DELL D620 在Feisty下挂起resume后屏幕都会挂了，只有背光没有信号。
sudo创建下面2个文件，并设置为可执行。
/etc/acpi/resume.d/40-i8042-input.sh
#!/bin/sh
# Rebind the AT keyboard interface.
if [ -f /sys/bus/platform/drivers/i8042/bind ]; then
echo -n "i8042" > /sys/bus/platform/drivers/i8042/bind
fi
/etc/acpi/suspend.d/20-i8042-input.sh
#!/bin/sh
# Unbind the AT keyboard interface.
if [ -f /sys/bus/platform/drivers/i8042/unbind ]; then
echo -n "i8042" > /sys/bus/platform/drivers/i8042/unbind
fi
