qemu: boot from cdrom I'm trying to install `xubuntu` on a usb flash drive following this quide. The command I'm running is qemu-system-x86_64 -drive file=/dev/sdc,media=disk,index=0,format=raw -cdrom ./xubuntu-15.10-desktop-amd64.iso -boot menu=on `/dev/sdc` is my usb drive formatted as `ext4`. It starts to boot from `xubuntu*.iso`, as I can see this screen ![]( But then I get kernel panic ![enter image description here]( I was able to boot this image with `virtualbox`, though. Which partition is it tring to mount? This must have nothing to do with `/dev/sdc`, or not? What am I doing wrong? Any clues?

It seems this obscure error is due to the ramdisk of the kernel image having grown so much these days that it no longer fits in the default size for ram memory of the qemu virtual machine (which is quite low at 128 MiB). Simply add a memory option like:


-m 512M