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recently I installed the latest kernel 4.1.0-rc3 in my Ubuntu 14.04 LTS 64-bit.When I did reboot after make install, it is getting stuck after the grub listing the following error mentioning that it has been calling CRDA to update world regulatory domain for 4-5 times-

*   cfg80211:Exceeded CRDA call max. attempts. Not calling CRDA
    [234.021955] random: non-blocking pool is initialized
    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/sda1 does not exist. Dropping to a shell!

BusyBox v1.21.1 (Ubuntu 1:1.21.0-1ubuntu1) built-in shell (ash)
Enter 'help' for a lost of built-in commands.

(initramfs)*

I checked for the solution in the following thread and made all the three attempts mentioned in one of the answers, but it still didn't help in correcting the error.

Gave up waiting for root device on Ubuntu

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To boot: select advanced options from the initial grub menu, then, choose an older kernel and then try to figure out where you went wrong with your kernel build.

Did you build a new initrd? What about grub, is it updated.

  • Yes Grub is updated..I can see the initrd getting created for the respective kernel using ** ls -l /boot/initrd **.. It's the same issue as in askubuntu.com/questions/247541/… – Shubham_K May 13 '15 at 10:39
  • But the difference is that I'm not able to get it going right even after doing all the 3 attempts mentioned in the above thread – Shubham_K May 13 '15 at 10:40
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I faced the EXACT same problem when i tried to install a new kernel in my Ubuntu 14.04 LTS. The reason was that you cannot install a generic linux kernel from the tree directly that way. You need an ubuntu version of whatever version you want to install.

Look at this post for reasons:

Can I install Linux kernel in Ubuntu appart of the default one?

So i followed the steps in this link to intall v4.3 in my ubuntu and it works absolutely fine:

http://www.yourownlinux.com/2015/05/how-to-install-linux-kernel-4-0-3-in-linux.html

I'm a newbie in this field so this is what i resorted to after almost a week of struggle. If you find a way however, to install a generic kernel then please go ahead and let me know!

Good luck!

Thanks, Sid.

  • I don't agree with what you said regarding installation of the generic Kernel in Ubuntu...I have installed the Generic kernel 4.0.2-040002-generic in Ubuntu 12.04 32-bit using the generic ways of make,make menuconfig , make modules,make modules_install and make install..and The new kernel booted perfectly fine...But the same steps and the processes are not going well with Ubuntu 14.04 64-bit... – Shubham_K May 26 '15 at 14:26

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