I'm building a custom linux image, using a non-manipulated Linux kernel 2.6.32.65. the kernel boots just fine until it reaches this: EXT2-fs warning: mounting unchecked fs, running e2fsck is recommended VFS: Mounted root (ext2 filesystem) on device 3:1. Freeing unused kernel memory: 304k freed init: Unable to mount /dev filesystem: No such device init: ureadahead main process (983) terminated with status 5 init: console-setup main process (1052) terminated with status 1 I tried the solutions mentioned here although the error is not exactly the same, but no luck. I tried multiple "reference" .config files. I have been googling for a bit but I can't find anything with the same problem. I'm running this custom image on gem5 simulator, with file system from ubuntu-core and a clean kernel. earlier in the output the kernel shows this: hda: max request size: 128KiB hda: 16514064 sectors (8455 MB), CHS=16383/16/63 hda: hda1 So the kernel is able to see partitions just fine. I don't think this is caused by something in the file system. maybe initrd? or the kernel itself? how can I fix it?

Installing a new system using a GPT partitioned disk dedicated to a single partition, ext4 formatted, extlinux (version 4.05) as bootloader, Ubuntu Core version 13.10 amd64 as rootfs, and Ubuntu linux-image-3.11.0-18-generic as kernel, and extlinux-update to generate bootloader configuration. The result after reboot (still inside a KVM based virtual machine) is an (initramfs) prompt and these messages: mount: can't read '/etc/fstab': No such file or directory mount: mounting /dev on /root/dev failed: No such file or directory mount: mounting /sys on /root/sys failed: No such file or directory mount: mounting /proc on /root/proc failed: No such file or directory The filesystem doesn't have requested /sbin/init. No init found. Try passing init= bootarg. BusyBox is v1.20.2. Regression: • the file system has been checked with fsck.ext4 Check for root existence (initramfs) ls -l /dev/[hs]da* ls: /dev/[hs]da*: No such file or directory Root boot argument (initramfs) cat /proc/cmdline initrd=/boot/initrd.img-3.11.0-18-generic ro quiet BOOT_IMAGE=/boot/vmlinuz-3.11.0-18-generic Check loaded modules (initramfs) cat /proc/modules e1000 145368 0 - Live 0xffffffffa0000000 /boot folder content $ sudo ls -l boot -rw------- 1 root root 3296162 Feb 18 22:37 System.map-3.11.0-18-generic -rw-r--r-- 1 root root 1007681 Feb 18 22:37 abi-3.11.0-18-generic -rw-r--r-- 1 root root 163258 Feb 18 22:37 config-3.11.0-18-generic drwxr-xr-x 2 root root 4096 Mar 17 20:13 extlinux -rw-r--r-- 1 root root 4995000 Mar 16 23:35 initrd.img-3.11.0-18-generic -rw------- 1 root root 5634192 Feb 18 22:37 vmlinuz-3.11.0-18-generic How to make this system boot to the expected default bash prompt?