I know there are similar questions. but their command output is different to mine and did not work for me. I have installed Ubuntu on my flash drive and i have used it for more than a year.
Cause of problem:
I was turning the wifi switch(ctrl + F2) on and off repeatedly when i accidentally disconnected the usb that the os is installed on. when restarting i can not connect to wifi; it says No Wifi Adapter Found. i tried USB tether but that is not detected. wifi and usb tether works when using the live usb that i installed Ubuntu from. I don't currently have access to broadband so i haven't tried the ethernet connection.
I am not able to connect to the internet so i am running all the commands below from the live usb chrooting to the real system.
1.
rfkill unblock all
sudo /etc/init.d/networking restart says networking command not found so i changed 'networking' to 'network-manager'
sudo rm /etc/udev/rules.d/70-persistent-net.rules throws no such file
sudo reboot
2.
sudo apt remove broadcom-sta-dkms bcmwl-kernel-source
sudo apt install firmware-b43-installer
3.
sudo apt-get update
sudo apt-get purge bcmwl-kernel-source
sudo apt-get install --reinstall bcmwl-kernel-source
some Info
pc model: Dell Inspiron n5050
Bios: bios not UEFI
no option to enable/disable wireless connection from boot.
No option to secure boot.
modprobe.d/broadcom-sta-common.conf file:
# wl module from Broadcom conflicts with ssb
# We must blacklist the following modules:
blacklist b43
blacklist b43legacy
blacklist b44 tried commenting out this but no luck
blacklist bcma tried commenting out this but no luck
blacklist brcm80211
blacklist brcmsmac
blacklist ssb
install wl /sbin/modprobe --ignore-install wl $CMDLINE_OPTS
modprobe.d/broadcom-sta-dkms.conf file:
# wl module from Broadcom conflicts with the following modules:
blacklist b43
blacklist b43legacy
blacklist b44
blacklist bcma
blacklist brcm80211
blacklist brcmsmac
blacklist ssb
some command outputs:
1.
lshw -C network
clipped output:
*-network description: Wireless interface product: BCM4313 802.11bgn Wireless Network Adapter vendor: Broadcom Inc. and subsidiaries physical id: 0 bus info: pci@0000:09:00.0 logical name: wlp9s0b1 version: 01 serial: 64:27:37:da:03:29 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless configuration: broadcast=yes driver=brcmsmac driverversion=5.11.0-27-generic firmware=610.812 latency=0 link=no multicast=yes wireless=IEEE 802.11 resources: irq:19 memory:f7d00000-f7d03fff
lspci -knn | grep Net -A3; rfkill list
Output: 09:00.0 Network controller [0280]: Broadcom Inc. and subsidiaries BCM4313 802.11bgn Wireless Network Adapter [14e4:4727] (rev 01)
Subsystem: Dell BCM4313 802.11bgn Wireless Network Adapter [1028:0012]
Kernel driver in use: bcma-pci-bridge
Kernel modules: bcma
0: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
1: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
Note this line in the above output
Kernel modules: bcma other outputs i saw online Kernel modules: bcma,wl
sudo modprobe wl
output: ERROR: ../libkmod/libkmod-module.c:838 kmod_module_insert_module() could not find module by name='wl' modprobe: ERROR: could not insert 'wl': Unknown symbol in module, or unknown parameter (see dmesg) modprobe: ERROR: ../libkmod/libkmod-module.c:990 command_do() Error running install command '/sbin/modprobe --ignore-install wl ' for module wl: retcode 1 modprobe: ERROR: could not insert 'wl': Invalid argument
Any suggestion?
