Linux Kernel 4.0.4 is the forth adjustment kernel release version 4.0. List of changes in the kernel 4.0.4 can be found
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Warning. The Linux kernel is a critical element of the system. To do the upgrade costs when one of your hardware devices is not working properly, and the new kernel may fix this problem. But at the same time installing a new kernel unnecessarily can lead to undesirable regressions, such as: no network connection, no sound or even the inability to boot the system, so install a new kernel on your own risk.
1. The easiest way to use the utility KernelUpdate.
2. Open a terminal, copy and run one of the commands according to the architecture of your system/computer, at your own risk:
For 32-bit (single command):
cd /tmp && wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.0.4-wily/linux-headers-4.0.4-040004-generic_4.0.4-040004.201505171336_i386.deb http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.0.4-wily/linux-headers-4.0.4-040004_4.0.4-040004.201505171336_all.deb http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.0.4-wily/linux-image-4.0.4-040004-generic_4.0.4-040004.201505171336_i386.deb && sudo dpkg -i *.deb
cd /tmp && wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.0.4-wily/linux-headers-4.0.4-040004-generic_4.0.4-040004.201505171336_amd64.deb http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.0.4-wily/linux-headers-4.0.4-040004_4.0.4-040004.201505171336_all.deb http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.0.4-wily/linux-image-4.0.4-040004-generic_4.0.4-040004.201505171336_amd64.deb && sudo dpkg -i *.deb
Note If you have a boot loader installed BURG, and it should be updated:
sudo apt-get purge linux-image-4.0.4-*