[SOLVED] No wifi after upgrade to 18.04

[jpc2769]

Hello all,

Yesterday I upgraded to 18.04, since then I have had no wifi.

I am running a Thinkpad X230T, the hardware is an Intel 82579LM Gigabit Network Connection, it appears to be connected and up, and as far as I can tell the drivers are installed.

Initially, in the network manager widget, there was an icon for wifi, it was on, I could see the networks, but not connect. I opened network manager settings, there was no stored password for my home network. I tried to enter the password, when I clicked "OK" it disappeared, and I could not get it to "stick", nor connect to the network at all.

I did some google searching, and found this page, so I followed the directions there:

https://askubuntu.com/questions/1038...8-04-and-16-04

Now, the network manager widget does not show the wifi icon at all, nor any of the wireless networks.

I am at a loss, how do I even diagnose the problem?

[GreyGeek]

I was unable to make a network connection when I first installed Kubuntu 18.04. What worked for me was:
Right click on the wifi icon in the system tray. Choose "Network Settings" Uncheck the checkbox "Ask for PIN on modem detection".

[jpc2769]

Thanks, I did that, but it's still like I have no wifi at all. I have attached a picture of the network manager widget, there used to be a wifi icon next to the airplane, now it is gone; and no wifi connections show up, although I can see (but not connect to) all the old ones if I open network manager settings…

[GreyGeek]

What does "rfkill" show for your system? Mine shows this:

:~$ rfkill
ID TYPE      DEVICE              SOFT      HARD
 0 wlan      phy0           unblocked unblocked
 1 wlan      acer-wireless  unblocked unblocked
 2 bluetooth acer-bluetooth unblocked unblocked
 3 bluetooth hci0           unblocked unblocked

And, the output of "ifconfig"

EDIT: using nmcli you can turn your nm on or off in a Konsole
nmcli radio wifi on

Or, you can try the method given in this link
https://askubuntu.com/questions/1061...-inspiron-3542

to solve the problem i need to blacklist dell-rbtn (this is hardware issue) to balcklist dell-rbtn, i did
echo "blacklist dell-rbtn" | sudo tee /etc/modprobe.d/dell-rbtn.conf
and after this reboot the laptop and now i m able to use WIFI.

except that you will havve to change "dell-rbtn" to what ever you have.

[jpc2769]

:~$ rfkill
ID TYPE      DEVICE                 SOFT      HARD
0 bluetooth tpacpi_bluetooth_sw blocked unblocked

and

:~$ ifconfig
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
     inet 192.168.0.12  netmask 255.255.255.0  broadcast 192.168.0.255
     ether f0:de:f1:fd:7b:29  txqueuelen 1000  (Ethernet)
     RX packets 2324  bytes 2014725 (2.0 MB)
     RX errors 0  dropped 0  overruns 0  frame 0
     TX packets 1948  bytes 490103 (490.1 KB)
     TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
     device interrupt 20  memory 0xf2500000-f2520000  

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
     inet 127.0.0.1  netmask 255.0.0.0
     loop  txqueuelen 1000  (Local Loopback)
     RX packets 941  bytes 143665 (143.6 KB)
     RX errors 0  dropped 0  overruns 0  frame 0
     TX packets 941  bytes 143665 (143.6 KB)
     TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

tun0: flags=4305<UP,POINTOPOINT,RUNNING,NOARP,MULTICAST>  mtu 1500
     inet 10.22.10.6  netmask 255.255.255.255  destination 10.22.10.5
     unspec 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00  txqueuelen 100  (UNSPEC)
     RX packets 1634  bytes 1620367 (1.6 MB)
     RX errors 0  dropped 0  overruns 0  frame 0
     TX packets 1386  bytes 244518 (244.5 KB)
     TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

[claydoh]

Does it work if you turn off/disable the VPN (this is what tun0 is)
You look connected via a wired connection, what is it connected to?
Have you tried your laptop's function keys to try toggling the wifi on?

[jpc2769]

None of those things makes any difference; I am connected with a wired connection, it is the only thing that works at the moment. It is connected to my router.

[jpc2769]

Someone in another thread suggested I do this:

…

Do you have access at all to internet from this machine or any other? If so, see https://github.com/UbuntuForums/wireless-info right up to the end. If you post the information generated here or at ubuntuforums.org (in their networking & wireless subforum after reading the sticky there) someone may help you.

So here is the output:

########## wireless info START ##########

Report from: 28 Aug 2018 06:32 MDT -0600

Booted last: 28 Aug 2018 00:00 MDT -0600

Script from: 10 Jan 2018 20:04 UTC +0000

##### release ###########################

Distributor ID:	Ubuntu
Description:	Ubuntu 18.04.1 LTS
Release:	18.04
Codename:	bionic

##### kernel ############################

Linux 4.15.0-33-generic #36-Ubuntu SMP Wed Aug 15 16:00:05 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

Parameters: ro, quiet, splash, vt.handoff=1

##### desktop ###########################

Plasma

##### lspci #############################

libkmod: ERROR ../libkmod/libkmod-config.c:656 kmod_config_parse: /etc/modprobe.d/iwlwifi.conf line 9: ignoring bad line starting with '“options'

00:19.0 Ethernet controller [0200]: Intel Corporation 82579LM Gigabit Network Connection [8086:1502] (rev 04)
	Subsystem: Lenovo 82579LM Gigabit Network Connection (Lewisville) [17aa:21f3]
	Kernel driver in use: e1000e

03:00.0 Network controller [0280]: Intel Corporation Centrino Advanced-N 6205 [Taylor Peak] [8086:0085] (rev 34)
	Subsystem: Intel Corporation Centrino Advanced-N 6205 AGN [8086:1311]

##### lsusb #############################

Bus 002 Device 003: ID 056a:0090 Wacom Co., Ltd TPC90
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 003: ID 04f2:b2ea Chicony Electronics Co., Ltd Integrated Camera [ThinkPad]
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

##### PCMCIA card info ##################

##### rfkill ############################

0: tpacpi_bluetooth_sw: Bluetooth
	Soft blocked: yes
	Hard blocked: no

##### lsmod #############################

wmi_bmof               16384  0
wmi                    24576  1 wmi_bmof

##### interfaces ########################

[/etc/network/interfaces]
auto lo
iface lo inet loopback

##### ifconfig ##########################

eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
       inet 192.168.0.12  netmask 255.255.255.0  broadcast 192.168.0.255
       ether <MAC address>  txqueuelen 1000  (Ethernet)
       RX packets 1286797  bytes 1869845889 (1.8 GB)
       RX errors 0  dropped 0  overruns 0  frame 0
       TX packets 580826  bytes 89510393 (89.5 MB)
       TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
       device interrupt 20  memory 0xf2500000-f2520000  

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
       inet 127.0.0.1  netmask 255.0.0.0
       inet6 ::1  prefixlen 128  scopeid 0x10<host>
       loop  txqueuelen 1000  (Local Loopback)
       RX packets 13351  bytes 1286642 (1.2 MB)
       RX errors 0  dropped 0  overruns 0  frame 0
       TX packets 13351  bytes 1286642 (1.2 MB)
       TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

##### iwconfig ##########################

eth0      no wireless extensions.

lo        no wireless extensions.

##### route #############################

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         192.168.0.1     0.0.0.0         UG    0      0        0 eth0
169.254.0.0     0.0.0.0         255.255.0.0     U     1000   0        0 eth0
192.168.0.0     0.0.0.0         255.255.255.0   U     0      0        0 eth0

##### resolv.conf #######################

nameserver 127.0.0.53
search hsd1.co.comcast.net

##### network managers ##################

Installed:

	NetworkManager
	Wicd

Running:

