老主板不支持么？同一个u盘，放新主板是正常的，老主板就会出现下面提示。。。
[Minimal BASH-like line editing is supported.For the first word,TAB lists possible command completions. Anywhere else TAB lists the possible completions of a device/fileanme]
grub>_
[Minimal BASH-like line editing is supported.For the first word,TAB lists possible command completions. Anywhere else TAB lists the possible completions of a device/fileanme]
grub>_