I was trying to compile Linux kernel from source file i.e. 3.19.3 kernel version I ran the following commands for compilation

first I extracted

tar -xvf linux-3.19.3.tar.xz

changed to its directory

cd linux-3.19.9

sudo make menuconfig

Didn't change anything

sudo make -j4
sudo make install-modules install

I was following instructions given here

after reboot it is giving following message and dropping to initrafms

Gave up waiting for root device. common problems:

  • Boot args (cat /proc/cmdline)
    • Check rootdelay= (did the system wait long enough?)
    • Check root= (did the system wait for the right device?)
  • Missing modules (cat /proc/modules; ls /dev) ALERT! /dev/disk/by-uuid/50ec5956-06a0-41b1-9315-0a68fd15270a doesnot exist.

Dropping to shell!


I am getting this screen. what should I do? And how should I compile the kernel to avoid this kind of error

  • Have you executed the command depmod -a ?
    – SHW
    Apr 10, 2015 at 6:41
  • @SHW no i havent used depmod -a Apr 11, 2015 at 8:24
  • Then execute the command
    – SHW
    Apr 13, 2015 at 4:46
  • @SHW i tried depmod -a and then did sudo make install-modules install it is working now. thanks. i think your solution should be in answers. Apr 13, 2015 at 21:48

2 Answers 2


After kernel compilation, one must execute the command depmod -a to refresh the module order in directory /lib/modules/<kernel_version>


I take it that you changed into linux-3.19.3 directory before running the make commands. And it seems that this version of the kernel that was running before you compiled and installed.

Try to boot into an older kernel using grub (the same kernel with rescue will probably not work).

Using a vanilla source on an Ubuntu system has never worked for me. It might work, but I suggest you started with the sources of the Ubuntu kernel:

sudo apt-get source linux-image-3.19.3 
sudo apt-get build-dep linux-image-3.19.3

and rebuild and install that as a package to keep a kernel more compatible with the rest of your installation.

Change to the root of the installed source tree and do:

fakeroot debian/rules clean
fakeroot debian/rules binary-headers binary-generic

This gives you a debian package that you can install with dpkg.

Details can be found here

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