first of all download and extract the missing Firmware.

//replace mymissingfirmware with your downloaded Filename or Firmware
tar -xzf mymissingfirmware.tgz
cd mymissingfirmware
cp myfirmware*.{ucode,pnvm} /lib/firmware/

//now we need to Update the System |mabe u need sudo in front
update-initramfs -k all -u -v

init 6