错误信息：
Can't access ACPI events in /var/run/acpid.socket! Make sure the ACPI subsystem is working and the acpid daemon is running.
解决过程：
查找web
http://forums.droplinegnome.org/viewtopic.php?p=38067
引用:[tester@的8 ~]$ ps -elf | grep acpi
1 S root 60 2 0 75 -5 - 0 - 05:12 ? 00:00:00 [kacpid]
1 S root 61 2 0 75 -5 - 0 - 05:12 ? 00:00:00 [kacpi_notify]
1 S root 1926 1 0 80 0 - 439 - 05:13 ? 00:00:00 /usr/sbin/acpid
4 S 68 2122 2090 0 80 0 - 539 - 05:13 ? 00:00:00 hald-addon-acpi: listening on acpid socket /var/run/acpid.socket
确认 ACPI 正常，查看虚拟机设置
Report battery information to guest 打勾！重新启动 Fedora 8，在桌面的右下角出现电源指示就可以添加 电池电量管理器 了。