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测试为实模式下burg(非efi模式),能启动ubuntu14.10及之前版本,Ubuntu14.10之后的版本无法启动,提示错误,错误信息:kernel panic -not syncing :VFS:Unable to mount root fs on unknown-block(0,0) 
求大神指点! 
测试的burg菜单: 
menuentry "Ubuntu Live CD" --class ubuntu  { 
set iso_path="/ubuntu-14.10-desktop-amd64.iso"  或者Ubuntu14.10之后的版本如16.10 
search -s -f ${iso_path} 
map ${iso_path} (cd96) 
linux (map224)/casper/vmlinuz.efi boot=casper iso-scan/filename=${iso_path} quiet splash --- 
initrd (map224)/casper/initrd.lz 
} 
或者菜单: 
menuentry "Ubuntu Live CD" --class ubuntu  { 
set iso_path="/ubuntu-14.10-desktop-amd64.iso"  或者Ubuntu14.10之后的版本如16.10 
search -s -f ${iso_path} 
loopback loop ${iso_path} 
linux (loop)/casper/vmlinuz.efi boot=casper iso-scan/filename=${iso_path} quiet splash --- 
initrd (loop)/casper/initrd.lz 
} |   
 
 
 
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