请大家帮忙看一下什么原因

7月15日我打上了所有的更新，一重启就这样了
//错误信息：
Boot from(hd0,12) ext 85f53544-c781-40ed-94cb-3ad0d8a4e12c
starting up ...
[ 10.467077][Firmware Bug]:powernow-k8:Your BIOS does not provide ACPPI _PSS objects in a way that Linux understands.Please report this to the Linux ACPI maintainers and complain to your BIOS vendor.
[ 10.467165][Firmware Bug]:powernow-k8:Your BIOS does not provide ACPPI _PSS objects in a way that Linux understands.Please report this to the Linux ACPI maintainers and complain to your BIOS vendor.
Loading,please wait...
udevadm trigger is not permitted while udev is unconfigured
usplash: Setting mode 1152x864 failed
usplash: Using mode 1024x768
Gave up waiting for root device. Common problems.
-Boot args (cat /proc/cmdline)
-Check rootdelay=(did the system wait for the right device?)
-Check root=(did the system wait for the right device?)
-Missing modules (cat /proc/modules; ls /dev)
ALERT! /dev/disk/by-uuid/85f53544-c781-40ed-94cb-3ad0d8a4e12c does not exist.Dropping to a shell!

BusyBox v1.10.2(Ubuntu 1:1.10.2-2ubuntu7)built-in.
Enter 'help' for a list of built-in commands.

(initramfs)

//我在终端查的by-uuid
ubuntu@ubuntu:~$ ls /dev/disk/by-uuid/
064b68e6-3148-47c5-ac05-be6141daf2fc 49f49770-c3c3-4fa5-8b08-bb0f5c13a534
2e91824a-be80-4004-811e-87403b8a5bc1 4A9C45CB9C45B1ED
34d326d5-a239-4f99-aec0-74c3c85f5f51 7AEC928CEC924275
386C76D06C768880 85f53544-c781-40ed-94cb-3ad0d8a4e12c
3881a648-e0c5-4561-9fd5-9c80507bb1f1 862C113B2C1127A7
4052B11E3F0957BC 8A90D49790D48AD9

fstab文件：
# /etc/fstab: static file system information.
#
# Use 'vol_id --uuid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
#
proc /proc proc defaults 0 0
# / was on /dev/sda13 during installation
UUID=85f53544-c781-40ed-94cb-3ad0d8a4e12c / ext4 relatime,errors=remount-ro 0 1
# swap was on /dev/sda9 during installation
UUID=064b68e6-3148-47c5-ac05-be6141daf2fc none swap sw 0 0
/dev/scd1 /media/cdrom0 udf,iso9660 user,noauto,exec,utf8 0 0
UUID=34d326d5-a239-4f99-aec0-74c3c85f5f51 /home/getgo/data ext3 relatime 0