Comment 37 for bug 112132

Ned, you do not need to make livecd to test kernel.
we can try do it with build in initramfs, bat you need some storage to save dmesg in, for example usb-stick.

1. plug the usb-stick in.
2. boot with kernel option break=mount
3. mkdir mnt
4. mount -t vfat /dev/sdb1 /mnt ( edit it to your need, change file system type and device location )
5, dd if=/proc/kmsg of=/mnt/dmesg
6. wait 5 seconds and reboot with ctrl+alt+del

if you have some correction, please lat me know ;)