root      1118     1  0 Aug27 ? 00:00:02 /usr/sbin/NetworkManager --no-daemon

##### NetworkManager info ###############

GENERAL.DEVICE:                         eth0
GENERAL.TYPE:                           ethernet
GENERAL.NM-TYPE:                        NMDeviceEthernet
GENERAL.VENDOR:                         Intel Corporation
GENERAL.PRODUCT:                        82579LM Gigabit Network Connection (Lewisville)
GENERAL.DRIVER:                         e1000e
GENERAL.DRIVER-VERSION:                 3.2.6-k
GENERAL.FIRMWARE-VERSION:               0.13-3
GENERAL.HWADDR:                         <MAC address>
GENERAL.MTU:                            1500
GENERAL.STATE:                          100 (connected)
GENERAL.REASON:                         0 (No reason given)
GENERAL.UDI:                            /sys/devices/pci0000:00/0000:00:19.0/net/eth0
GENERAL.IP-IFACE:                       eth0
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:                     eth0
GENERAL.CON-UUID:                       1a869ed8-1fba-4e4e-91f3-5936746117d1
GENERAL.CON-PATH:                       /org/freedesktop/NetworkManager/ActiveConnection/5
GENERAL.METERED:                        no (guessed)
CAPABILITIES.CARRIER-DETECT:            yes
CAPABILITIES.SPEED:                     1000 Mb/s
CAPABILITIES.IS-SOFTWARE:               no
CAPABILITIES.SRIOV:                     no
WIRED-PROPERTIES.CARRIER:               on
IP4.ADDRESS[1]:                         192.168.0.12/24
IP4.GATEWAY:                            192.168.0.1
IP4.ROUTE[1]:                           dst = 192.168.0.0/24, nh = 0.0.0.0, mt = 0
IP4.ROUTE[2]:                           dst = 0.0.0.0/0, nh = 192.168.0.1, mt = 0
IP4.ROUTE[3]:                           dst = 169.254.0.0/16, nh = 0.0.0.0, mt = 1000
IP6.GATEWAY:                            --
IP6.ROUTE[1]:                           dst = ff00::/8, nh = ::, mt = 256, table=255
CONNECTIONS.AVAILABLE-CONNECTION-PATHS: /org/freedesktop/NetworkManager/Settings/{51,81}
CONNECTIONS.AVAILABLE-CONNECTIONS[1]:   b94096b7-d11f-4137-89eb-7930e99a018f | Prof Office Wired Connection
CONNECTIONS.AVAILABLE-CONNECTIONS[2]:   1a869ed8-1fba-4e4e-91f3-5936746117d1 | eth0

##### NetworkManager.state ##############

[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true

##### NetworkManager.conf ###############

[main]
plugins=ifupdown,keyfile

[ifupdown]
managed=false

[device]
wifi.scan-rand-mac-address=no

##### NetworkManager profiles ###########

***Truncated***

##### Netplan config ####################

##### iw reg get ########################

Region: America/Denver (based on set time zone)

global
country 00: DFS-UNSET
	(2402 - 2472 @ 40), (6, 20), (N/A)
	(2457 - 2482 @ 20), (6, 20), (N/A), AUTO-BW, PASSIVE-SCAN
	(2474 - 2494 @ 20), (6, 20), (N/A), NO-OFDM, PASSIVE-SCAN
	(5170 - 5250 @ 80), (6, 20), (N/A), AUTO-BW, PASSIVE-SCAN
	(5250 - 5330 @ 80), (6, 20), (0 ms), DFS, AUTO-BW, PASSIVE-SCAN
	(5490 - 5730 @ 160), (6, 20), (0 ms), DFS, PASSIVE-SCAN
	(5735 - 5835 @ 80), (6, 20), (N/A), PASSIVE-SCAN
	(57240 - 63720 @ 2160), (N/A, 0), (N/A)

##### iwlist channels ###################

eth0      no frequency information.

lo        no frequency information.

##### iwlist scan #######################

eth0      Interface doesn't support scanning.

lo        Interface doesn't support scanning.

##### module infos ######################

##### module parameters #################

##### /etc/modules ######################

loop
lp

##### modprobe options ##################

[/etc/modprobe.d/amd64-microcode-blacklist.conf]
blacklist microcode

[/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 i2c_i801
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/intel-microcode-blacklist.conf]
blacklist microcode

[/etc/modprobe.d/iwlwifi.conf]
remove iwlwifi \
(/sbin/lsmod | grep -o -e ^iwlmvm -e ^iwldvm -e ^iwlwifi | xargs /sbin/rmmod) \
&& /sbin/modprobe -r mac80211
options iwlwifi 11n_disable=8 bt_coex_active=N
“options iwlwifi disable_msix=1”

##### rc.local ##########################

grep: /etc/rc.local: No such file or directory

##### pm-utils ##########################

[/etc/pm/power.d/disable_wol] (777 root)
CONFFILE=/etc/default/tlp
LIBDIR='/usr/lib/pm-utils'
if [ -d "$LIBDIR/power.d" ]; then
   # pm-utils script dir exists
   blocked="$LIBDIR/power.d/${0##*/}"
   if [ -x "$blocked" ]; then
       # overridable pm-utils script exists --> check if TLP enabled
       if [ -e "$CONFFILE" ] && . "$CONFFILE" && [ "$TLP_ENABLE" = '1' ]; then
           # TLP is enabled --> disable $blocked
           echo "Notice: '${blocked}' disabled by TLP."
       else
           exec "$blocked" $*
       fi
   fi # else: nothing to disable -> don't read $CONFFILE
fi
exit 0

