安装失败后，上网查，结果如下：
/wiki/Common_F16_bugs#Upgrade_from_Fedora_14_to_Fedora_16_with_preupgrade_leaves_bootloader_in_previous_configuration
UEFI install to Lenovo Ideapad S205 fails to boot
link to this item-Bugzilla: #748272
If you try to install Fedora 16 to a Lenovo Ideapad S205 booted via UEFI, the installed system will fail to boot. We do not yet have a complete understanding of this issue, but it appears the S205 may have a buggy UEFI implementation which prevents theefibootmgrtool from correctly writing an UEFI bootloader entry for Fedora. At present there is no known workaround for this issue. Installing in BIOS compatibility mode should avoid the problem, but it is not entirely clear from user reports and publicly available information whether the S205 actually has a BIOS compatibility mode and, if so, how to use it.
uefi在百度百科里有些说明。
悲剧阿……
网上有一种解决办法，用dvd的live usb启动并进入rescue模式，chroot /mnt/sysimage，grub-install /dev/sda 也就是安装grub代替grub2。这个我还没试过，不知道有没有效果……
