As Alfred explained, Ubuntu grub can not boot OpenSolaris. You can use OpenSolaris grub to load all you systems.
My way is save /boot/grub/menu.lst somewhere before install OpenSolaris. After OpenSolaris installed, put the wanted Ubuntu title section in OpenSolaris menu.list which located under /rpool/boot/grub/. In your situation, I suggest you boot your Ubuntu Live CD to get your Ubuntu menu.lst back first then do rest. Hope it helps. Halton. On Wed, 2009-08-19 at 10:56 +0800, Alfred Peng wrote: > On 08/18/09 10:59 PM, Sushant Taneja wrote: > > Hello, > > > > Today I installed OpenSolaris 2009.06 on my HP Compaq 6515b Laptop. I > > already had installed Windows Vista and Ubuntu 9.04 > > > > After installing OpenSolaris, the GRUB showed 3 options OpenSolaris, > > Windows and Windows (again). The first Windows option is the loader of > > Windows Vista while the second option shows error - "Boot Manager Missing. > > Press Ctrl+Alt+Del to restart". > > > > How can restore my Ubuntu loader ??? > > > > Regards, > > Sushant Taneja > >