[/etc/pm/power.d/laptop-mode] (777 root)
CONFFILE=/etc/default/tlp
LIBDIR='/usr/lib/pm-utils'
if [ -d "$LIBDIR/power.d" ]; then
   # pm-utils script dir exists
   blocked="$LIBDIR/power.d/${0##*/}"
   if [ -x "$blocked" ]; then
       # overridable pm-utils script exists --> check if TLP enabled
       if [ -e "$CONFFILE" ] && . "$CONFFILE" && [ "$TLP_ENABLE" = '1' ]; then
           # TLP is enabled --> disable $blocked
           echo "Notice: '${blocked}' disabled by TLP."
       else
           exec "$blocked" $*
       fi
   fi # else: nothing to disable -> don't read $CONFFILE
fi
exit 0

[/etc/pm/power.d/pci_devices] (777 root)
CONFFILE=/etc/default/tlp
LIBDIR='/usr/lib/pm-utils'
if [ -d "$LIBDIR/power.d" ]; then
   # pm-utils script dir exists
   blocked="$LIBDIR/power.d/${0##*/}"
   if [ -x "$blocked" ]; then
       # overridable pm-utils script exists --> check if TLP enabled
       if [ -e "$CONFFILE" ] && . "$CONFFILE" && [ "$TLP_ENABLE" = '1' ]; then
           # TLP is enabled --> disable $blocked
           echo "Notice: '${blocked}' disabled by TLP."
       else
           exec "$blocked" $*
       fi
   fi # else: nothing to disable -> don't read $CONFFILE
fi
exit 0

[/etc/pm/power.d/pcie_aspm] (777 root)
CONFFILE=/etc/default/tlp
LIBDIR='/usr/lib/pm-utils'
if [ -d "$LIBDIR/power.d" ]; then
   # pm-utils script dir exists
   blocked="$LIBDIR/power.d/${0##*/}"
   if [ -x "$blocked" ]; then
       # overridable pm-utils script exists --> check if TLP enabled
       if [ -e "$CONFFILE" ] && . "$CONFFILE" && [ "$TLP_ENABLE" = '1' ]; then
           # TLP is enabled --> disable $blocked
           echo "Notice: '${blocked}' disabled by TLP."
       else
           exec "$blocked" $*
       fi
   fi # else: nothing to disable -> don't read $CONFFILE
fi
exit 0

[/etc/pm/power.d/sched-powersave] (777 root)
CONFFILE=/etc/default/tlp
LIBDIR='/usr/lib/pm-utils'
if [ -d "$LIBDIR/power.d" ]; then
   # pm-utils script dir exists
   blocked="$LIBDIR/power.d/${0##*/}"
   if [ -x "$blocked" ]; then
       # overridable pm-utils script exists --> check if TLP enabled
       if [ -e "$CONFFILE" ] && . "$CONFFILE" && [ "$TLP_ENABLE" = '1' ]; then
           # TLP is enabled --> disable $blocked
           echo "Notice: '${blocked}' disabled by TLP."
       else
           exec "$blocked" $*
       fi
   fi # else: nothing to disable -> don't read $CONFFILE
fi
exit 0

[/etc/pm/power.d/usb_bluetooth] (777 root)
CONFFILE=/etc/default/tlp
LIBDIR='/usr/lib/pm-utils'
if [ -d "$LIBDIR/power.d" ]; then
   # pm-utils script dir exists
   blocked="$LIBDIR/power.d/${0##*/}"
   if [ -x "$blocked" ]; then
       # overridable pm-utils script exists --> check if TLP enabled
       if [ -e "$CONFFILE" ] && . "$CONFFILE" && [ "$TLP_ENABLE" = '1' ]; then
           # TLP is enabled --> disable $blocked
           echo "Notice: '${blocked}' disabled by TLP."
       else
           exec "$blocked" $*
       fi
   fi # else: nothing to disable -> don't read $CONFFILE
fi
exit 0

[/etc/pm/power.d/wireless] (777 root)
CONFFILE=/etc/default/tlp
LIBDIR='/usr/lib/pm-utils'
if [ -d "$LIBDIR/power.d" ]; then
   # pm-utils script dir exists
   blocked="$LIBDIR/power.d/${0##*/}"
   if [ -x "$blocked" ]; then
       # overridable pm-utils script exists --> check if TLP enabled
       if [ -e "$CONFFILE" ] && . "$CONFFILE" && [ "$TLP_ENABLE" = '1' ]; then
           # TLP is enabled --> disable $blocked
           echo "Notice: '${blocked}' disabled by TLP."
       else
           exec "$blocked" $*
       fi
   fi # else: nothing to disable -> don't read $CONFFILE
fi
exit 0

