And I create a bootable USB with the same image, when boot up from USB, it works fine.
Filesystem Size Used Avail Use% Mounted on /cow 1.8G 42M 1.8G 3% / udev 1.8G 4.0K 1.8G 1% /dev tmpfs 368M 1.2M 367M 1% /run /dev/sdb1 4.0G 892M 3.2G 22% /cdrom /dev/loop0 843M 843M 0 100% /rofs none 4.0K 0 4.0K 0% /sys/fs/cgroup tmpfs 1.8G 16K 1.8G 1% /tmp none 5.0M 4.0K 5.0M 1% /run/lock none 1.8G 144K 1.8G 1% /run/shm none 100M 28K 100M 1% /run/user And from dmesg log you can find the kernel's boot parameter. [ 0.000000] Linux version 3.11.0-12-generic (buildd@allspice) (gcc version 4.8.1 (Ubuntu/Linaro 4.8.1-10ubuntu7) ) #19-Ubuntu SMP Wed Oct 9 16:20:46 UTC 2013 (Ubuntu 3.11.0-12.19-generic 3.11.3) [ 0.000000] Command line: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/ubuntu.seed boot=casper only-ubiquity quiet splash -- -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1097570 Title: grub2-signed can not find the right device when there are two filesystems containing the file '.disk/info'. To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1097570/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
