Same trying follow https://wiki.ubuntu.com/Kernel/BuildYourOwnKernel on Ubuntu 18.04.1
$ apt-get source linux-image-$(uname -r) Reading package lists... Done Picking 'linux-signed' as source package instead of 'linux-image-4.15.0-39-generic' E: Unable to find a source package for linux-signed -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1790880 Title: apt-get source linux-image-$(uname -r) does not work on 18.04.1 LTS Status in linux package in Ubuntu: Confirmed Bug description: I cannot get the source code and therefore cannot build a driver for Ubuntu 18.04.1 LTS See link https://ubuntuforums.org/showthread.php?t=2397649 Other people have seen the same problem. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1790880/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp

