Comment 23 for bug 778520

I am also experiencing problems related to booting with a degraded md RAID1 array. I performed a clean install of 64 bit Mythbuntu 11.10 onto a single disk on an i3 2100 system. Note that I have configured this system for UEFI booting. Later I added a second disk, performing the following steps:

Installed Seagate ST31000528AS Barracuda 7200.12 1TB drive.
Partitioned as single GPT partition using parted.
Created RAID1 array with single disk.
  mdadm --create --verbose /dev/md0 --level=mirror --raid-devices=2 /dev/sdb1 missing
Created ext4 filesystem on /dev/md0 using mkfs.ext4.
Used blkid device to determine UUID.
Added entry in /etc/fstab to mount filesystem using UUID. Mount point
of /mythtv/drive0.
Created mount point using mkdir.

After adding the disk, booting gives me a blank screen and never displays any messages. This is with set gfxpayload=$linux_gfx_mode, quiet, and splash. If I remove those, the screen stays blank for ~20 seconds, then the busybox/initramfs screen is displayed. Once busybox is displayed, a switch to vt7 reveals the degraded RAID messages. In both cases the kernel option vt.handoff=7 is being passed.