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I just installed Linux mint in this machine and wireless connection is not working out of the box. You can find more information below:

########## wireless info START ########## Report from: 30 Apr 2019 14:50 AEST +1000 Booted last: 30 Apr 2019 00:00 AEST +1000 Script from: 22 Oct 2018 03:34 UTC +0000 ##### release ########################### Distributor ID: LinuxMint Description: Linux Mint 19.1 Tessa Release: 19.1 Codename: tessa ##### kernel ############################ Linux 4.15.0-20-generic #21-Ubuntu SMP Tue Apr 24 06:16:15 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux Parameters: ro, quiet, splash, vt.handoff=1 ##### desktop ########################### Cinnamon ##### lspci ############################# 03:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 10) Subsystem: Lenovo RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [17aa:5068] Kernel driver in use: r8169 05:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. Device [10ec:b822] Subsystem: Lenovo Device [17aa:b023] Kernel modules: r8822be ##### lsusb ############################# Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 004: ID 06cb:00a2 Synaptics, Inc. Bus 001 Device 003: ID 5986:2113 Acer, Inc Bus 001 Device 005: ID 0bda:b023 Realtek Semiconductor Corp. Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub ##### PCMCIA card info ################## ##### rfkill ############################ 0: tpacpi_bluetooth_sw: Bluetooth Soft blocked: no Hard blocked: no 1: hci0: Bluetooth Soft blocked: no Hard blocked: no ##### secure boot ####################### SecureBoot enabled ##### lsmod ############################# mac80211 778240 0 cfg80211 622592 1 mac80211 intel_wmi_thunderbolt 16384 0 wmi_bmof 16384 0 wmi 24576 2 wmi_bmof,intel_wmi_thunderbolt ##### interfaces ######################## [/etc/network/interfaces] auto lo iface lo inet loopback ##### ifconfig ########################## 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback <MAC address> brd <MAC address> inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: enp3s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000 link/ether <MAC 'enp3s0' [IF1]> brd <MAC address> inet 192.168.1.108/24 brd 192.168.1.255 scope global dynamic noprefixroute enp3s0 valid_lft 604321sec preferred_lft 604321sec inet6 fe80::ca0c:476f:b4a9:ae4d/64 scope link noprefixroute valid_lft forever preferred_lft forever ##### iwconfig ########################## enp3s0 no wireless extensions. lo no wireless extensions. ##### route ############################# default via 192.168.1.1 dev enp3s0 proto dhcp metric 100 169.254.0.0/16 dev enp3s0 scope link metric 1000 192.168.1.0/24 dev enp3s0 proto kernel scope link src 192.168.1.108 metric 100 ##### resolv.conf ####################### [777 root '/etc/resolv.conf' -> '../run/systemd/resolve/stub-resolv.conf'] nameserver 127.0.0.53 ##### network managers ################## Installed: NetworkManager Running: root 822 1 0 14:32 ? 00:00:00 /usr/sbin/NetworkManager --no-daemon ##### NetworkManager info ############### GENERAL.DEVICE: enp3s0 GENERAL.TYPE: ethernet GENERAL.NM-TYPE: NMDeviceEthernet GENERAL.VENDOR: Realtek Semiconductor Co., Ltd. GENERAL.PRODUCT: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller GENERAL.DRIVER: r8169 GENERAL.DRIVER-VERSION: 2.3LK-NAPI GENERAL.FIRMWARE-VERSION: -- GENERAL.HWADDR: <MAC 'enp3s0' [IF1]> GENERAL.MTU: 1500 GENERAL.STATE: 100 (connected) GENERAL.REASON: 0 (No reason given) GENERAL.UDI: /sys/devices/pci0000:00/0000:00:1c.4/0000:03:00.0/net/enp3s0 GENERAL.IP-IFACE: enp3s0 GENERAL.IS-SOFTWARE: no GENERAL.NM-MANAGED: yes GENERAL.AUTOCONNECT: yes GENERAL.FIRMWARE-MISSING: