I have ubuntu 20.04 and suddenly the wifi become not detected( no wifi adapter found )
i have tried with installing firmware-b43 but it gives me this error:
sudo dpkg -i firmware-b43-installer_*
(Reading database ... 311808 files and directories currently
installed.) Preparing to unpack firmware-b43-installer_019-4_all.deb
... Unpacking firmware-b43-installer (1:019-4) over (1:019-4) ...
Setting up firmware-b43-installer (1:019-4) ... No chroot environment
found. Starting normal installation --2021-09-12 11:47:22--
http://www.lwfinger.com/b43-firmware/broadcom-wl-5.100.138.tar.bz2
Resolving www.lwfinger.com (www.lwfinger.com)... failed: Temporary
failure in name resolution. wget: unable to resolve host address
‘www.lwfinger.com’ /var/lib/dpkg/info/firmware-b43-installer.postinst:
Some problem occurred during the firmware download. Please check your
internet connection. dpkg: error processing package
firmware-b43-installer (--install): installed firmware-b43-installer
package post-installation script subprocess returned error exit status
1 Errors were encountered while processing: firmware-b43-installer
, also i was about trying to solve it by the image iso of the ubuntu but the software & updater when i click on it , it does not open. .
help please !!
lspci -nnk | grep 0280 -A3
---> terminal show me :
02:00.0 Network controller [0280]: Qualcomm Atheros QCA9377 802.11ac Wireless Network Adapter [168c:0042] (rev 30)
Subsystem: Lenovo QCA9377 802.11ac Wireless Network Adapter [17aa:4035]
03:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL810xE PCI Express Fast Ethernet controller [10ec:8136] (rev 07)
Subsystem: Lenovo RTL810xE PCI Express Fast Ethernet controller [17aa:381f]
sudo dmesg | grep b43
--->no response shown on the terminal
rfkill list all
---->no response shown on the terminal