Blank screen on booting Ubuntu 11.10 from RAID

Bug #899841 reported by Youssef Eldakar on 2011-12-04
This bug affects 1 person
Affects Status Importance Assigned to Milestone
grub-installer (Ubuntu)

Bug Description

I run a network of machines each having 4 hard drives. Most are installed as JBOD (just a bunch of disks), but some are installed as RAID, where / is on a RAID1 device. After upgrading to 11.10, the RAID machines display a blank screen right at the beginning of the boot process and stop there - most of the time. The system does respond to Ctrl+Alt+Del at that state, and, every once in a while after many successive reboots, the system does boot successfully. I tested this on two different hardware configurations (nVidia chipset and Intel chipset) and with both 64- and 32-bit Ubuntu with no difference in results. The JBOD machines do not suffer from this issue.

Turning off modesetting does not seem to help. Given that the non-RAID (jBOD) setup works fine, I am thinking the issue is probably a GRUB+RAID issue, not a graphics issue. I noticed in 11.10 that /boot/grub/grub.cfg uses mduuid/* as opposed to md/*. Could that have something to do with the problem? I wonder if there is a preseed configuration to instruct grub-installer to use md/* instead of mduuid/*.

I edited /boot/grub/grub.cfg and modified mduuid/* to md/* everywhere, but the issue did not go away.

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