Collin,
I just download the 20131016.1 daily live cdimage, and record it into
DVD, then boot up from CDRom.
When secure boot is disabled, and UEFI first, it's just hang after the
"error: variable 'root' isn't set."
When secure boot is enabled, it will boot up to recovery partition, I can hear
the drive noise when select boot from DVD driver.
When it's in the UI of restore, I switch to tty1, you can find my recovery
partition /dev/sda1 is mounted as /cdrom.
$ df -kh
Filesystem Size Used Avail Use% Mounted on
/cow 1.6G 31M 1.6G 2% /
udev 1.6G 4.0K 1.6G 1% /dev
tmpfs 649M 836K 648M 1% /run
/dev/sda1 1.5G 1.2G 279M 82% /cdrom
/dev/loop0 1.1G 1.1G 0 100% /rofs
tmpfs 1.6G 20K 1.6G 1% /tmp
none 5.0M 4.0K 5.0M 1% /run/lock
none 1.6G 76K 1.6G 1% /run/shm
And from dmesg log you can find the kernel's boot parameter.
0.000000] Initializing cgroup subsys cpuset
[ 0.000000] Initializing cgroup subsys cpu
[ 0.000000] Linux version 3.5.0-36-generic (buildd@allspice) (gcc version
4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5) ) #57sutton6-Ubuntu SMP Wed Sep 4 10:49:49
UTC 2013 (Ubuntu 3.5.0-36.57sutton6-generic 3.5.7.14)
[ 0.000000] Command line: BOOT_IMAGE=/casper/vmlinuz
ubuntu-recovery/recovery_type=hdd boot=casper automatic-ubiquity noprompt quiet
splash -- mem=4GB locale=zh_CN.UTF-8
[ 0.000000] KERNEL supported cpus:
[ 0.000000] Intel GenuineIntel
[ 0.000000] AMD AuthenticAMD
[ 0.000000] Centaur CentaurHauls
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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'.
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