Thinkpad T23使用ACPI电源管理！

我的ThinkPad T23一直用APM的电源管理，进来研究ACPI，突然发现ibm_acpi模块，对于T23的支持也不错！于是研究了一下，把电源管理切换到了ACPI方式来。
首先需要确认BIOS版本支持ACPI和ibm_acpi模块加载正确，
执行，
dmesg |grep acpi
在我的机器上可以看到这样的信息，

ibm_acpi: IBM ThinkPad ACPI Extras v0.12a
ibm_acpi: http://ibm-acpi.sf.net/
ibm_acpi: dock device not present
[<c01462f3>] kmem_cache_alloc+0x40/0x4f [<c0202c85>] acpi_os_acquire_object+0xb/0x3c
[<c02171b1>] acpi_ut_allocate_object_desc_dbg+0x13/0x49 [<c021704b>] acpi_ut_create_internal_object_dbg+0xf/0x5e
[<c02136d4>] acpi_rs_set_srs_method_data+0x3d/0xb9 [<c02a881d>] cpufreq_cpu_put+0xa/0x2c
[<c02a9ac0>] cpufreq_resume+0xab/0x200 [<c021aa3d>] acpi_pci_link_set+0x102/0x17b

说明acpi被支持，Linux版本是Fedora Core 4。
如果bios或内核不能正确支持ACPI管理方式，可以到这里
升级。

然后确认内核包含模块ibm_acpi，可以用命令lsmod查看有否加载或命令modprobe查询是否有此模块，注意用root用户执行这些命令。该模块如果加载成功，可以用ls查看到/proc/acpi/ibm/下的一些文件。

配置acpid服务的应用脚本！
配置acpid主要是在/etc/acpi/actions下面放置需要执行的命令，如sleep.sh这样的命令执行计算机睡眠的具体操作，而在/etc/acpi/event/下面放置触发这些操作的事件和时机。比较快的方法是去ibm_acpi项目下载该软件包，里面包含了一些现成的脚本和应用例子。

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