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I have Ubuntu 18.04 Dual booting with Windows 10 on my HP-EliteBook-745-G2, and for some reason, I cannot seem to find WiFi networks through my WiFi adapter, but Ethernet works (however, Ethernet stops working properly if I shut my screen down, and go back into my laptop, forcing me to restart my laptop to use Ethernet).

What I have done that didn't work:

  • Uninstalled Kernels and reinstalled.

  • Tried using rtlwifi.new as a fix.

  • Tried connecting through a hidden network, with different networks in different places.

  • Reinstalled Ubuntu.

  • sudo service network-manager restart

So I thought I would create a new post to get a different perspective here.

Side note: WiFi works perfectly on the Windows side of things, these problems persist only on my Ubuntu boot.

The output of lshw -C network gives:

$ sudo lshw -C network
[sudo] password for nathan: 
  *-network                 
       description: Ethernet interface
       product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0
       bus info: pci@0000:01:00.0
       logical name: enp1s0f0
       version: 0e
       serial: 30:8d:99:bf:09:ab
       size: 1Gbit/s
       capacity: 1Gbit/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=full ip=10.0.0.167 latency=0 link=yes multicast=yes port=MII speed=1Gbit/s
       resources: irq:39 ioport:4000(size=256) memory:d5804000-d5804fff memory:d5800000-d5803fff
  *-network
       description: Wireless interface
       product: BCM4352 802.11ac Wireless Network Adapter
       vendor: Broadcom Limited
       physical id: 0
       bus info: pci@0000:02:00.0
       logical name: wlo1
       version: 03
       serial: 28:c2:dd:8f:85:ec
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=wl0 driverversion=6.30.223.271 (r587334) latency=0 multicast=yes wireless=IEEE 802.11
       resources: irq:38 memory:d0a00000-d0a07fff memory:d0800000-d09fffff

Edit: Just for the people using edits to correct my grammar, 'I'd' is the same as 'I would'.

Another edit: Ran rfkill list all and here's the results:

    $ rfkill list all
0: hci0: Bluetooth
    Soft blocked: no
    Hard blocked: no
1: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no
2: brcmwl-0: Wireless LAN
    Soft blocked: no
    Hard blocked: no

Then ran : dmesg | grep wl to produce:

$ dmesg | grep wl
[    0.000000] DMI: Hewlett-Packard HP EliteBook 745 G2/221C, BIOS M84 Ver. 01.07 03/10/2015
[    6.918774] wl: loading out-of-tree module taints kernel.
[    6.918782] wl: module license 'MIXED/Proprietary' taints kernel.
[    6.951608] wl: module verification failed: signature and/or required key missing - tainting kernel
[    7.123725] wlan0: Broadcom BCM43b1 802.11 Hybrid Wireless Controller 6.30.223.271 (r587334)
[    7.330784] wl 0000:02:00.0 wlo1: renamed from wlan0
[   10.672629] IPv6: ADDRCONF(NETDEV_UP): wlo1: link is not ready
[   10.791775] IPv6: ADDRCONF(NETDEV_UP): wlo1: link is not ready

Full diagnostics

 $ cat /etc/network/interfaces
# interfaces(5) file used by ifup(8) and ifdown(8)

Edit again

    :~$ sudo modprobe wl && dmesg | grep wl
[    0.000000] DMI: Hewlett-Packard HP EliteBook 745 G2/221C, BIOS M84 Ver. 01.07 03/10/2015
[    7.004949] wl: loading out-of-tree module taints kernel.
[    7.004958] wl: module license 'MIXED/Proprietary' taints kernel.
[    7.011342] wl: module verification failed: signature and/or required key missing - tainting kernel
[    7.888998] wlan0: Broadcom BCM43b1 802.11 Hybrid Wireless Controller 6.30.223.271 (r587334)
[    7.923740] wl 0000:02:00.0 wlo1: renamed from wlan0
[   11.818773] IPv6: ADDRCONF(NETDEV_UP): wlo1: link is not ready
[   11.937130] IPv6: ADDRCONF(NETDEV_UP): wlo1: link is not ready
[ 2546.180968] IPv6: ADDRCONF(NETDEV_UP): wlo1: link is not ready
[ 2546.291784] IPv6: ADDRCONF(NETDEV_UP): wlo1: link is not ready
Nathaniel Miller
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  • Please edit your question to add the result of the terminal command: rfkill list all Welcome to Ask Ubuntu. – chili555 Oct 12 '18 at 13:11
  • Are there any clues in the log? Please edit your question to add the result of: dmesg | grep wl and also, does this produce any output? sudo iwlist wlo1 scan I don't need to see the result; just tell me if it errors out or if it sees networks. – chili555 Oct 12 '18 at 13:38
  • @chili555 No clues in the log, Output added to post for 'dmesg | grep wl', and no, the other command doesn't see any networks. – Nathaniel Miller Oct 12 '18 at 13:51
  • @Kulfy However, he already has the correct driver bcmwl-kernel-source installed. – chili555 Oct 12 '18 at 14:06
  • My favorite kind of problem: everything is just perfect except it doesn't actually work! Let's look at the full diagnostic report from here: https://askubuntu.com/questions/425155/my-wireless-wifi-connection-does-not-work-what-information-is-needed-to-diagnos/425180#425180 Please give us the paste link. – chili555 Oct 12 '18 at 14:09
  • @chili555 I've added the full diagnostic into the question. Thanks – Nathaniel Miller Oct 12 '18 at 15:02
  • May we see: cat /etc/network/interfaces The diagnostics suggest that it is missing altogether! – chili555 Oct 12 '18 at 15:36
  • @chili555 output added in the post – Nathaniel Miller Oct 12 '18 at 15:51
  • Please see my partial answer below. – chili555 Oct 12 '18 at 16:09

2 Answers2

0

I had several times problems with Ubuntu 16.04 and restart of network manager always solved the issue.

So please try

sudo service network-manager restart
Mr.Michael.Schulze
  • 527
0

This will be a partial answer until we track down the exact issue. I will edit the answer to provide further steps as we progress.

First, the conf file for a Realtek driver isn't needed; please remove it:

sudo rm /etc/modprobe.d/rtl8723de.conf

Second, your /etc/network/interfaces file is faulty. Please amend it:

sudo nano /etc/network/interfaces

Amend the file to read:

# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback

Save (Ctrl+o followed by Enter) and exit (Ctrl+x) the text editor.

Reboot and tell us if there is any improvement.

EDIT: We notice this error in your paste:

ERROR @wl_dev_intvar_get :

A search reveals many complaints involving your exact 14e4:43b1 device and only one solution: https://forums.linuxmint.com/viewtopic.php?f=53&t=236084&start=20

I suggest that you try the same:

sudo apt purge bcmwl-kernel-source
sudo apt install broadcom-sta-dkms

Reboot and show us:

dmesg | grep wl
chili555
  • 60,188