![]() The question is, why it cannot find the kernel? Kernel and therefore it cannot proceed with the boot sequence. initramfs cannot find the device where it expects to find the actual The actual problem is the ALERT! message. Missing modules (cat /proc/modules ls /dev)įollowed by an ALERT! message (missing device). Check root= (did the system wait for the right device?) Check rootdelay= (did the system wait long enough?) Understand what the system is telling us and see if we can figure it out. Now that we know where to focus our effort, let's take a look at the error messages again. GRUB problems are most likely not an issue here. Nevertheless, you should ask yourselves whether you have manually changed anything in the GRUB menu during orĪfter the system update just before the reboot that brought your machine into this state. We're past GRUB, so GRUB should be OK, too. We are in theīoot stage before the kernel, so there seems to be nothing wrong with the kernel. Initrd.img files there, one for each kernel version that was installed.Īll right, now we understand that something went wrong with our initrd.img file, most likely. Open the /boot directory and see that you may have several instances of Whenever your kernel is upgraded, a new initrd.img file is built, containing the latest drivers for your If initrd.img is missing some modules, your system may not Initrd.img, under the /boot directory in your Linux These drivers are contained in a file called Includes disk drivers, USB drivers and maybe a few more. Initramfs uses a very small subset of drivers (called modules in Linux) to setup the hardware. Used to initialize devices so that the real kernel can load. This is a temporary file system that is loaded into memory and is The second step in the boot sequence is the loading of a very small filesystem called Initial RAM File System It begins with BIOS, which is a basic input/output system,īurned into the computer hardware and is used to initialize the hardware components. The boot sequence is a long and complicated one. While this gives us a good lead, I would like to postpone using any of the solutions for later. Refer to Google, you will find a handful of links that point mainly to Ubuntu forums, where this problem isĭiscussed, with several solutions offered. Problem seem to be the words busybox, initramfs and alert messages about devices/disks not existing. To be able to solve the problem we need to focus our effort. This problem, so that you have a clear methodology for handling similar issues in the future.Ĭompare the system state before the update and after the update For less experienced users, understanding what went wrong can be difficult.
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