<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type"> </head> <body bgcolor="#ffffff" text="#000000"> jonathan barkelew wrote: <blockquote cite="mid9B4771B4D9FB73498B40311D4E7E8EE502D5947B@atl-ms2.us.megatrends.com" type="cite"> <meta http-equiv="Content-Type" content="text/html; "> <meta name="Generator" content="MS Exchange Server version 6.5.7651.59"> <title>UEFI Compatibility Issues in Fedora 10</title>  The second issue is far more pressing, and much more difficult to solve. The linux kernel will behave incorrectly if more than 400k of runtime memory is declared by system firmware. The kernel attempts to map all UEFI runtime memory into the kernel fixmap table, and any requests to map more than 400k are silently ignored. If this memory is accessed later in the boot process (after transition to virtual mode), the kernel will panic. It is my understanding that this mechanism was designed to enable kexec functionality, but this mechanism is UEFI non-compliant. If Fedora is ever to be reliably booted on UEFI systems, this issue must be addressed. </blockquote> BTW, I can also forward you the patches for this if you need to use an older kernel for some reason. Let me know... Brian </body> </html>