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How to solve boot problems with Ubuntu after kernel upgrade?
To affect this change, you need to append rootdelay=XXX to the kernel line in the GRUB menu. XXX is a timeout in seconds the system will wait before trying to load the kernel. Various forum threads suggest 120 seconds or more. Again, remember that there was no need to do this before the update.
Why is Ubuntu not booting on my computer?
Boot your computer while holding the Shift key. If you see a menu with a list of operating systems appear, you’ve accessed the GRUB boot loader. If you don’t see a menu with a list of boot options appear, the GRUB boot loader may have been overwritten, preventing Ubuntu from booting.
What to do if Grub wont boot in Ubuntu?
If you can’t access GRUB, you’ll need to repair it. You can use an Ubuntu installation disc or USB drive to do this. Boot into the USB drive and use the the Linux system to repair GRUB. We have a guide to reinstalling the GRUB2 boot loader on Ubuntu, either with a graphical Boot Repair tool or by using standard Linux terminal commands.
Why is initramfs not able to boot after kernel upgrade?
The actual problem is the ALERT! message. initramfs cannot find the device where it expects to find the actual kernel and therefore it cannot proceed with the boot sequence. The question is, why it cannot find the kernel? This is where we refer to the first part of the message, the common problems section.
Is it possible to compile your own kernel?
Building and using a custom kernel will make it very difficult to get support for your system. While it is a learning experience to compile your own kernel, you will not be allowed to file bugs on the custom-built kernel (if you do, they will be Rejected without further explanation).
What happens to the initrd.img file after a kernel upgrade?
Whenever your kernel is upgraded, a new initrd.img file is built, containing the latest drivers for your kernel. You can check this by yourself. Open the /boot directory and see that you may have several instances of initrd.img files there, one for each kernel version that was installed.