For those installing the Fedora 15 Alpha into a VM, just a quick note — virt-manager currently defaults to 512MB of RAM for its VMs. This isn’t enough RAM to boot the Alpha installer.
[11:37:59] <wwoods> F15 will need at least 640MB
[11:38:02] <wwoods> maybe 768
[11:38:42] <wwoods> I have a fix for that in the works but it’s kind of invasive and may not be ready ’til F16
Symptoms of trying to boot with too little memory may include a kernel oops when installing the rootfs. Hope this helps people avoid head scratching later :-).