This error still occurs in Ubuntu 10.04 (Lucid Lynx) Beta 1.
On my test system, I've got two installations of Lucid ("Test" and "Work"):
/dev/sda1 (hd0,1) = "dm-crypt"-crypted ext3, /-Partition for Lucid Test
/dev/sda2 (hd0,2) = unencrypted ext2, /boot-Partition for Lucid Work
/dev/sda3 (hd0,3) = unencrypted ext2, /boot-Partition for Lucid Test
/dev/sda5 (hd0,5) = "dm-crypt"-encrypted ext3, /-Partition for Lucid Work
First I installed "Test", then I installed "Work". I'm currently working in
"Work".
$ mount
/dev/mapper/sda5_crypt on / type ext3 (rw,errors=remount-ro)
proc on /proc type proc (rw,noexec,nosuid,nodev)
none on /sys type sysfs (rw,noexec,nosuid,nodev)
none on /sys/fs/fuse/connections type fusectl (rw)
none on /sys/kernel/debug type debugfs (rw)
none on /sys/kernel/security type securityfs (rw)
none on /dev type devtmpfs (rw,mode=0755)
none on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620)
none on /dev/shm type tmpfs (rw,nosuid,nodev)
none on /var/run type tmpfs (rw,nosuid,mode=0755)
none on /var/lock type tmpfs (rw,noexec,nosuid,nodev)
none on /lib/init/rw type tmpfs (rw,nosuid,mode=0755)
none on /var/lib/ureadahead/debugfs type debugfs (rw,relatime)
/dev/sda2 on /boot type ext2 (rw)
$ sudo update-grub2
Generating grub.cfg ...
Found linux image: /boot/vmlinuz-2.6.32-16-generic
Found initrd image: /boot/initrd.img-2.6.32-16-generic
Found memtest86+ image: /memtest86+.bin
done
$ sudo mkdir /lucid-test
$ sudo cryptsetup luksOpen /dev/sda1 lucid-test
Enter passphrase for /dev/sda1:
Key slot 0 unlocked.
$ sudo mount /dev/mapper/lucid-test /lucid-test
$ sudo mount /dev/sda3 /lucid-test/boot
$ mount
/dev/mapper/sda5_crypt on / type ext3 (rw,errors=remount-ro)
proc on /proc type proc (rw,noexec,nosuid,nodev)
none on /sys type sysfs (rw,noexec,nosuid,nodev)
none on /sys/fs/fuse/connections type fusectl (rw)
none on /sys/kernel/debug type debugfs (rw)
none on /sys/kernel/security type securityfs (rw)
none on /dev type devtmpfs (rw,mode=0755)
none on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620)
none on /dev/shm type tmpfs (rw,nosuid,nodev)
none on /var/run type tmpfs (rw,nosuid,mode=0755)
none on /var/lock type tmpfs (rw,noexec,nosuid,nodev)
none on /lib/init/rw type tmpfs (rw,nosuid,mode=0755)
none on /var/lib/ureadahead/debugfs type debugfs (rw,relatime)
/dev/sda2 on /boot type ext2 (rw)
/dev/mapper/lucid-test on /lucid-test type ext3 (rw)
/dev/sda3 on /lucid-test/boot type ext2 (rw)
$ sudo update-grub2
Generating grub.cfg ...
Found linux image: /boot/vmlinuz-2.6.32-16-generic
Found initrd image: /boot/initrd.img-2.6.32-16-generic
Found memtest86+ image: /memtest86+.bin
done
$ sudo ls -A /lucid-test/
bin boot cdrom dev etc home initrd.img lib lost+found media mnt opt
proc root sbin selinux srv sys tmp usr var vmlinuz
$ sudo ls -A /lucid-test/boot/
System.map-2.6.32-16-generic config-2.6.32-16-generic
initrd.img-2.6.32-16-generic memtest86+.bin
vmlinuz-2.6.32-16-generic
abi-2.6.32-16-generic grub lost+found
vmcoreinfo-2.6.32-16-generic
--
grub2 doesn't recognize installations with encrypted /
https://bugs.launchpad.net/bugs/532838
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