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I have updated the Ubuntu version to 16.04. Also I've tried a bunch of different solutions as those answering these questions for example:

lenovo e540 RTL8723be wifi not working

Wifi problems with rtl8723be in Ubuntu 14.04

Wifi not working on Realtek rtl8723be wifi adapter

And none of them has worked. Please, if someone can help I'll appreciate it a lot.

The network command sudo lshw -C network :

*-network               
   description: Ethernet interface
   product: RTL8101/2/6E PCI Express Fast/Gigabit Ethernet controller
   vendor: Realtek Semiconductor Co., Ltd.
   physical id: 0
   bus info: pci@0000:08:00.0
   logical name: enp8s0
   version: 07
   serial: 3c:a8:2a:7b:fb:8c
   size: 100Mbit/s
   capacity: 100Mbit/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 autonegotiation
   configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=full firmware=rtl8106e-1_0.0.1 06/29/12 ip=192.168.1.47 latency=0 link=yes multicast=yes port=MII speed=100Mbit/s
   resources: irq:41 ioport:4000(size=256) memory:b2600000-b2600fff memory:b2400000-b2403fff
*-network UNCLAIMED
       description: Network controller
       product: RTL8723BE PCIe Wireless Network Adapter
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0
       bus info: pci@0000:09:00.0
       version: 00
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list
       configuration: latency=0
       resources: ioport:3000(size=256) memory:b2500000-b2503fff

The lspci | grep -i network command :

09:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8723BE PCIe Wireless Network Adapter
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Mark
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  • I would think the rtlwifi-new-dkms would work perfectly. What didn't work as expected? – chili555 Jul 22 '16 at 22:07
  • This is probably the Secure Boot issue. Disable Secure Boot in BIOS. – Pilot6 Jul 23 '16 at 03:02
  • @chili555 when I try the sudo modprobe -rv rtl8723be. Is says "Required key not available": mark@mark-HP-14-Notebook-PC:~$ sudo modprobe -v rtl8723be ant_sel=2 insmod /lib/modules/4.4.0-31-generic/kernel/drivers/net/wireless/realtek/rtlwifi/rtlwifi.ko modprobe: ERROR: could not insert 'rtl8723be': Required key not available – Mark Jul 23 '16 at 15:51
  • @Pilot6 is quite correct! Disable secure boot and it will likely be fixed. – chili555 Jul 23 '16 at 15:54
  • @pilot6 yes the Disable secure boot worked! Now I'll try the rtlwifi-new-dkms. – Mark Jul 23 '16 at 16:19
  • @Mark It is installed already. I mean rtlwifi-new-dkms. – Pilot6 Jul 23 '16 at 16:49
  • @Pilot6 thank you. Yes probably it was, but I did the process again. Now the problem is I don't see the networks. – Mark Jul 23 '16 at 16:52
  • You probably installed a driver form other source. Remove rtlwifi-new-dkms. – Pilot6 Jul 23 '16 at 16:54
  • @Pilot6 as the first part of the problem is solved, I have asked another question more specifically for the WiFi networks that are not appearing: Here. Thank you very much. – Mark Jul 23 '16 at 17:24

1 Answers1

-3

Try this in the terminal:

echo "options ath9k nohwcrypt=1" | sudo tee  /etc/modprobe.d/ath9k.conf

then type:

sudo modprobe -rfv ath9k

then:

sudo modprobe -v ath9k

I hope it helps!

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