.

Running lspci -nnk | grep 0280 -A3 gives me the following.....

02:00.0 Network controller [0280]: Broadcom Limited BCM4331 802.11a/b/g/n [14e4:4331] (rev 02)
    Subsystem: Broadcom Limited BCM4331 802.11a/b/g/n [14e4:4331]
    Kernel driver in use: bcma-pci-bridge
    Kernel modules: bcma

iwconfig gives me.....

wlp2s0b1  IEEE 802.11  ESSID:"BTHub5-9W95"
Mode:Managed Frequency:2.437 GHz Access Point: 90:72:82:83:5E:2F
Bit Rate=24 Mb/s Tx-Power=20 dBm
Retry short limit:7 RTS thr:off Fragment thr:off Power Management:off Link Quality=58/70 Signal level=-52 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:2319 Invalid misc:5084 Missed beacon:0

enp1s0f0 no wireless extensions.

lo no wireless extensions.

I do have another problem setting up a dual boot with windows, but I'll leave that to see if I can get a solution to these issues first.

Thank you all in advance....

  • Let's start by identifying your wireless device and see if it has the correct driver. We will use the terminal because we can gather the information quickly and accurately. Please open a terminal Ctrl+Alt+t and run: lspci -nnk | grep 0280 -A3 Next, edit your question to add the result. Welcome to Ask Ubuntu. – chili555 Feb 27 '18 at 22:15
  • Wow! Quick reply - thank you! I've edited my question with the result of my terminal query. – Graeme Heddle Feb 27 '18 at 22:33
  • Please edit to add results for iwconfig – Jeremy31 Feb 27 '18 at 22:34
  • Any clues in the log? dmesg | grep -e b43 -e bcma As the result may be lengthy, paste the result here and give us the link: paste.ubuntu.com – chili555 Feb 27 '18 at 22:36
  • paste.ubuntu.com/p/jbMRFjVgBZ – Graeme Heddle Feb 27 '18 at 22:39

Try to check the router's settings first. Here is the detailed instruction 192.168.l.l with its help I can solve issues with Internet connection and Wi-Fi in a few clicks. Hope it works out in your case too.

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