[/etc/pm/power.d/xfs_buffer] (777 root)
CONFFILE=/etc/default/tlp
LIBDIR='/usr/lib/pm-utils'
if [ -d "$LIBDIR/power.d" ]; then
   # pm-utils script dir exists
   blocked="$LIBDIR/power.d/${0##*/}"
   if [ -x "$blocked" ]; then
       # overridable pm-utils script exists --> check if TLP enabled
       if [ -e "$CONFFILE" ] && . "$CONFFILE" && [ "$TLP_ENABLE" = '1' ]; then
           # TLP is enabled --> disable $blocked
           echo "Notice: '${blocked}' disabled by TLP."
       else
           exec "$blocked" $*
       fi
   fi # else: nothing to disable -> don't read $CONFFILE
fi
exit 0

##### udev rules ########################

[/etc/udev/rules.d/70-persistent-net.rules]
# PCI device 0x8086:/sys/devices/pci0000:00/0000:00:19.0 (e1000e)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="<MAC address>", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
# PCI device 0x8086:/sys/devices/pci0000:00/0000:00:1c.1/0000:03:00.0 (iwlwifi)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="<MAC address>", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="wlan*", NAME="wlan0"

##### dmesg #############################

[ 3229.977407] e1000e: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: Rx/Tx
[ 3231.478715] e1000e: eth0 NIC Link is Down
[ 3231.699278] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 3235.184702] e1000e: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: Rx/Tx
[ 3235.184757] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 3238.282039] e1000e: eth0 NIC Link is Down
[ 3238.507146] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 3238.649837] e1000e: eth0 NIC Link is Down
[ 3239.131070] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 3241.963887] e1000e: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: Rx/Tx
[ 3241.963933] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 3256.791465] e1000e: eth0 NIC Link is Down
[ 3257.012516] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 3261.038718] e1000e: eth0 NIC Link is Down
[ 3261.039242] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready (repeated 2 times)
[ 3263.013995] e1000e: eth0 NIC Link is Down
[ 3263.234721] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 3280.357795] e1000e: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: Rx/Tx
[ 3280.357839] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 3711.492893] iwlwifi-stack-public:master:7156:f6032645

########## wireless info END ############

I have no idea what I am looking at here…

[Snowhog]

Be patient at this point. Don't do anything. There are members here who are very familiar with NetworkManager and Wicd issues. From the output of the listing your provided, the following sticks out prominently to me:

[COLOR=#333333]##### network managers ##################[/COLOR]
Installed:

    NetworkManager
    Wicd

You aren't supposed to have more than one network manager installed at the same time, and NetworkManager and Wicd conflict with each other IIRC.

[jpc2769]

OK thanks, I'll do my best ;-)

[GreyGeek]

Snowhog is right. NetworkManager and wicd interfere with each other. Use “sudo apt purge wife” to remove it and repost the tests afterwards

[Snowhog]

purge wife? You want to purge your wife? Should that be wicd instead?

[jpc2769]

Use “sudo apt purge wife” to remove it

Seems a bit harsh, have you tried couples' counseling first? ;-)

Should it be "sudo apt purge wifi"?

[GreyGeek]

Typo! sudo apt purge wicd

Having NetworkManager and wicd on the same installation blocks both from working. NetworkManager works fine.

Looking at the wifi into output, your wifi, the N-6205, uses the iwlwifi driver. Intel says that support for your device was discontinued on Nov 30, 2017.
https://www.intel.com/content/www/us...dual-band.html

The latest firmware is at
https://www.intel.com/content/www/us...etworking.html
which leads to the wiki.kernel.org site
https://wireless.wiki.kernel.org/_me...18.168.6.1.tgz
which is for the 2.6.35 and higher kernel.

I am running 18.04 and checking for the 6000g2 firmware I see
file:///lib/firmware/iwlwifi-6000g2a-5.ucode
file:///lib/firmware/iwlwifi-6000g2a-6.ucode
file:///lib/firmware/iwlwifi-6000g2b-6.ucode

I downloaded it and looked at its contents using Ark.


As you can see, the date for those files is June 6, 2012 and contains
iwlwifi-6000g2a-6.ucode
which is the second in the 18.04 listing.

If labels mean anything the 3rd listing is the most recent, but I don't know who created it, since it isn't listed on the kernel support site.
So, I suspect that if you rename the other two (past "XXX" in front of their names) and reboot you *might* get your wifi back. At least try them one at a time. (IF ANYONE running 16.04 and using this device will show their output of lsmod it would be helpful).

[jpc2769]

OK I will purge wicd and see what happens.

I have downloaded that archive, what do I do with it?