Q : How to Compile Kernel in Ubuntu
Q : Latest Kernel Compilation step's in Ubuntu
Q : Atheros 5Ghz AP Channel Enable
Q : Kernel Compile for Artheros Wifi Card to Allow 5Ghz Frequency on AP Mode
Step 1
Install compulsory packages
sudo apt-get update
sudo apt-get install linux-source fakeroot kernel-wedge build-essential
Step 2
Install Dependency
sudo apt-get install git-core libncurses5 libncurses5-dev libelf-dev asciidoc
sudo apt-get install binutils-dev crash kexec-tools makedumpfile kernel-wedge
sudo apt-get install libssl-dev bc debhelper kernel-package libc6-dev
Step 3
Download Kernel for kernel.org ( you can download latest kernel )
cd /usr/src
wget ftp://ftp.kernel.org/pub/linux/kernel/v4.x/linux-4.8.4.tar.gz
tar xvf linux-4.8.4.tar.gz
Optional Step 4 and 5, if you don’t need 5ghz access point channel for Atheros WIFI
Card, avoid step 4 and 5
Step 4
Download Patch for wifi 5ghz frequency
cd /usr/src/linux-4.8.4/drivers/net/wireless/ath/
wget --no-check- certificate https://dev.openwrt.org/export/32952/trunk/
package/mac80211/patches/403-ath_regd_optional.patch
Step 5
Apply Patch
patch -Np5 -i 403-ath_regd_optional.patch
echo "#define ATH_USER_REGD 1"|cat - regd.c > /tmp/out && mv /tmp/out regd.c
Step 6
Create .config file and make oldconfig
cd /usr/src/linux-4.8.4/
cp /boot/config-$(uname -r) .config
make oldconfig
Note: choose default option just hit the enter on every prompt or choose according your need..
Step 7
Compile, make and create .deb file
fakeroot make-kpkg --initrd --append-to-version=-linuxtopic kernel-image kernel-headers
OR
fakeroot make -j5 deb-pkg LOCALVERSION=-linuxtopic KDEB_PKGVERSION=1
Note: Wait approx 1 to 10 hour
Step 8
check .deb and Install Kernel
ls ../*.deb
dpkg -i ../*.deb