no GENERAL.NM-PLUGIN-MISSING: no GENERAL.PHYS-PORT-ID: -- GENERAL.CONNECTION: Wired connection 1 GENERAL.CON-UUID: 69731fb2-585a-3d28-a544-fafa54a3f532 GENERAL.CON-PATH: /org/freedesktop/NetworkManager/ActiveConnection/2 GENERAL.METERED: no (guessed) CAPABILITIES.CARRIER-DETECT: yes CAPABILITIES.SPEED: 100 Mb/s CAPABILITIES.IS-SOFTWARE: no CAPABILITIES.SRIOV: no WIRED-PROPERTIES.CARRIER: on IP4.ADDRESS[1]: 192.168.1.108/24 IP4.GATEWAY: 192.168.1.1 IP4.ROUTE[1]: dst = 0.0.0.0/0, nh = 192.168.1.1, mt = 100 IP4.ROUTE[2]: dst = 192.168.1.0/24, nh = 0.0.0.0, mt = 100 IP4.ROUTE[3]: dst = 169.254.0.0/16, nh = 0.0.0.0, mt = 1000 IP4.DNS[1]: 1.1.1.1 IP4.DNS[2]: 1.0.0.1 IP4.WINS[1]: 192.168.1.1 DHCP4.OPTION[1]: requested_routers = 1 DHCP4.OPTION[2]: requested_domain_search = 1 DHCP4.OPTION[3]: requested_host_name = 1 DHCP4.OPTION[4]: requested_broadcast_address = 1 DHCP4.OPTION[5]: requested_time_offset = 1 DHCP4.OPTION[6]: requested_domain_name = 1 DHCP4.OPTION[7]: requested_rfc3442_classless_static_routes = 1 DHCP4.OPTION[8]: requested_wpad = 1 DHCP4.OPTION[9]: requested_netbios_scope = 1 DHCP4.OPTION[10]: next_server = 0.0.0.0 DHCP4.OPTION[11]: broadcast_address = 192.168.1.255 DHCP4.OPTION[12]: requested_interface_mtu = 1 DHCP4.OPTION[13]: dhcp_message_type = 5 DHCP4.OPTION[14]: requested_subnet_mask = 1 DHCP4.OPTION[15]: ip_address = 192.168.1.108 DHCP4.OPTION[16]: routers = 192.168.1.1 DHCP4.OPTION[17]: requested_domain_name_servers = 1 DHCP4.OPTION[18]: subnet_mask = 255.255.255.0 DHCP4.OPTION[19]: requested_static_routes = 1 DHCP4.OPTION[20]: requested_ntp_servers = 1 DHCP4.OPTION[21]: domain_name_servers = 1.1.1.1 1.0.0.1 DHCP4.OPTION[22]: netbios_name_servers = 192.168.1.1 DHCP4.OPTION[23]: requested_ms_classless_static_routes = 1 DHCP4.OPTION[24]: requested_netbios_name_servers = 1 DHCP4.OPTION[25]: dhcp_lease_time = 604800 DHCP4.OPTION[26]: network_number = 192.168.1.0 DHCP4.OPTION[27]: expiry = 1557204171 DHCP4.OPTION[28]: dhcp_server_identifier = 192.168.1.1 IP6.ADDRESS[1]: fe80::ca0c:476f:b4a9:ae4d/64 IP6.GATEWAY: -- IP6.ROUTE[1]: dst = ff00::/8, nh = ::, mt = 256, table=255 IP6.ROUTE[2]: dst = fe80::/64, nh = ::, mt = 256 IP6.ROUTE[3]: dst = fe80::/64, nh = ::, mt = 100 CONNECTIONS.AVAILABLE-CONNECTION-PATHS: /org/freedesktop/NetworkManager/Settings/{2} CONNECTIONS.AVAILABLE-CONNECTIONS[1]: 69731fb2-585a-3d28-a544-fafa54a3f532 | Wired connection 1 ##### NetworkManager.state ############## [main] NetworkingEnabled=true WirelessEnabled=true WWANEnabled=true ##### NetworkManager config ############# [[/etc/NetworkManager/conf.d/default-wifi-powersave-on.conf]] [connection] wifi.powersave = 3 [[/etc/NetworkManager/NetworkManager.conf]] [main] plugins=ifupdown,keyfile [ifupdown] managed=false [device] wifi.scan-rand-mac-address=no [[/usr/lib/NetworkManager/conf.d/10-dns-resolved.conf]] [main] dns=systemd-resolved [[/usr/lib/NetworkManager/conf.d/10-globally-managed-devices.conf]] [keyfile] unmanaged-devices=*,except:type:wifi,except:type:wwan [[/usr/lib/NetworkManager/conf.d/20-connectivity-ubuntu.conf]] [connectivity] uri=http://connectivity-check.ubuntu.com/ [[/usr/lib/NetworkManager/conf.d/no-mac-addr-change.conf]] [device-mac-addr-change-wifi] match-device=driver:rtl8723bs,driver:rtl8189es,driver:r8188eu,driver:8188eu,driver:eagle_sdio,driver:wl wifi.scan-rand-mac-address=no wifi.cloned-mac-address=preserve ethernet.cloned-mac-address=preserve ##### NetworkManager profiles ########### [[/etc/NetworkManager/system-connections/Wi-Fi connection 1]] (600 root) [connection] id=Wi-Fi connection 1 | type=wifi | permissions= [wifi] mac-address-blacklist= | ssid=Home [ipv4] method=auto [ipv6] method=auto ##### Netplan config #################### [/etc/netplan/1-network-manager-all.yaml] network: version: 2 renderer: NetworkManager ##### iw reg get ######################## Region: Australia/Brisbane (based on set time zone) global country 00: DFS-UNSET (2402 - 2472 @ 40), (N/A, 20), (N/A) (2457 - 2482 @ 20), (N/A, 20), (N/A), AUTO-BW, PASSIVE-SCAN (2474 - 2494 @ 20), (N/A, 20), (N/A), NO-OFDM, PASSIVE-SCAN (5170 - 5250 @ 80), (N/A, 20), (N/A), AUTO-BW, PASSIVE-SCAN (5250 - 5330 @ 80), (N/A, 20), (0 ms), DFS, AUTO-BW, PASSIVE-SCAN (5490 - 5730 @ 160), (N/A, 20), (0 ms), DFS, PASSIVE-SCAN (5735 - 5835 @ 80), (N/A, 20), (N/A), PASSIVE-SCAN (57240 - 63720 @ 2160), (N/A, 0), (N/A) ##### iwlist channels ################### enp3s0 no frequency information. lo no frequency information. ##### iwlist scan ####################### enp3s0 Interface doesn't support scanning. lo Interface doesn't support scanning. ##### module infos ###################### [mac80211] filename: /lib/modules/4.15.0-20-generic/kernel/net/mac80211/mac80211.ko license: GPL description: IEEE 802.11 subsystem srcversion: 1CEA5CF286EDB289C1D0BF8 depends: cfg80211 retpoline: Y intree: Y name: mac80211 vermagic: 4.15.0-20-generic SMP mod_unload signat: PKCS#7 signer: sig_key: sig_hashalgo: md4 parm: minstrel_vht_only:Use only VHT rates when VHT is supported by sta. (bool) parm: max_nullfunc_tries:Maximum nullfunc tx tries before disconnecting (reason 4). (int) parm: max_probe_tries:Maximum probe tries before disconnecting (reason 4). (int) parm: beacon_loss_count:Number of beacon intervals before we decide beacon was lost. (int) parm: probe_wait_ms:Maximum time(ms) to wait for probe response before disconnecting (reason 4). (int) parm: ieee80211_default_rc_algo:Default rate control algorithm for mac80211 to use (charp) [cfg80211] filename: /lib/modules/4.15.0-20-generic/kernel/net/wireless/cfg80211.ko description: wireless configuration support license: GPL author: Johannes Berg srcversion: D5B0789D4C423C81CCFB437 depends: retpoline: Y intree: Y name: cfg80211 vermagic: 4.15.0-20-generic SMP mod_unload signat: PKCS#7 signer: sig_key: sig_hashalgo: md4 parm: bss_entries_limit:limit to number of scan BSS entries (per wiphy, default 1000) (int) parm: ieee80211_regdom:IEEE 802.11 regulatory domain code (charp) parm: cfg80211_disable_40mhz_24ghz:Disable 40MHz support in the 2.4GHz band (bool) ##### module parameters ################# [mac80211] beacon_loss_count: 7 ieee80211_default_rc_algo: minstrel_ht max_nullfunc_tries: 2 max_probe_tries: 5 minstrel_vht_only: Y probe_wait_ms: 500 [cfg80211] bss_entries_limit: 1000 cfg80211_disable_40mhz_24ghz: N ieee80211_regdom: 00 ##### /etc/modules ###################### ##### modprobe options ################## [/etc/modprobe.d/blacklist-ath_pci.conf] blacklist ath_pci [/etc/modprobe.d/blacklist.conf] blacklist evbug blacklist usbmouse blacklist usbkbd blacklist eepro100 blacklist de4x5 blacklist eth1394 blacklist snd_intel8x0m blacklist snd_aw2 blacklist prism54 blacklist bcm43xx blacklist garmin_gps blacklist asus_acpi blacklist snd_pcsp blacklist pcspkr blacklist amd76x_edac [/etc/modprobe.d/blacklist-rare-network.conf] alias net-pf-3 off alias net-pf-6 off alias net-pf-9 off alias net-pf-11 off alias net-pf-12 off alias net-pf-19 off alias net-pf-21 off alias net-pf-36 off [/etc/modprobe.d/iwlwifi.conf] remove iwlwifi \ (/sbin/lsmod | grep -o -e ^iwlmvm -e ^iwldvm -e ^iwlwifi | xargs /sbin/rmmod) \ && /sbin/modprobe -r mac80211 ##### rc.local ########################## grep: /etc/rc.local: No such file or directory ##### pm-utils ########################## ##### udev rules ######################## ##### dmesg ############################# ########## wireless info END ############

