是从这里找到的方法：http://www.ubuntuforums.org/showthread. ... end+to+ram
具体步骤：
1、修改/etc/default/acpi-support
代码： 全选
# Comment the next line to disable ACPI suspend to RAM
ACPI_SLEEP=true
# Comment the next line to disable suspend to disk
ACPI_HIBERNATE=true
# Change the following to "standby" to use ACPI S1 sleep, rather than S3.
# This will save less power, but may work on more machines
ACPI_SLEEP_MODE=mem
# Add modules to this list to have them removed before suspend and reloaded
# on resume. An example would be MODULES="em8300 yenta_socket"
#
# Note that network cards and USB controllers will automatically be unloaded
# unless they're listed in MODULES_WHITELIST
MODULES=""
# Add modules to this list to leave them in the kernel over suspend/resume
MODULES_WHITELIST=""
# Should we save and restore state using the VESA BIOS Extensions?
SAVE_VBE_STATE=true
# The file that we use to save the vbestate
VBESTATE=/var/lib/acpi-support/vbestate
# Should we attempt to warm-boot the video hardware on resume?
# 我主要是修改了这里，原来为true
POST_VIDEO=false
# Save and restore video state?
SAVE_VIDEO_PCI_STATE=true
# Should we switch the screen off with DPMS on suspend?
USE_DPMS=true
# Use Radeontool to switch the screen off? Seems to be needed on some machines
# RADEON_LIGHT=true
# Uncomment the next line to switch away from X and back again after resume.
# This is needed for some hardware, but should be unnecessary on most.
# DOUBLE_CONSOLE_SWITCH=true
# Set the following to "platform" if you want to use ACPI to shut down
# your machine on hibernation
HIBERNATE_MODE=platform
# Comment this out to disable screen locking on resume
LOCK_SCREEN=true
# Uncomment this line to have DMA disabled before suspend and reenabled
# afterwards
# DISABLE_DMA=true
# Uncomment this line to attempt to reset the drive on resume. This seems
# to be needed for some Sonys
# RESET_DRIVE=true
# Add services to this list to stop them before suspend and restart them in
# the resume process.
STOP_SERVICES="mysql "
# Restart Infra Red services on resume - off by default as it crashes some
# machines
RESTART_IRDA=false
# Switch to laptop-mode on battery power - off by default as it causes odd
# hangs on some machines
ENABLE_LAPTOP_MODE=false
（also in my /boot/grub/menu.lst file i get rid of the splash and quiet tags in the defoptions line.）
我的笔记本是东芝笔记本。终于解决这个苦恼我已久、花了我无数时间的问题，心里好高兴。发在这里给有需要的朋友分享。
