Comment 23 for bug 312554

Also hit by this bug with kernel 2.6.28-15, booting fine with old 2.6.24-24 (have not tried with intermediate versions). If the initrd is not used, the kernel boots fine as indicated in previous posts. At first sight, there is no problem in using the system after booting without the initrd (how necessary is the initrd? any disadvantage for not using the initrd at boot?).
As the size of the kernel has increased a lot from 24-24 to 28-15 (almost double size), I think that the system cannot cope with the larger kernel and the initrd at the same time. What are the memory requirements for booting with 2.6.28-15 plus initrd?
Updating BIOS changes nothing for me, my BIOS has not either the "Memory Hole" option anywhere.