Edit1: It looks like the problem is the missing wireless driver (Realtek RTL8822BE). Also I found this repository that may have the necessary files but I still don't know that to do with them.

Edit 2 : I tried to follow these steps bellow found in stackoverflow.

sudo apt install build-essential git git clone https://github.com/rtlwifi-linux/rtlwifi-next cd rtlwifi-next make sudo make install sudo modprobe rtl8822be

But I got this error:

CC [M] /home/MYUSER/Downloads/rtlwifi-next/base.o /home/MYUSER/Downloads/rtlwifi-next/base.c: In function ‘_rtl_init_deferred_work’: /home/MYUSER/Downloads/rtlwifi-next/base.c:460:2: error: implicit declaration of function ‘setup_timer’; did you mean ‘sk_stop_timer’? [-Werror=implicit-function-declaration]
setup_timer(&rtlpriv->works.watchdog_timer, ^~~~~~~~~~~
sk_stop_timer

EDIT 3: After I posted my answer I enabled my Secure Boot and my wifi stopped working. Thus, my wifi is only working when my Secure Boot is disabled.

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  • 1
    It looks like enp3s0 is a wired connection, I cannot see any device in your post that looks like a wireless device. What hardware is your wireless device? Have you checked if your wireless hardware requires drivers or software not included in a default install? Commented Apr 30, 2019 at 19:55
  • I found out the problem. This Realtek RTL8822BE driver is missing. Commented May 2, 2019 at 9:16
  • I tried. but when I run sudo make, I got this latest error that I just wrote. Maybe is because of my kernel version? I tried to updated but didn't worked. Commented May 2, 2019 at 11:17
  • 1
    You also have an 4.15 kernel, see this comment. There is an extended branch in this repo which is said to be working. You can clone it with git clone -b extended https://github.com/lwfinger/rtlwifi_new.git, change directory with cd rtlwifi_new... Commented May 2, 2019 at 11:36

2 Answers 2

Reset to default
1

As an alternate answer you could sign the drivers with the MOK Key

The full write up is here

This way you can keep secure boot enabled!

Writing up the basis of it all from downloading the repo to finish would look like this:

(Note I signed more modules then I probably needed to. I'm not sure which ones govern what except rtl8822be was my driver so I signed all of them without rtl in front just in case.)

#Generate a new MOK key sudo update-secureboot-policy --new-key #Enroll key into firmware sudo update-secureboot-policy --enroll-key

Read the instructions from enroll key. Reboot your computer and follow them.

Next part is the same as before: 

sudo apt install build-essential git git clone -b extended https://github.com/lwfinger/rtlwifi_new.git cd rtlwifi_new make

Here comes the fun part:

sudo kmodsign sha512 \ /var/lib/shim-signed/mok/MOK.priv \ /var/lib/shim-signed/mok/MOK.der \ rtl_pci.ko sudo kmodsign sha512 \ /var/lib/shim-signed/mok/MOK.priv \ /var/lib/shim-signed/mok/MOK.der \ rtlwifi.ko sudo kmodsign sha512 \ /var/lib/shim-signed/mok/MOK.priv \ /var/lib/shim-signed/mok/MOK.der \ rtl8822be/rtl8822be.ko

After that we finish up the same way

sudo make install sudo modprobe rtl8822be

Then voila wifi is working.

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After a fresh install of Linux Mint my wifi was not working duo to a missing driver Realtek RTL8822BE.

To install I had to follow these steps:

sudo apt install build-essential git git clone -b extended https://github.com/lwfinger/rtlwifi_new.git cd rtlwifi_new make sudo make install sudo modprobe rtl8822be

Note that I am cloning the extended branch because of my version of kernel 4.15 as @Freddy pointed.

After sudo modprobe rtl8822be I got these following error:

modprobe: ERROR: could not insert 'rtl8822be': Required key not available

Then I needed to disable Secure Boot, you can achieve that in many ways as this links pointed. But what worked for me was this answer. You need to follow each step of this answers to get the correct results.

Finally I runned sudo mobprobe rtl882be and got this output on console:

modprobe: ERROR: could not insert 'rtl8822be': Exec format error

Then I realized that my wifi was already working.

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